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  »  New  Where are our good phonostages?..  Omnigon Tubes...  Analog Playback Forum     61  422484  05-31-2004
05-28-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 1
Post ID: 2453
Reply to: 2453
I need a “second-type” phonostage.

Ok, what would believe…. but I am in needs to get another phonostage. Te older I become the lazier I become and there is no way I would switch those cables form tonearms again. Also, each time I switch the cables the unused cables drops behind my rack. It sucks! Before I was able to stick myself behind the rack and pick them up but nowadays, since I becoming circumferentially challenged my fat body does not fit behind the rack anymore. So, I need another phonostage to drive my other tonearms.

I do not need a phonostage that would take medals, “push envelops” or send the Framer-like Morons into their multiple reviewing orgasm. I have two phonostage that I ma planning to continue to use with my reference stereo and reference mono tonearms (ET SU2 +2834PT for stereo and 7788-7721 with EAR’s feedback for mono). They deliver the quality that I need and they sit very permanently in the system. Since I was not able to make a switching multi-jack router at the SU2’s input (to little current form cartridges to switch them painlessly) then in order do not compromise the “reference” postages I need one more phonostages to drive “other” tonearms. It defiantly should not be bad sounding phonostage but I would be liberal with its sonic capacities.

I was thinking to build one but as lazy as I am I do not want to have those hassles to solder with one hand and with other hand trying to catch my Koshka who just stolen resistors from my table… So, I juts do not want to build anything if it is not necessary as I feel that the “second-type” phonostage should be bought and forgotten....

OK what I need:

1) Irrelevant look and appearance
2) Irrelevant topology (RC, RLC, feedback, SS, tubes, hybrid, ethanol, Da Vinci code… whatever)
3) >75dB gain
4) Small size
5) better then 80dB noise

Also, I would have two other off the wall requirements:

1) It should not be expansive. My rational is not to save money but reasonability. If it cost for instance more then $1000 then… Well what would be then? My wonderfully performing 7788-7721 has 64dB gains and it would take for me a day or two to assemble one more unit and add to it one more gain stage. So, the prospective phonostage should not cost more then I do per day-two or I just would build it myself form the parts that I do have and, being a Jew, would pay to myself.

2) It should have a space at input as I most likely would add 3-4 inputs there. Alternatively the prospective phonostage should have an agreeable manufacture who would take my extra payment and will add at least 3 input himself. I would supply all necessary tested materials to do the job.

The person who would provide me with a successful lead to the above described phonostage would receive a rewords. It will not be frantically tangible reword but rather audible reword. I assure a unique and extremely high musical value of the reword.

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-28-2006 Post does not mapped to Knowledge Tree
Ronnie
Stockholm
Posts 81
Joined on 06-30-2005

Post #: 2
Post ID: 2454
Reply to: 2453
cheap and cheerful
Not expensive
Small size
Irrelevant look and appearance Wink

Don't know about the other specs. It would be easy to pull it out of the box and change to a bigger one with more inputs.

I had to change the tubes, which were a bit microphonic, and the damn unshielded box makes it very sensitive to placement... Don't know if there are 110V versions either... and I'm not even sure if they are still being manufactured. Haven't turned up on eBay for a while. Smile

I bought the MM version (without that first SS stage). Well. I have had no LF results with my analog at all, so I'm just listening to the PC (wav) for the moment. =)
Horrible advice, but it would be fun to hear what you think!

http://cgi.befr.ebay.be/Australis-Electroacoustics-Valve-tube-MC-Phono-Stage_W0QQitemZ5841810819QQcategoryZ3283QQcmdZViewItem
05-29-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 3
Post ID: 2456
Reply to: 2454
Re: SS phonocorrectors

 Ronnie wrote:
Not expensive, Small size...cheap and cheerful....

…which actually brings another question: “why there is not a lot 'better' SS phonostages out there?” I am far from possessing expertise to assess this subject objectively or to evaluate it technically but still? I remember during my quest for a perfect buffer the SS had spectacularly won over tubes.

http://www.goodsoundclub.com/TreeItem.aspx?postID=957#957

Not only that. I spoke with many many many quite serious designers who confessed to me that they never ever were able to make absolutely transparent sounding no-gain buffer. So, if a SS solution can deliver an absolutely transparent buffers then why SS should not make a good phonostage? It looks like signal to noise ratio is also very much on the SS side….
 
Of course there are hundreds of cheap SS MM/MC phonostages, stand-alone and built-in  into the various consumer prodacts. I tried a few and they sounded garbage-like. However it indicates only that what I tired was bad but it does not suggest that any SS at phono-level should suck. The Guy Hammel’s  buffer is a clean vindication of that fact.

