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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 a very good article about the development tube types in the 1920 and the birth of my Telefunken RE-604
http://www.goodsoundclub.com/PDF/ProliferationTubeTypes.pdf
Then, here is very cool later but still old advertising from Telefu...
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[quote user="twogoodears"] Actually a N.O.S. EC-8020 "diamond" is worth EUR 500+ ea., an STC 3A7167M is fetching EUR 750+ ea. (I own one N.O.S. sampler with original carton box, bought by chance for cheap, years ago) and WE 437A is at "only" EUR ...
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[quote user="Romy the Cat"] your diver might be a very good MF diver but it does not go to region where the “tizzing” live.[/quote]You may not believe me, but the driver start to roll off (very smoothly) after 14kHz and at 20kHz is at -6dB. I intent...
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[quote user="Romy the Cat"]I do use some vintage elements in my playback but I use them purposefully. I recognize their strengths and weaknesses and I capitalize on the strengths only. I think this is the only sane approach I see; when some vintage ...
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I was listrening to Hoenniger/Bach Suites yesterday and I don't know which exact instrument he plays for these 1973 German Telefunken recordings (stereo LPs), but that damn cello of his was just ripping the room to shreds, with its bass notes as powe...
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Great listening session today. Nothing too demanding, but some seminal jazz performances were included.Since the Telefunken tubes I was trying are well-used, I stuck in some 60s Amperex SQs, just to check for any possible changes.&nbs...
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Dear Romy,
I have stopped by your site from time to time over the last year to see what interesting things have been going on. I generally do not say much, however I finally decided it was time to register and add a few comments to this d...
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When I was in discussion with Thorsten I actually had the low gm Telefunken EF 804S in mind. This was a valve specially developed for their studio microphone preamplifiers, designed to have minimum self noise so probably the best thermionic amplifyin...
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I have seen some people built 834P with alternative input and output tubes but I never heard them. I personally tried all imaginable 12AX7-type tubes (AZ, AT, AU, 6N2P and many others) in 834P. Some other triodes were king of better “here and there” ...
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I'm a phono moron, but having had several phono preamps, I think I can understand what finds Romy right in the EAR 834P, which I love. I'm not as skilled and crazy as to try to make all the Thorsten mods in it by myself, but I've tried some tube swap...
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…and I hope you did put your ET-703 tweeter in a time aligned position, did you?
The AD1 tube was one of those original “better sounding” triodes. I have a quite few of them; in Telefunken 1936-139 radios (I have 4 or 5 of those radios them in my st...
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Jim, I do not know what to say: I never experienced any nose problem with it. A few years ago I built 2 mono phonocorrectors with 7788 at input as a pentode both of them were just nice and quiet and did not give me any problems in noise department. T...
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I have seen those old Telefunken, Siemens and some other 4” cone direct radiation tweeters, but I never tried them. I do not know thier signature and I do not know thier characteristics. The reason why I never cared about them, although I might be wr...
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[quote user="Paul S"]Romy, I have for some time called this phenomenon the "necessary roughness", and one of the things I liked (loved, actually) about Cogent's main field coil was that it did this very well indeed over about 2 octaves; in fact, it w...
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I'm learning a lot on this Forum: lotta quoting and tips about the Great Masters - Beethoven, Mahler, Rachmaninov, Prokofiev, Mussorgsky and the Great Conductors Legacy: Toscanini, Walter, Furtwangler, Barbirolli, Boult...... the musical topics - alw...
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Thanks, Roman... I strangely (?!?) feel me like a schoolboy at his first primary schoolday... virtually ALL my (limited) audio knowledge, vanished... and I'm dealing with brand-new problems, like a crossover with fixed slopes and cut-off frequencies ...
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I have listened to EAR DAC 4 in two systems.Specification:BNC/AES SPDIF input , no serious jitter rejection , no Digital processing , no op-amp , wolfson DAC 8741 , transformer coupled ECC88 output tube stage (5v output with analog volume control to ...
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Hello Roman,Hola from Hong Kong! How are you? Haven't been here for long time. I have a question at the back of my mine for long time, and it may have been covered elsewhete in your blog before. I am asking it here but do point me to the thread if it...
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[quote user="twogoodears"] Yes Roman... I feel pretty like I entered a sort of "cul de sac", tube-wise... I contacted, few months ago, Western Electric USA and they told me that, at USD 750 ea. they have "plenty" of N.O.S. WE 437A... I've been ab...
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[quote user="doug s."]re: my tu-x1, yes, it's a fine sounding beast. unfortunately, i cannot give you any info re: how it sounded before mods; when i bought it, it was japan-spec - 76-90mhz tuning band, 50us deemphasis and 100v. i had it ...
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[quote user="el`Ol"]I don´t know whether the audio industry`s products are so sophisticatet that they need mathematical steam hammers to improve them. In a German forum there is a discussion about a diploma work from the TU Berlin where the student f...
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[quote user="Romy the Cat"]I have to admit that I have written a few pieces of writing about my experiences with YO186 but I withhold to post it as I do not know if it might valuable for anybody. It looks like no one use YO186 on West. There are ...
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I bought those tweeters for Be Yamamura (second hand from Paul at Wembly Loudspeakers, in London) I also took Be to Heathrow Airport to take a plane to Brazil to install one of his truly superb VT4c stereo amps! It was the morning of a great wind ...
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I suppose this further erodes my "credibility" regarding the "tube sockets" hysteria, but it is what it is, so here goes:Today I finally had the right combination of alone time and motivation (not to mention great electricity) and I got around to swa...
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Somebody posted at Symphonyshare a great recording that I been enjoying for 2 days. It is Eugen Jochum leads Vienna Philharmonic Orchestra. Among all the Bruckner 7 that Jochum recorded I think this is the earliest I hears and it is very very goo...
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I am looking at the reports on my site’s traffic and see that the site has a dozen visitors form Czechoslovakia. I would like to take advantage of it and ask you guys to tell us about your Czech Audio.
I love your country, was there and know a lot a...
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Years ago, the two different systems in which I heard RCA 1428s - in a fairly big warehouse and crammed into a basement listening room - used giant RCA multi-cell horns in combination with giant Ubangi bass bins, passive crossovers and vintage WE or ...
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Romy, that's sort of a feedback I was hoping for, thanks. Ok, I see the point, with the feedback and R3 resistors. The last loads the loop. I have now there 1W Dale RN65D, guess Z-foils with their 0.25W dissipation won't work.
A...
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We have tested live recordings against live sound, a recording of a jazz singer was done on Reel tape on an Ampex ATR modded machine with Fluxmagnetics heads etc. The microphone used was the legendary Telefunken stereo tube mic. no post producti...
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Hi Roman, hi all...... very interesting topic... I recently made the contact between Josh and Klaus and his Goto system... I experienced Klaus' system three times and also if someway blaming his choices about using only and exclusively "liquid music"...
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