|
|
| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
|
|
 |
|
|
|
|
|
[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...
|
|
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...
|
|
[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...
|
|
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...
|
|
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...
|
|
[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...
|
|
So, it will be a single-ended triode amp and in future possible DSET, right? YesOK, but you need to understand that you will pay the “minimum proximity” penalty for this. Yes, this is something Jeffery warned me about, "Romy has that vertical thing r...
|
|
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...
|
|
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 powered for low frequenci...
|
|
[quote user="Romy the Cat"]I do not know how the battery operation – I never was too warn with this idea but to have a small Solid State single-ended amp with put transformer sounds to me very nice. I wonder if anyone looks in this direction. I do no...
|
|
[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...
|
|
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...
|
|
[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...
|
|
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...
|
|
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...
|
|
[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...
|
|
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...
|
|
Lamm juts announced the “Wold Premier of Lamm ML3 Signature single-ended triode moonoblocks” at CES 2008. It will be paired with large Wilsons in 2500sq feet room. To drive 95dB sensitive speaker with 32W in 2500sq feet is a sizable task but it will ...
|
|
[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...
|
|
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...
|
|
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...
|
|
"You need to realise that the physically larger a Transformer becomes the narrower the available bandwidth for a given construction. Due to the need to handle a lot of "magnetic bias" SE Output transformers become very large, physicall...
|
|
[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...
|
|
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...
|
|
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...
|
|
Romy, I did some models using a 400V supply and a 6K OPT load. It's easy to get 4 watts output in this configuration, but using a 2K cathode resistor results in higher distortion and a weak transfer curve. Plate dissipation is around 11 wa...
|
|
Romy, As you're planning to run a 6K load, you can run less current without the transfer curve suffering as much. So, another shot at some numbers.... rather than use a RC setup to drop the voltage, Hammond (not my favorite) make an open f...
|
|
Yes, the last 3 pics are of the "dead" 2A3. Saying it warms up could mean two things... it literally gets warm and nothing else as it may have leaked air. Or it could mean the filament lights up (and assumes getter flashing still intact which i...
|
|
[quote user="Romy the Cat"]In my upcoming DH Milq MF DSET I will have an Innerstage transformer and output transformer. The loading of output tube has known effect to harmonics vs. transients, it is know, it is predicable and it is manageable. The In...
|
|
Romy, I have some (strong) opinions on DHTs concerning filament supplies versus specific tube types. For virtually ANY 45 triode, AC is my preferred option. Still, not all 45 triodes will be acceptable for my use, hence weeding thru many of them to ...
|
|
|
|
|
All context of this site except the Forum's posts
Copyright © Roman Bessnow 2004-2024
All messages within the Site’s Forum Copyright © by
authors of the posts
|
|
Last 24-hours posts: |
2 |
|
 |
|
|
Total human visitors: |
42,940,873 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Froberger, Johann Jacob (1»
|
|
Böhm, Georg (2 Septem»
|
|
Goldmark, Carl (18 May 183»
|
|
Zweers, Bernard (18 May 18»
|
|
Mahler, Gustav (7 July 186»
|
|
Albéniz, Isaac (29 Ma»
|
|
Sauguet, Henri (18 May 190»
|
|
Zeisl, Eric(h) (18 May 190»
|
|
Anderson, Leroy (29 June 1»
|
|
van de Woestijne, David (1»
|
|
Pickenhayn, Jorge Oscar (3»
|
|
Allori, Pietro (18 May 192»
|
|
Wissing, Norbert (18 May 1»
|
|
|
|
|
|
|