So, what happens at top-of-objectives SS phono market? Keith Herron’s VTPH-1 phono corrector has in it’s MC configuration a SS gain stage. I did not own this phonocorrector, but heard it a few times. Generally the Herron’s products sounds quite pleasant and his phono sounds promising.  Lloyd Walker has his purely SS 66dB phonostage with some kind of secretive NASSA- flying, Pentagon-confidential, Baghdad flea market selling SS chip. I heard it as well in a number of occasions. The phonostage was OK probably would require some in-house audition-evaluation in order to say something more defiantly. I never pursued this SS as I generally do not find that Lloyd Walker is worthy audio thinker or interesting audio designer. All Walker’s products are just the glorified tweaking, with brainless design philosophy and cheap marketing propaganda spread by ironically-accidentally… the idiots-users. Still, it is possible that Walker’s phonocorrector might sound fine if it would be made without participation of the Walker’s head . John Curl with his  ”fun club” has his Vendetta Research (Blowtorch), FET-based phonocorrector. It has 62-70dB gain, little low but also low noise. I heard the Blowtorch many times, it sounded OK but I never heard it driven by MC. Some people like this Vendetta phonocorrector some do not. I never pursued Vendetta because my high disrespect to John Curl and that entire consciousness that sits behind all those people of the John Curl’s club. They are culturally not equipped and intellectually corrupted to make any more or less serious audio. Still, it settles down my personal relation with Vendetta (Blowtorch) but dose not address the question about the SS applicability for phono-correctors. Jonathan Carr has his Connoisseur phonostage that reportedly is very good. I heard it twice in uncontrolled condition. I can’t say anything about it and it should be heard more properly (preferably with no Lyra cartridges)

Interesting that I looked for the top of the line, expansive, “big and flashy” phonocorrectors but it is very possible that some $299 cheap SS box would do better? Would it be?

So, why tubes in phonocorrector if the tubes can’t do make a sonically transparent buffer? Perhaps marketing-wise the guys who do analog want to see tube? I do not know. Screw the marketing and screw the prejudices. Let to see and hear the actual results. It would be very good if any small SS devise would do 80dB gain… Or perhaps it is necessary to add to my 7788-7721 phonocorrector another stage and forget about it? The answer is pending….

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-31-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 4
Post ID: 2460
Reply to: 2453
“Second-type” phonostage: DACT CT-100?

While Dima and I were thinking how to get out of our 7788-7721 80dB gain, a visitor in reply to my inquiry above about a “second-type” phonostage sent me a link that make me very much queries. He suggested looking at DACT CT-100 phono module. It is relatively inexpensive ($700), objectively made; build up SS unit with 80dB gain. The characteristics are impressive and the performance is unknown…

http://www.dact.com/html/phono_stages.html

The fan part with this solution might be that it cold be made very small and position it in a comfy location that would actual make to switching cables very comfortable. In addition it could be driver by DC… So who know perhaps it might e very interesting area to explore…. Well, it will be “second-type” phonostage, right? Who know, perhaps it would do. Is someone familiar?

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-31-2006 Post does not mapped to Knowledge Tree
Gregm
Greece
Posts 91
Joined on 02-16-2005

Post #: 5
Post ID: 2461
Reply to: 2460
DACT et alia
I am somewhat familiar with the dact: I used it in non controlled manner but familiar environment; it was assembled by someone else who also provided the necessary power supply; it was in two chassis about 15x15x~30 cm each (one for ps), so the equaliser part was easily placed in a practical position vs the rest; I used no active line preamplification stage (just a tvc); no measurements available (I just listened).
So.. assuming something is better than nothing, here goes:

No immediate anomalies relating to variations in the input signal.. the "energy response" (for wont of a better expression) seemed stable and correct especially in the mid-range. Mahler did not sound like Bruckner: you understand what the musicians want to play (and, basically, how they want to play).

OTOH the "relative energy" in the frequency spectrum was a bit lacking (e.g. the midbass region vs. mid+upper-mid range) and the extension in the higher frequencies seemed diminished. This was puzzling and I tried to find where the quasi low-pass filter was -- but couldn't find it (they have a XkHz control switch somehwere -- that wasn't it). A small thing maybe -- but this was probably the reason I heard notes disappearing below easy audibility a bit too quickly ("decay" and "low-level detail" in audio-moronic).

On the whole an OK/good phono because it correlates you to the input signal -- rather than introduce its own "improvements" to what the silly maestro was doing (for example: when the phono manages to bring the percussion in front of the orchestra, the violins in the back-stage and the soprano in-between the two).

