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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Here is the cold, hard truth, staring us in the face, that this part has to be right before any of the subsequent embelishments matter.Although I have blabbed at length about the silliness of the "average" VTA setting, and I have gone to some len...
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[quote user="Wojtek"]application far more sensitive than simple line linestage and in addition to that ,that pre is percived to be colored and syrupy tick. Are you trying to cover up that harsh and cruel sound you're talking about Could y...
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[quote user="drdna"]What specific objectives did the air caps address in the circuit? You refer to the tempted virtue sound but I am unsure as to the goals that you were trying to achieve with this circuit alteration?[/quote]Adrian,
I what wro...
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OK, you need to find out if the problem is in phonostage on in TT as the problem was “spanning several turntables and arms”. You might run your phonostage from anti-RIAA filter from your CD player:
http://www.hagtech.com/iriaa.html
or use one of ma...
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This sounds like an interesting idea, especially since it eliminates the RIAA components. Eliminating components is usually a good thing. However, at the "entry level" price of $8,000, I don't think I will be buying one any time soon.
Adrian...
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Romy,I might be confused with the passive and active, but from my understanding you prefer your active 834PT to the passive RC network and passive LCR networks. You also prefer the passive LCR to the passive RC. So 834PT>LCR>RC.If I got it righ...
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All records, particularly from good period, were recorded at different equalization. Even the records that were RIAA marked were in fact WAY off…How to deal with it? Running a feedback to high impedance, in the way how it made in EAR 384P, permited u...
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Thanks for the comments Romy. Would appreciate pointing out where the schematic is for the 7788 phono preamp or even better your friend´s 7788 mic preamp schematic. I can use the phono stage circuit minus the RIAA as a starter and th...
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So I decided to try some of the mods mentioned to my semi-recent 834p w/ MC step-ups. It all started with C1 and C7...but then i got into RIAA, upgraded diodes and filter caps. Well, everything should be just stellar on paper but...now I have a hum t...
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18 dB is a heck of a lot of energy to expend on feedback, but op amps do use tons of it. Any of those guys in there?More troubling is the thought that the energy could be lost to some sort of "proprietary curve", like a digital "RIAA" or something,...
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Paul,I haven't done much audio in the past 1,5 year. The main reason is a war in my motherland which got me pretty out of balance,but I'm coming slowly back. To try the Fr7, I made a slate/lead tower for the SME3012 caring it. Now I need to convince...
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I ripped my Cd player (to old to mention ) output stage and replaced it with SS J-fet phono preamp .I took RIaa components out .The dac puts out only 20mV so the MM stage with separate PSU and discrete J-fet regulators seems adequte for the job. Whol...
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Hm, I kind of did not have time to continue this thread, probably I will. My initial idea was to publish my observation about all commercial and none-commercial phonocorrectors I have heard and to describe their problems. Perhaps I will return to it ...
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It's ironic that some of us have spent a lot of time and effort building a vinyl playback system that clearly reveals the differences in the recording curves. How sweet would it be to twist an otherwise-non-intrusive knob to set the playback curve co...
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Perhaps I should have mentioned before that the K&K is another spin-off of the well-received Arthur Loesch RIAA network. Also, the K&K's gain scheme is based on "classic" microphone circuits. While I am not say...
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It is not about the LCR phono as a concept – many companies manufacture the RIAA LCR constant impedance networks: Lundahl, Tango, S&B, Da Vinci, A-D, your Allnic looks like dose them as well. The LCR filter is not complex and any manufacturing ho...
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N-set, if you have an unused circuit in the apt., then its neutral may be an acceptable ground path (neutral stays "on" even when breaker is "off"...).Re, the phono calibration, I have expounded the SRA at length in the "Vinyl Ceremonies" thread. As ...
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[quote user="JJ Triode"]Romy,Try running the left and right signals from the stereo arms, one at a time, into the known-good mono phonocorrector. If the problem is not present then you know the stereo corrector is to blame.Are both left and right ch...
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It turned out that Rowen has the US rep - Steven Swabacker from Hi Sierra Hi-Fi. The Sierra Hi-Fi has web site:
http://hisierrahifi.com/index.html
The site has not a lot of information about the Rowen RIAA corrector b...
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"ASR do not use the regular ICs but the ICs that they removed form the demilitarized Russian nuclear missiles console and fallen Chinese satellites" :) ...which means that they use cheap, used ICs. So, the dealer has a better margin & can di...
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[quote user="AlexBerger"]I tried Amperex ECC83 "Bugle Boy". They sounded bad in the EAR RIAA. I like more modern Amperex ECC83, Holland made with orange-red prints.[/quote]Yes, the Amperex "Bugle Boy" are horrible tubes. They have huge publicity amon...
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Paul, after a month of vacations I've tried you advice:[quote user="Paul S"]If you can do it, try isolating both cases/chasses from your "ground plane(s)". Use one inclusive "ground plane" for both the PS and the gain/RIAA sections, and ground this "...
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Points about the self-sound of the PH-77 are well taken, not that I'll be spending 8K on anything any time soon, regardless of its "value".My own K&K phono stage is totally Spartan, just to avoid all the circuitry that typically facilitates the s...
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But why would you consider brass connectors because of 95% of boutique RCA if the idea is to wind up with the best signal path?Probably, you will not use continuous wire from the cartridge coil, and you will probably not solder but use some sort of c...
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http://app.audiogon.com/listings/omnigon-full-function-tube-preamplifier-phonostage
Looks like a serious effort that has been kicking around for a while.What tubes are used? Are they twin triode, like 12AX7 or - more likely - 6922? Both t...
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I am with you on this one. I am also very suspicious of gigantic, 4-chassis phono stages if only because I just wonder why the need for all those damn noisy parts, along with concommitment connections?So it really pisses me off to admit that th...
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Rooting around for manufacturers' operating curve/info on 6922s I came across a short paper I got years ago from electronics genius Roger A. Modjeski. In a nutshell, RM talked about internal variables in tubes that affect their electrical charac...
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Robin, your point is well taken, but I don't think they are trying to circumvent the laws of physics here. I did not read it yet, but Alexandre did provide a link that gets one in the vicinity of an explanation:https://www.ds-audio-w.biz/wp-content/u...
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Interning, I never heard about them. Might I ask you what triodes were used in this thing, how many stages and what “most advanced RIAA available” the unit use? I understand that it is passive EQ but what is so unique about it? Also, if it might act ...
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It is exactly what the “End of Life” means – you know all necessary answers and have no needs to prove anything to anyone. I heard from you before that you do not like 834PT’s sound, I presume that it was ether bad 834PT, or extraordinary-horrible st...
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