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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Cosmos"] Anyway, as the description on our site on second paragraph says, the third 6C33 located at the back, is used as the pass element of the regulator (controlled by solid state circuitry) providing 220V with 100uV of random noise &a...
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[quote user="ml8"]So sometimes i just wonder why do you need 6C33C at all, with your high-sensitive speakers.[/quote]
This thread is a derivation of the “5 Channel Version of Melquiades” thread:
http://www.GoodSoundClub.com/TreeItem.aspx?PostID=406...
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[quote user="drdna"] I think this 2A3 must have a specific set-up to sound its best. You have not found it yet. To begin with and familiarize yourself with the sound of it, I suggest sticking with the topology that has been tested by amplifier design...
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Ok, I made some further experiments driving this time my S2 driver from Milq DH DSET. The hell of the sensitively - it was too much. So, I went for 4:1 inner-stage ratio. The result was very successful and the amp looks like was able to get more...
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nl,
[quote user="nl"] I offered to be of assistance, as I have a little experience in these matters, but assistance is not appreciated so I will be leaving the Kingdom of Romy for more productive environments. [/quote]
where did this come from are ...
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I received a comment form people who reportedly well-familiar with using the high-frequency high gain tubes. They suggested me that the resistor between screen and grid (R23) might be eliminated and that would bring some benefits. It very much might ...
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N-set, yes, I did not have any single 6E5P or 6E6P filed on me since it was accepted to operation. About your circuit – you need to talk perhaps with Dima or with others about it. I am absolutely not familiar with PP amps, I do not even understand ho...
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[quote user="Romy the Cat"] Spending some time listening carefully my new setup after fine-calibration I recognize some inaccuracies in my previous comments and some mistakes of my original objectives. Here are some observations I would like to m...
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Hi! I have got these 6E6P tubes from Georgia (in the former USSR, not the home of sweet potato pie). I have removed them all from their protective glass packaging, but I am unsure of how next to hook them up.Adrian...
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I still would hesitant to short the scene and anode and it would require a very sever control of the tubes. The problem is that it would be necessary to do not only then they new (it not too difficult to put then before a fast scope and to see if the...
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[quote user="Romy the Cat"] The HF Range “F” channel: The 6E6P-DR at 30mA connected at tetrode. The filter is second order with Sowter 9858 Pultec MEQ-5 EQ Inductor 420/277/145/108/61/34 mH) and variable air cap. The variable inductance and capacitan...
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I do not have a lot of equipment that uses vacuum tubes I have a phonostage and power amp that are tube based. The phonostage used 12AX7 that in there from 1999 and I think they will survive me. The power amp use gas tube 0A2, the output triodes 6C33...
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Hi Romy,I've been reading the 6e6p-dr datasheet and it seems as though pin 8 (a shield) is recommended to be tied to a lower negative voltage than the tube cathode. Have you bothered or experimented with this? This is no problem in the DHT Channel ...
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I got home today, power up the payback and played some bootlegs of Australian festivals that Kostas Metaxas sent me another day. I paid attention that the sound was strange it was too hard atop. That was something new. I put in my player the CDs...
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Ok, this is probably the most important section as besides all positive changes that PP2000 does to sound it does this one, the one that I call “softness”, and the values of this “softness” have to properly understood and interpreted.
The “softness”...
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Anthony, I grounded in my
amp it in order the shield was not hanging there free. You certainly must NOT
leave it disconnected and you do need to tie to something. Generally biasing of
these electrostatic fields shields is very murky territory. The...
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Well, I spent today a number of hours trying to advance my observations regarding abilities of the one-stage Melquiades. It was quite interesting. Thankfully the electivity today was way better during the second part of day. I loaded the 6E6P heavier...
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OK, it took for a while but at this point I have nailed down all design aspects of the new 6-channels Super Milq, and particularly its input stage. I have listen and evaluated all solutions that will be implemented in there; selected, appraised and o...
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Ok, I do not know what it was: was it DHT, was it 300B, was it some other specifics of this given amp or whatever… but those two aspects that I named: intentional density of colors and randomness of pace are something that I would like to exercise in...
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Interesting….. It is interesting to think about the relational of Melquiades slow take-up. I think that major contributing factor is that guy who calls himself Romy the Cat. Really, I think it’s it. The people who are capable to build amplifiers more...
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Still using 6E6P for driver? Can you just scrub some gain with lower plate values without making such a steep signal path filter? You'll still be forced to tailor your bandwidth, of course.Would it help to split the roll-off curve between the s...
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Since I went single-stage Milq with output transformer on the Water Drop’s side I am witnessing an interesting phenomenon. When the amp is cold and juts tuned on then during the first 3-5 minutes (in addtion to the 2.5 minutes of start up procedures)...
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Over the course of the last year I have been gently harassing my transformers-savvy surrounding trying to evangelize them into amorphous core. They stubbornly and perhaps stupidly resist. Some of them not…
During the last few months I was tal...
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Here is the general specification for the parts that I used. The selection of the parts implies some liberty of course. It will be your amp after all, not mine - do whatever you wish. In some case when I feel that requirement is critical I will stres...
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Options are limited here... looking at the schematic, you're sorta pinned in by the biasing topology used. One typical method would be to use a resistor divider network at the input grid to the 6E6P. Problem is, this results in a huge bias offset. By...
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[quote user="Romy the Cat"] It is not a the thread about Allnic but LCR RIAA correctors, still there was something expressed in here about the Allnic LCR phonocorrector… and I feel bad about it. It is not that I don’t think that Allnic LCR phono...
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[quote user="Paul S"] Didn't you first become aware of MF "problems" when you got everything else working better via the PP2000, and the MF wound up dropping back to weak sister status with respect to system-wide PP2000 benefits? [/quote] The PP2000 ...
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With the project of the 6-chennal Super Melquiades is about to hit its final stage I might to review my summarizing observations. The 6-chennals Macondo is driven by 6-chennals dedicated DSET Melquiades, that looks like properly orgies for the job. T...
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This subject does not bother me too aggressively as I recognize absolutely no sonic demands or listening temptations to change anything in my playback. However, there is a theoretical and conceptual curiosity on my part and I would like to learn what...
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So, looking at the schematic below......I have a few more questions25 turn pot in the filament supply. For the life of me I can't source a 25 turn pot. The 10 turn Bourns 3590 is the closest I can find. Do I need to keep looking for a more sensiti...
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