Another phono I liked better (but again with this puzzling fall in hi-fre energy -- but less so, and with better "sound" energy escaping its circuit) is called ASR "mini basis". It's bigger (about as big as the two dact chassis above put together) & ready-made. It's the small brother of a super-deluxe, ref/ultimate, etc, offering that was fashionable some years ago. The "asr mini" costs ~800-900. It too has max 80db gain & the usual input adjustments.
Problem: I can't find any meaningful info on this thing except for this: http://www.manger-audio.co.uk/amplifiers-asr-basis.htm

Cheers
05-31-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 6
Post ID: 2462
Reply to: 2461
A little IC phonostage... for $7K.

Thanks, Gregm.

My primary concern with all those IC-based phonostages is that they are thin like hell. The audio freaks like it, I do not. I never heard the DACT CT-100 and can not speculate. I have seen this one:

http://www.goodsoundclub.com/PDF/DACT_Phono.pdf

quite unpleasant observation as I can see. Although I would not let the article to stay in a way of my own perception but frankly speaking what Charles have found id very close to what I would expect. Also, the DACT reply was quite a moronic as well. Still, I do not know…..

Thanks for pointing out the ASR’s little IC phonostage. I have a strong dislike of ASR: their amps are horrible – the real nightmare of any amplification. This battery powered phonostage might be different – I do not know. I spoke with a local guy who sells it and he of course had passed very positive feedback. He is not far and I might hear it in person. There is something strange with that ASR phono: you say that it is 80dB gain maximum, the manual from two other people says 70dB and 76db. OK, you might not know but the manual from the damn company should be kind of more agreeable. The list praise for this unit is also not around ~800-900 but $7.000. Although the street price is much lower but still: how much a damn IC-based phonostage should cost? The entire TV of DVD played nowadays cost $100 and the IC-based phonostage has 1% complexity of that TV and built with the same technologies and parts. $7K is not what I am wiling to spend for the “Second-type” phonostage, not to mention that in that ASR phonocorrector is the most expansive part in battery that cost $19.88 in “You do it electronics”. Of course my fanatical beaching has nothing to do with the way in which that ASR’s phono might sound (I still do not have a lot of expectations)  but for $7K I am very strongly negatively predisposed.

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
05-31-2006 Post does not mapped to Knowledge Tree
Antonio J.
Madrid, Spain
Posts 272
Joined on 08-16-2004

Post #: 7
Post ID: 2463
Reply to: 2462
Trichord Dino?
It's a MM/MC phono stage which at maximum gain provides 74dB. The price 329 GBP, higher if ordered with dedicated PSU, but that price includes "wallwart" AC transformer. You can take a look here: http://www.trichordresearch.com/dino.html They don't state the noise floor.

I haven't listened to it myself, so I don't have a clear picture of its "sound", but a friend told me that it is a performer pretty close to the EAR834P without mods and with stock tubes. More for people looking for some meaningful music than pirotechnics sound.
05-31-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 8
Post ID: 2464
Reply to: 2463
IC-based "second" phonostages? Perhaps, who knows….

Yes, I know, Antonio, thanks. There are a lot of IC-based phonostages out there. I have no technical reasons to say that they should be bad but unfortunately they sound kind of “identically bad”. You see no one make them to sound in a “tailored”, defined, objectionable way but people juts put together few op-amp and get “as is” sound. Not to mention that people who know something about op-amps and electronics mostly are clueless about Sound.

It is possible that someone does a well sounding, 80dB IC-base correctors, why not, I just do not know how can I learn about it. A few years ago I bout one of those correctors. I forgot the name; I think it was some kind of “Project”. All high-end stores sold it for near 300 but my local pro music shop sold it almost 8 times cheaper. Initially I was very impressed that actual for those $40 t did RIAA, have no noise and so on but eventually when I moved form a cheap MC to a reasonably good MC I learned that it had unacceptable sound of nothingness. Still, what disgust me in the IC-base RIAA correctors is not the way in witch they might sound but that way in wish they are marketer. Any IC-base RIAA corrector should cost $30, with no expiations. I have called to a local guy who it trying to sell the ASR correctors for $7K and he begging to sing me the songs that ASR do not use the regular ICs but the ICs that they removed form the demilitarized Russian nuclear missiles console and fallen Chinese satellites. I do not think that he passed any message to me beside unavailingly informing me that apparently any single customer who he deal with him was an incredible idiot.

