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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="Paul S"] What are you using for pre-amp chores?
Have you tried phono sources yet?[/quote]
I do not use analog for now, since my preamp is being rebuilt, I hope I will have it back this week. Well, I was listening today the life MET’s b...
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JJ,
yes, I got Hal-O dampers a few years ago and I do use them but it would require more say then just “I use” them.
I have them for a long time. I initially bought then to use with 7788 tubes that I am employing as an input tubes in my phonocorr...
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[quote user="Brian Clark"]I like it so much that I intend to build an "enhanced" copy a la Thorsten/Carsten for reference (and enjoyment!) before investigating the high Gm alternative (D3a + E55L or E810F )[/quote]Brian, It is hard to say. I use my b...
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The two stages 7788-7721 phonostge can go at near 70dB and it were what I was intended to put in that Chinese chassis. I would like 6-10db more. A transformer? A semiconductor gain stage? A third tube stage? I do not know…
Actually reticently, two s...
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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 t...
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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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Thanks, Keith and Montepilot.
I did have my 7788-7721 phonostage with LCR filter and I always liked it, pay attention - it was 68dB gains with just two stages and with NO step-up transformer. Allnic Phono is 3 stages with step-up transformer...
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I have seen people use 12AU7, 12AT7, the circuitry might be tweaked and it will accept anything. I use a 7025 in second stage (look into the linked thread “Once more unto the phonostage dear friend!”). Hey, I even used a transistor as follower! I kno...
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[quote user="Paul Costa"]I have a PDF file of the manual if it interests you to read it, I can email it to you. The unit weighs 80lbs, uses 6 6sn7's. What I found a little odd was the spec for the phono is it says : MM Phono Stage Gain: 64 dB at 1 kH...
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Jim,
I do not know if you still fighting with 7788 noise but let me tell you something: those Allnic shock-absorbing tube socket adapters are insultingly affective. I act lay made some measurements and I was VERY surprised how much the Absorb-GEL ea...
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Since the “Hunan Style” phonostage-chasses is coming to me and will host my 7788-7721 (64dB) corrector (that I love) I was wondering where I can get an extra 10-20dB to run .2mV cartridges. You mentioned the Lundahl “amorphous core” transformers...
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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 r...
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Well, there are many full-function preamps. It is a common tendency nowadays to make an add-in board with phonocorrector to a line-function preamps. Recently even the full blown tube preamps use the j-fet phono-boards.
Interesting that I would like...
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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 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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Hi Romy,I think you may be struggling to get 10-12db of gain out of a spud amp (the term is a play on "one tuber").... May just about get it with 6C45.... remember you will be stepping down something like 12 to 18:1 on the OPT.best case: 10db require...
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A few posts above, actually inn the install post of the thread, I have metioned the Absorb-GEL device. Well, I got them yesterday. They are expansive, something about 70 European dollars per pair, pleasantly made, reasonably designed and it looks lik...
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[quote user="Thorsten"]I have kept the 600R arrangement, but I cleaned up the circuit a lot. The new stuff was posted over at the AudioAsylum, not a place you are terribly fond of. If you still have the Phonostage you build it might be worth rolling ...
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Actually I use Koussevitzky 1949 version of Tchaikovsky’s IV (first movement) to assess my mono analog. There is not doubts in my mind that any more or less serious records enthuses much have a dedicated mono cartridge, preferably permanently install...
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Hello,
While the question was addressed to Romy, may I be allowed to barge in :-)?...
A question before anything: do you feed the 7788 DC or AC on the filament?
Many tubes are perfectly able to oscillate mechanically on 1KHz--20KHz range, ...
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[quote user="Romy the Cat"]
Perrew,I do not know if you use sarcasm in there but Lamm LP2 is not my bellowed phonostage. In fact I am one of the very few people whop do not like it at all. How much in what I do not like in Lamm LP2’s MM section com...
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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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Perrew,
I do not know if you use sarcasm in there but Lamm LP2 is not my bellowed phonostage. In fact I am one of the very few people whop do not like it at all. How much in what I do not like in Lamm LP2’s MM section come from the WE417 tubes...
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OK, here are some follow up thoughts after the completion of the project. I am sure I will burn it for a month or so. I think everything will be fine, I do not expect any issuers technical or sonic. The way how the entrance to the corrector done it i...
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If you read the post:
http://www.goodsoundclub.com/TreeItem.aspx?postID=41#41
then you know that I am happily employ an interesting 65dB-gain, 7788-7721 two stages phonocorrector designed and build with air capacitors. A few days ago when I eventu...
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I do not know if Russians still make them. I do not think they do as they hardly manufacture anything nowadays. I presume that there a large stock of them in Russia as Victor Khomenko (from BAT) told that during the peak of the 6C33C production Russi...
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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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T, ‘m glad to see you around. Your position is quite educational although not an unproblematic. I do not agree with some of the points you brought up (I mean that 103-is very low compliance cartridge - 5x10-6 cm/dyne (except D and M), disagree with ...
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[quote user="KOTriode"] The Melquiades give me inspiration to build this 6C33C amplifier. It's on a stereo chassis that has few unique features - Vacuum tube rectifier separately for Input/Driver and Output tubes. - Regulator using the same tube ...
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[quote user="drdna"]This is sort of a sideways answer to this question, but having used power supplies with vacuum and soild state rectification, I also played with Allen Wright's SuperReg circuit and I really liked the way it sounded. A more stable ...
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