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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="rafaroxlm"]As you may know the 7788 is a high transconductance pentode which should in theory be able to give higher audio resolution than say 12AX7, 6072 tubes in tube mic pre designs. On search here the 7788 was mention...
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[quote user="serenechaos"]At first I plan to power the thing SET, with a known, existing amp (a triode wired EL84) which I've already built and know the Sound. It is not bad, but a little "warm" sounding (second harmonics, and is low powe...
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Yesterday I got two emails asking me about Lamm ML3. I replied as I usually do, saying that I that I do not practice in satisfaction in audio-consumer curiosity. Still, it made me to think again about a hypothetic amp around GM-70.I am not a fa...
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It turned out that I made my Melquiadenisation with 6C33C. Not practically because it is good or bad tube. The choose of 6C33C was partially accidental: in the beginning I was trying to make an amp that would be able to work in multi-app configuratio...
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Since I am now in the Super Zarathustra conceptualization mode am paying attention to the hybrids out there.
http://www.goodsoundclub.com/TreeItem.aspx?postID=2362
I still do not see any interesting Class “A” hybrids but it looks like regular AB hy...
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[quote user="floobydust"]As Romy pointed out, having high gain is not the same as power. If you're only barely cracking the volume control on your amplifier or preamplifier then it should be obvious that you have more gain than you need. If you're p...
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[quote user="JJ Triode"]I'm sorry to say it, but I think Amy's large rug is too large. A smaller one, or better yet, two much smaller ones with some bare floor in between, is what I would play with.I also think you should recalibrate the channel lev...
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[quote user="Merlin"] If there's one thing I hate about internet forums it's people postulating about sounic characteristics and possible failing in equipment they have never heard. [/quote]
Merlin, I was under impression that it is very obvious tha...
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[QUOTE]I do not know that HP use to tell in 80s[/QUOTE]I know you don't, that's why I seriously suggest you check it out.The logic "musical intention of composer/conductor"-->minute analysis of 3D representation of orchestra performance in view of...
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The Czech Republic-based Emission Labs Company introduced their new replica of famed AD-1 Triodehttp://www.emissionlabs.com/html/club/labreport.htm
It looks like Yamamoto, Japanese amplifier manufactures has made an amp with this tube: A-06Shttp://w...
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[quote user="JJ Triode"] It is about the bogus notion of choosing colored components such as to try to make the colorations cancel. [/quote]
A correction would need to be offer. It is not “cancel” but to mask out and only in context of ignorant list...
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Hi Dima,Thanks for your comments; please forgive the chaos of what follows as I have to rush!
Agreed on all counts - the dc bias point would need adjustment and monitoring; I supposse it depends on how stable the electricity is from the wall; anothe...
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Hi,
I have a phono stage from the Korean company Silvaweld that uses the 5651 tube in the power supply as a voltage reference. It also is using a Russian 6C19Pi tube along with EF86 pentode as the high voltage regulator. The rectifier is...
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One of the reasons I no longer use a tube tester. They make a measurement at a specific target operating point(s). You don't really know what it is, so what are the chances they will be close to your actual circuit operating point? So choosing a clo...
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Hi!Sorry for not spotting this thread before. I'm the member of this forum and I read it from time to time. I don't know what do you mean with "he is from diyaudio.com site"? I'm member of a few formums and newsgroups but I wouldn't say that I'm from...
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I completely agree with what you said. To tell you the truth I was already very satisfied with sound, but I just wanted to make that powerful triode amplifier - I really don't need it. But it's nice to have it. As you know in this hobby it's not so m...
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JJ, I not only loved the bass from the ML2 (SETs) but I loved the bass from the little Wright WPA 3.5 SETs! In fact, I loved everything about those amps, as long as they were "comfortable". Too bad that wasn't FR, etc. with my speakers...in my own ...
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[quote user="Romy the Cat"]I was thinking about this: how come that driving 6C33C (in fact driving anything one can imagine) the 6E5P was very fine but driving 2A3 it was dull like hell. I opened the amp and tested all – everything was perfect but th...
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This thread has been pretty interesting overall. I've read most of it and would at least like to provide some feedback on the technical side of designing with the 45 and 2A3 DHTs... at least from my personal experience. A few years back I decid...
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Romy, don't be so sure the amp is 2-stage. The ECC99 is a twin triode (mu=22, Rp around 2k) so the two sections could be cascaded, paralleled or the second section used as a CF or several other possible topologies.
Their 2A3 is rated up to 40W pl...
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First, Adrian, Thanks for your feedback on the newer designed 2A3 tubes... very interesting. I've looked at all 3 of these brands before but have not as of yet purchased any (I have a large collection of 45 and 2A3 of various NOS US brands...
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Sorry Romy, i can't tell you about life longevity of 6E5P in my amp 'cause i'm not using them there anymore :)For my speakers two-stage SE sounded much nicer, more balanced and clear with more volume. Well at least it was easy to predict, considering...
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[quote user="op.9"]I now run my 'tweeter' amp 1st order high pass at 2200hz (driving BMS 4540nd in 1500hz leCleach horn) so my impressions might have some bearing on Romy's new amps. I was playing around with operating points and components in my sin...
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Yes , I told Romy about this funny idea , which is quite simple of course - to make a simple SRPP stage on special hi-voltage tubes , powered with high voltage supply ( 10000 V , for example ) and drive the electrostat panel directly from the output ...
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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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[quote user="vuki"] To tell you the truth I was already very satisfied with sound, but I just wanted to make that powerful triode amplifier - I really don't need it. But it's nice to have it. As you know in this hobby it's not so much about the end o...
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This thread has triggered some old stupid sentiments. Feel free to remove this post if irrelevant. I've been thinking how to rationalize my old design in the present context and make it less idiotic.First, know the enemy. I don't know the enemy. I as...
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[quote user="JJ Triode"]Yo-yo Ma will be playing Bach solo cello suites for 2.5 hours starting in a few minutes (noon Pacific Daylight Time in North America.) He has a YouTube channel and it is also carried on the website kusc.org and maybe elsewhere...
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[quote user="JJ Triode"]… I am still a bit concerned how the girl-with-string-bass will go over in your house, but Robbins himself said he is tired of that song….[/quote]JJ, I know what you are taking about and references to “that song” is something ...
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Hmmm - the whole LCR thing, I don't like the idea. I'll admit to having no experience of it, but in engineering terms, it just gives you a constant impedance filter. The EQ is still done by caps essentially, far as I can tell. I see the wh...
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