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-01-2006 Post does not mapped to Knowledge Tree
Gregm
Greece
Posts 91
Joined on 02-16-2005

Post #: 9
Post ID: 2468
Reply to: 2464
Re: IC-based "second" phonostages? Better look into ss instead??
"ASR do not use the regular ICs but the ICs that they removed form the demilitarized Russian nuclear missiles console and fallen Chinese satellites" Smile
.
..which means that they use cheap, used ICs. So, the dealer has a better margin & can discount w/out going out of business...

However, unlike your dealer, I was referring to the entry level asr: I checked & it's called "mini-basis". I know the one yr dealer is trying to push to you & it's most of what you don't want: apart from the price (which puts it outside the scope of what you're looking for anyway), it's a very large two boxes product; the riaa box has to be on a top shelf to allow access to loading & gain controls; and it's heavy...

There's no point in my suggesting 15 products that look OK but I haven't heard (one ex: http://www.customanalogue.com/jlti_phono_stage.htm) -- but remembered that pass-labs publishes plans for a ~60dB phono called "pearl": http://www.passdiy.com/projects/pearlono1.htm which shouldn't cost much. I've heard the Xono but not this. At least they come from the same stable.
The Pass uses jfets rather than denuclearised Russian military ICs...
06-01-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 10
Post ID: 2469
Reply to: 2468
Phonostages, photography and JLTi

 Gregm wrote:
"ASR do not use the regular ICs but the ICs that they removed form the demilitarized Russian nuclear missiles console and fallen Chinese satellites" Smile
.
..which means that they use cheap, used ICs. So, the dealer has a better margin & can discount w/out going out of business...

However, unlike your dealer, I was referring to the entry level asr: I checked & it's called "mini-basis". I know the one yr dealer is trying to push to you & it's most of what you don't want: apart from the price (which puts it outside the scope of what you're looking for anyway), it's a very large two boxes product; the riaa box has to be on a top shelf to allow access to loading & gain controls; and it's heavy...

There's no point in my suggesting 15 products that look OK but I haven't heard (one ex: http://www.customanalogue.com/jlti_phono_stage.htm) -- but remembered that pass-labs publishes plans for a ~60dB phono called "pearl": http://www.passdiy.com/projects/pearlono1.htm which shouldn't cost much. I've heard the Xono but not this. At least they come from the same stable.
The Pass uses jfets rather than denuclearised Russian military ICs...

Well, Gregm, obviously you should not take me too literally when I mention the “fallen Chinese satellites”, I slightly dramatized what was sod to me, making it more absurd, but did I? The conversation was exactly like this:

- OK, how does it cost?
- Around $7K
- How came that a cheap and small IS-based unit could cost $7K
- It uses everything from military
- What “from military”?
- I do not know.

I really do not feel that it might be more idiotic then that and particularly knowing that whatever this dealer sells, able to sell, or even able to understand is completely primitive.

Thanks for pitching me the different options I will certainly give it consideration. One of the problems of mine that I can’t use the commonly accepted definition of “good sounding phonostage” for myself. People out there, form my perspective, looking for very specific sound in phonostages. I would characterize it as sharp, impressive, bold, shmaltz-like with excessive sentimentality and showy transacted harmonics. When they get this form a phonostage (99.9%) of them then they feel that they get “quality” or at least have a “conformation of quality”. I really really really hate this sound and I looking in phonostage (beside everything else) musical softness, tonal none-aggressiveness, space, elegance and grace. I do not need to get form phonostage the analog chic – I have the rest elements of my system to do the necessary thighs. A visitor of my suite suggested in private email that my “system matches best with a front-end that is overly warm and euphonic”. It is might be so in a way but I would not use warm but rather “soft”. Warmth describes tone but softness describes contrast. I would make a parallel with printing photographs during the “old” silver technologies. You may have negative of excessive contrast (Gamma >.065) and use a soft phonographic paper. You might get a reasonably normal final image but the problem is that a trained eye will detect that the negative with excessive contrast has “burned” detail on the max and minimum and minimum optical density. Also the stricture of the film’s grain will be “deferent” not to mention many other thighs…

In my past during my phonographic times I have invented a very interesting and very original developer that did many interesting thing with the stricture of negative, relationship between density and it’s shadow, geometry and border effect of the grain and many other thighs. In addition the developer had developed film to the quite low numbers of Gamma (contrast). The key to handling that contract was use very different type of the light in my enlargers with wish the negative was magnified. I did not use that defused light as usually but rather a super contrast light of the light source that was located in the optical infinity of my enlarger and had it’s geometry infinitely small for a given optical configuration of the enlarger. It produced very different result and demanded very deferent things from the optically system of enlargers but the final result was very gratifying. I feel that in audio I subconsciously do the same and I do tent to have “soft start and strong finish” instead of dealing with opposite. In away I feel that a “correctness” should be approached gradually by “adding” that thing that do not exists instead of “removing” the things that too much.

Gregm, retiring to your post: it would be fun if those JLTi people provide even some very minor specification for their phonostage.  The statements like “we used it with extremely low 0.22mV MC cartridge and it was fine” with mention the dB gain sound too foolish. What was the sensitively of their speakers, gain in this power amp, gain in the preamps if it was used, the size of the room and so on and so on. Not to mention that 0.22mV is not extremely low output for a cartridge but quote an average….

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-01-2006 Post does not mapped to Knowledge Tree
hagtech


Hawaii
Posts 117
Joined on 02-13-2006

Post #: 11
Post ID: 2470
Reply to: 2469
Phonostage and illumination
Interesting.  I remember getting low contrast levels when using the asa 32 film (I think it was pan-x), but huge grey scales.  Sometimes I shot in tri-x just to add drama.  In the end though, my best prints were from the pan-x using nearly monochromatic enlarger illumination and then developing the paper for extraordinary long times.  The subtleties and nuances in the image lived on.  One thing I know is that narrow-banding the illumination gets you better contrast and sharpness through the enlarger lens.  Fewer ghost images, backscatter, and stray rays.

In terms of audio, I think a loss of microdetail results in higher contrast.  Sort of like a CD.  The grey scale is quantized and you can only get so small.  So any phonostage that smears or adds noise or grain tends to mask the subtle shades of music.  There is a loss of resolving power.

So perhaps your front end is not warm, but rather emphasizes resolution and shades of grey.  It is not about thunderous slam and meter-pegging dynamics.  I guess this is the difference between excitement and emotion.  The former is a temporary and fatiguing condition, whereas the latter remains involving and can connect you with the musician.  Perhaps this is a personal choice?  Some audiophiles just want to be entertained (or show off to friends).  I have to admit, sometimes I end up in this category with a need to crank up some heavy metal.

jh
06-01-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 12
Post ID: 2471
Reply to: 2470
Phonostage and Gog know what....

 hagtech wrote:
Interesting.  I remember getting low contrast levels when using the asa 32 film (I think it was pan-x), but huge grey scales.  Sometimes I shot in tri-x just to add drama.  In the end though, my best prints were from the pan-x using nearly monochromatic enlarger illumination and then developing the paper for extraordinary long times.  The subtleties and nuances in the image lived on.  One thing I know is that narrow-banding the illumination gets you better contrast and sharpness through the enlarger lens.  Fewer ghost images, backscatter, and stray rays.

Actually it is not about the getting the low contrast but getting the lowest possible global contrast with maximum (or better to say optimum) frequency- contrast characteristic. Development of the print for a long time is fine, in fact as far as I concern it is absolutely mandatory. I developed prints in 3-4 time over-concentrated develop at height temperature and with excessive amount of antifogging Potassium Bromide.  The key was also in the cooking the negatives in a certain way. The developer that invented was like nothing else. It had 4 developing agents in quite high concentration (Metol, Phenidone, Hydroquinonee, Glycin), supported with large amount of Sodium sulfite and practically with no Sodium Carbonate (believe me or not it was only 2 grammas). The developing agents have own ways to be soluble in concentrated sulfurous acid and I find way to deal with it without the oxidation of the agents. As the result I had very strong primordial soup where the different type of the developing agents in the certain proportion contributed own developing qualities but it all happened at very low pH where nothing can catalyze the development process. The development was quite long: ~ 20 minutes for 50ASA and it was in context of no antifogging ingredients: no benzotriazole and no ionic salts. It leaded to very low contract negative but with a phenomenal inner details, and particularly in the dark. At that time, when I was in middle of my teens I was a creative, artistic minded photographer, did “pure Art”, had expositions… who did not do it in teens?! (The image in the “Knowledge Tree” section is from that time) I loved the “low keys” and was truing to get as lot as possible “information load” in the density that approached the Dmax. The paintings of some mid centuries paintings encourage me but do accomplish it in photography was very-very complex. My 4 developing agents  + some “different” printing method were the solution as I have seen it at that time. Here is one of my typical works from that time.

I was 15-16 at that time and this works is from my cycle about the Odessa’s unique living years. On the screed and via a digital camera it looks like crap bit on the original print there is a lot of “performance” in those dark, “almost black” regions…


 hagtech wrote:
In terms of audio, I think a loss of microdetail results in higher contrast.  Sort of like a CD.  The grey scale is quantized and you can only get so small.  So any phonostage that smears or adds noise or grain tends to mask the subtle shades of music.  There is a loss of resolving power.

I do not think that it is juts about the present of the microdetail but rather how those microdetail related to everything else. I think sound is much more complex then image, although our vision is more perfect multi-angled compressor then our hearing.

 hagtech wrote:
So perhaps your front end is not warm, but rather emphasizes resolution and shades of grey. 

Hm, I would not say “emphasizes resolution” as the resolution is very corrupted word in audio lingo. I would say that I am after in my front end to get maximums identically for each atomic particle of presentation. A note should be very different from another note, as different as possible BUT at the same time it should be related to that “different” note. Everything works in there together: harmonistic, contrast, decays, compressions, phases randomanization and many things… The interesting is that whatever I do with phonocorrector and whatever I try… I in the end return to SU2 and 834PT and realize that it could not be bitten. Playing it is like returning home to a bed of a women you love after spending a weekend with a young and “effective” prostitute….

Rgs,
Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-01-2006 Post does not mapped to Knowledge Tree
hagtech


Hawaii
Posts 117
Joined on 02-13-2006

Post #: 13
Post ID: 2472
Reply to: 2471
Re: God knows color
 Romy the Cat wrote:
Metol, Phenidone, Hydroquinonee, Glycin


Musta been a teenage thing.  I never got around to experimentation with my own chemical formulas.  Damn!  Later on I tried using color negatives and printing with various wavelength illumination (color filters).  The greyscale came out quite nice, but lacked really good blacks.  Here's a crude example:

venice.jpg
06-01-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 14
Post ID: 2473
Reply to: 2472
The miserable Germans: PHONO 2 CI

 hagtech wrote:
Musta been a teenage thing.  I never got around to experimentation with my own chemical formulas. 

Nope, it is nothing to do with teenage thing but rather a cultural thing. In Russia any more or less civilize photographer made own chemicals at that time because whatever was commercially available was garbage. In fact if one know what and how to do then it was possible to take the self-made results light-years further up then the “default” D76…. BTW, the image luck not only referent to black but also the referent to white. Usually shooting in fog it is necessary to add black and white artificially or the prints would look lie they “gray”.

Anyhow, returning back to phonostages, a visitor who observed my frustration with second-type phostage send a link suggesting something that I did not see:

http://www.aqvox.de/phono.html

Did anyone hear it or anyone could bitch regarding what they are saying in their web site? The undefeatable ramble filters look very ugly… Also, I do not get the they mean by self-matching input impedance and why they stopped at 100Ohm?...

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-01-2006 Post does not mapped to Knowledge Tree
Wojtek
Pinckney (MI), United States
Posts 158
Joined on 09-01-2005

Post #: 15
Post ID: 2474
Reply to: 2471
"Everything is illuminated "
Good picture .I don't know why but it reminds me a tonal balance of old movies, maybe because of the subject.
As to the phono stage, Erno Borbely has a J-fet (discrete op-amp) based unit -quiet and MC capable.Use google. It is a kit but I'm sure you can order ready to go PCB which you could mount in your favorite black box ;0)
Rgrds, Wojtek
06-02-2006 Post does not mapped to Knowledge Tree
hagtech


Hawaii
Posts 117
Joined on 02-13-2006

Post #: 16
Post ID: 2475
Reply to: 2474
german currents
"self-matching input impedance "

Aren't they trying to say the input is grounded?  It sounds like they're using the current signal from cart, not voltage.  Like the 47 Labs stuff.  This concept has merit, but I never tried it.  To me, the magnet/coil generator concept works best when creating a voltage.  Same goes for speakers (in reverse).  Although you can drive speakers with a current amplifier.  They're just not designed for such.  Crossovers should be done in series (like a Fried).  Nelson Pass wrote an article in audioXpress discussing some experiments.  In the end, he had to put a parallel resistance across the amplifier to make it sound right.  Sort of right back to where we started (voltage source with some series resistance).

jh
06-02-2006 Post does not mapped to Knowledge Tree
Gregm
Greece
Posts 91
Joined on 02-16-2005

Post #: 17
Post ID: 2477
Reply to: 2469
I very much enjoy your "dramatisations"
 Romy the Cat wrote:

Well, Gregm, obviously you should not take me too literally when I mention the “fallen Chinese satellites”, I slightly dramatized what was sod to me, making it more absurd, but did I? Rgs,
Romy the Cat
And I did catch up on the humour.
I just added some silliness.
Audio people often talk in absurdities in an effort to impress (and justify high prices). Often what they say, taken literally, can have the opposite effect -- or be just plain absurd. Your experience is a case in point:

Romy: "How came that a cheap and small IS-based unit could cost $7K?"
Dealer: "It uses everything from the military"

SO? From that one can assume anything.
Why should one immediately assume that the magic word "military" means +6.500$ on the normal asking price?
Or for that matter that it shouldn't be cheaper (i.e. military surplus is cheaper)? OR, for that matter, that the product uses ic's salvaged from fallen Chinese satellites Smile... It;s just as logical.
06-17-2006 Post does not mapped to Knowledge Tree
Thorsten


United Kingdom
Posts 65
Joined on 12-06-2004

Post #: 18
Post ID: 2536
Reply to: 2464
Any IC-base RIAA corrector should cost $30, with no expiations.
Roman,

> Any IC-base RIAA corrector should cost $30, with no expiations.

Now now.... My "Analogue Addicts Phono Stage" is Op-Amp based and requires at current OEM bugetary pricing in 1000pc lots of $12.25 each. Add Tinfoil & Polystyrene Capacitors for the RIAA EQ, decent resistors and a power supply, plus a J-Fet Headamp a large manufatcurer would probaly need to put in at least $ 50 - 60 in parts (including case). So I'd expect no less than $ 400 Retail.

Sadly $ 400 Op-Amp Phonostages rarely use anything as refined as what I do.... ;-)

http://www.diyaudio.com/forums/showthread.php?s=&postid=942394#post942394

BTW, while by no means up to the perfomance of the LCR RIAA, it's very decent.

Ciao T


"It is to Madame Justice that I dedicate this concerto, in view of the holiday she seems to have taken from these parts." V
06-17-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 19
Post ID: 2538
Reply to: 2536
Re: Any IC-base RIAA corrector....

Tm I ma glad that your “Manhattan project” is over as I was a little scared….

Well, I always thought that I have an open mind and I would not mind to try it. Unfortunately I do not do SS as I afraid of it electrically…

This phonostage of yours, is it available only as a schismatic or is it possible trying this thing? Also, it looks like the "Analogue Addicts Phono Stage" has 40dB gain. It is very insufficient and it should be 70dB at least to handle .2mV cartridges. (I would like to have more all the way up to 80dB ). I know, I know you would suggest getting extra 25dB out of a transformer but it would defeat the purpose of the “second phonostage”. The entire idea of the “second phonostage” is that it should not be real-estate demanding and relatively cheap. If I need to run the cables into a good transformer (that would cost much more and is much larger then the entire “second phonostage” then why do I need a “second phonostage”. I might use with the same sasses a second “first phonostage”.

In the end my comment that any IC-base RIAA corrector should cost $30 was more allegorical then actual. I feel that even $400 Retail is a reason price for a good IC-base RIAA corrector. ($400 Retail means the sub $50 of cost). What I was against in my comment “should cost $30, with no expiations” was that people should not try to sell the IC-base RIAA correctors for $7K-$8K….

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-17-2006 Post does not mapped to Knowledge Tree
Thorsten


United Kingdom
Posts 65
Joined on 12-06-2004

Post #: 20
Post ID: 2542
Reply to: 2538
Re: Any IC-base RIAA corrector....
Roman,

 Romy the Cat wrote:
Tm I ma glad that your “Manhattan project” is over as I was a little scared….

As you well know, it ain't over till the Fat Lady sings.

The "Manhatten Project" will be back.

 Romy the Cat wrote:
This phonostage of yours, is it available only as a schismatic or is it possible trying this thing?

 
I am sure any semi-competent TV repair man or the like can assemble it.

 Romy the Cat wrote:
Also, it looks like the "Analogue Addicts Phono Stage" has 40dB gain. It is very insufficient and it should be 70dB at least to handle .2mV cartridges. (I would like to have more all the way up to 80dB ).

 
The "Moving Magnet" section has 43db gain. It can be increased easily to 56db gain by changing one resistor.

The Headamplifier can have up to 28db gain with some small changes, giving together 84db.

 Romy the Cat wrote:
The entire idea of the “second phonostage” is that it should not be real-estate demanding and relatively cheap.

 
That was my brief exactly.

Ciao T


"It is to Madame Justice that I dedicate this concerto, in view of the holiday she seems to have taken from these parts." V
12-12-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 21
Post ID: 3297
Reply to: 2453
I need a new 7788-7721 (perhabs) phonostage…

I decided to make this post in this thread (you are at a second page of the thread) about the “second-type” phonostage. My needs for a Santa’s bring me a nice “second-type” phonostage really got stronger. If you remember my 7788-7721 tow stages, phonostage with air caps?

http://www.goodsoundclub.com/TreeItem.aspx?postID=41#41

I had been use it for a couple hears as my “second-type” phonostage. It had problem that it has one input. It delivered very much first class performance but…. It died recently. I checks tubes, they are ok and all operational parameter are fine but sound went very dramatically south on this correctors.  I accidentally left the PS of this corrector on with disconnected phonostage. The PS had no bleeder and it was … input choke LCRC. So, instead of 400V it was running I wide open at... should be near 500V… on the 16 caps of 450V/450uF each… Did I tell that I left it like this for 2 weeks?  Ironically none of the caps got shorted but the corrector sound absolutely horrible after this… I do not really wiling to fix it as I would like to have a phonostage with multi-input. Perhaps it would make sense to re-package it in another enclosure with 4 inputs….

The problem is that I do not want to do it anymore. It would be so cool if I fund somebody to whom I might give a fully developed circuit, with parts, instructions and design incisures, some money and then juts pick it up is a couple weeks. I relay hat to build this again. Initially to build that two sated corrector with the magnificent 7788-7721, trying to learn how to get sound out of it was “almost fun” but to build already known circuit is boring like hell… Are anybody out there? Besides making some money I would provide pars for two correctors and you might get for yourself a very-very seriously sound phonostage… How else I could solicit you? How about that I promise do not insult you on my sire for the next 3 years? :-)

The only hesitation I might have is that my 7788-7721 is 66dB gain, not enough…. Perish I would put one more gain stag in there…. Anyhow, any offers and proposals would be considered….
 
Rgs,
Romy the caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-12-2006 Post does not mapped to Knowledge Tree
Wojtek
Pinckney (MI), United States
Posts 158
Joined on 09-01-2005

Post #: 22
Post ID: 3298
Reply to: 3297
Well...
If you're willing to send it to the deep Midwest (Detroit) I could assemble the circuit for you and ship it back. Regards, Wojtek
12-13-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 23
Post ID: 3301
Reply to: 3298
That pain in ass Cat

I have seen what kind cars Detroit makes…

I kidding. Thanks, Wojteck, I will consider it. I have to visualize what it will be. I know that it will be >80gain and it will be useing my long-time-ago-prepared capacitors but there are some problems that I need to address in the design before everything will be clear. This corrector will be slightly different then the previous 7788-7721 not to mention that dispute of the elephant size of some elements I would like to make it very-very compact. I need to sleep with some ideas for a couple weeks before I clearly learn what exactly I need. Unfortunately it might be not just “assembling” but assembling perusing some very isocratic (considering the size) objectives. I might be a pain in ass…. I can clearly see it even now….

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
12-14-2006 Post does not mapped to Knowledge Tree
Wojtek
Pinckney (MI), United States
Posts 158
Joined on 09-01-2005

Post #: 24
Post ID: 3302
Reply to: 3301
It looks like you could have some "fun" by doing it yourself....
I drive Honda (like most immigrants) and would not consider having a domestic car. Looking at your Melquiades pics I think I can match west coast's standards ;0) but you have to clearly know what you want as I won't be able (looking at your objectives) to help with development of the circuit.Regards, Wojtek
12-14-2006 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 25
Post ID: 3303
Reply to: 3297
Finding space for my 'second' phonocorrector.

I spent today a couple hours trying to resolve a quantity with my analog setup. As you remember in the mid of this thread:

http://www.goodsoundclub.com/TreeItem.aspx?postID=2015#2015

I was proud that I eventually found a good configuration for my Micro-Seiki Double Deck TT. However, I had no space for a second phonostage on the upper deck and to run all cartridge cables to lower deck was not that I would like to do.  Since I am contemplation now a “final” second phonostage that would be able to run all my 5 arms I really wanted to locate it as close as possible to TT. However, since the corrector it will be around vacuum capacitors and it will be quite large for two stages deign the quantity was to find an extra space on my top shelf, with the reach of tonearms cables. After a few hours of mingling with various configurations I came across the following:

I like what I got a lot. My main reference arm with its reference corrector is unaffected and on left from my main phonocorrector there is plenty of space to put a lager “second” phonostage for the rest of the arms. Now, since the space for the second phonostage is not a factor I might go crazy and come up with something “pushy” – who know, perhaps with its 80dB on two stages it will be able to “violate” the sound of the “first phonostage”…

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
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