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Read the Post in new Window Read the Post in Threaded view  Post #129: NOS 2A3 tubes versus new tubes by drdna on 2009-01-26 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
I totally am a believer that the construction of a tube determines how it will sound. This makes perfect sense when you consider the tube is relies on the changing flux of electrons in a vacuum. It is easier at least for me to visualize this as a ph...

Read the Post in new Window Read the Post in Threaded view  Post #5: Not all high power tubes are based on transmitting tubes by morricab on 2007-11-16 
Browse the content of the threads in new Window  Thread: NAT Audio Magna -160 Watts of Single-Ended Class A in Audio Discussions  5 Replies 
Hi Romy, KR audio is making high power SET and parallel SET amps using tubes designed by them specifically for low frequency amplification (read as in not radio frequencies).  They are getting the power with lower voltages and higher currents th...

Read the Post in new Window Read the Post in Threaded view  Post #3: Tubes Sound vs. Sound of Tubes by Romy the Cat on 2011-05-09 
Browse the content of the threads in new Window  Thread: Getting more power from SET vs. properly distorting SS. in Audio Discussions  4 Replies 
[quote user="Paul S"]While you are merely being empirical, there are actually plenty of devices that aim to "benefit" the end sound of SS gain by using tubes to "condition" the signal from DACs, etc.  Also, there are plenty of commercial widgets ...

Read the Post in new Window Read the Post in Threaded view  Post #35: The "art" of buying high transconductance tubes. by Romy the Cat on 2008-01-19 
Browse the content of the threads in new Window  Thread: 7788 tube mic pre design in Analog Playback  38 Replies 
[quote user="hagtech"]Romy, you were right.  I just got in another pair of 7788 from eBay.  This time, one tube has a little bit of microphony, not bad, really.  The other was dead quiet!  No ping at all.  Very impressive, th...

Read the Post in new Window Read the Post in Threaded view  Post #148: It's the Tubes (again), Stupid by Paul S on 2010-01-09 
Browse the content of the threads in new Window  Thread: Initial thoughts about new/old Lamm ML2s in Audio Discussions  217 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #29: The trouble with tubes... by Paul S on 2008-01-13 
Browse the content of the threads in new Window  Thread: 7788 tube mic pre design in Analog Playback  38 Replies 
Why do we even bother with tubes for low levels?  Of tubes generally, I have used 6SN7s, 2A3s and EL34s with no known-to-me problems, but lots of various noise trouble with certain tubes, including 6DJ8 family, KT88s, and on and o...

Read the Post in new Window Read the Post in Threaded view  Post #157: The Sylvania 2A3 NOS report by drdna on 2009-02-12 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
Okay so I got the NOS Sylvania "Spring Top" dual filament 2A3 tubes and have been listening to them for a while, now I am ready to make a report on the tube. The tube is well built and structurally sound. Tapping gives a very small "tabla" sound ...

Read the Post in new Window Read the Post in Threaded view  Post #59: 6C33C amp/preamp follow up by KOTriode on 2012-03-14 
Browse the content of the threads in new Window  Thread: A different breed of 6C33C amplifier. in Melquiades Amplifier  84 Replies 
Wow! I did not realized that almost 4 months have passed since I wrote last. Quite a few things have happened the last 4 months that I have played with the 6C33Camp/preamp combo. I have tried at least 3 different vendors on the Ulyanovsk type, the ...

Read the Post in new Window Read the Post in Threaded view  Post #1: About the life-expectancy of the new production tubes. by Romy the Cat on 2008-12-29 
Browse the content of the threads in new Window  Thread: About the life-expectancy of the new production tubes. in Audio Discussions  9 Replies 
[quote user="drdna"] I built this amplifier more than ten years ago, before these other tube companies were in business. I know the Vaic tubes, which the EL tubes are related to. However, I have not tried either tube. Maybe it is a good idea (and I c...

Read the Post in new Window Read the Post in Threaded view  Post #18: The more you know about tube testing, by Paul S on 2007-01-11 
Browse the content of the threads in new Window  Thread: Get, or made up a tube tester, it’s necessary in Audio For Dummies ™  44 Replies 
the less you know about...So, how do we go about screening tubes for audio, particularly audio signal tubes?  The only person I can think of who claims to have found a specific testing paramerer for this is Roger Modjeski, of Music Reference and...

Read the Post in new Window Read the Post in Threaded view  Post #1: Paradoxes of my Racism. by Romy the Cat on 2011-04-13 
Browse the content of the threads in new Window  Thread: Paradoxes of my Racism. in Site Support Forum  10 Replies 
I just discovered it, somebody pointed it out in another thread, and it is so funny. I am commonly known for hating Russian tubes. I mean there were very few tubes that were designed in Russia and most of the Russian tubes t tubes are juts rep...

Read the Post in new Window Read the Post in Threaded view  Post #28: Your Own Tube Lore by Paul S on 2008-12-14 
Browse the content of the threads in new Window  Thread: About EAR 834P Modifications in Analog Playback  45 Replies 
Adrian, I wonder how you wound up with the never-mentioned FET 10?  FWIW, it was one of the better all around phono stages I've heard, and - not that it matters - I prefer it to the EAR 834 I heard.  Is this another case wher...

Read the Post in new Window Read the Post in Threaded view  Post #23: It's the tube by KOTriode on 2011-09-18 
Browse the content of the threads in new Window  Thread: A different breed of 6C33C amplifier. in Melquiades Amplifier  84 Replies 
Romy, I have good confidence that it was the tubes and not the circuit. I have checked the cathode driver that bias the 6C33C and there was not any problem. Sure if the cathode bias failed, the 6C33C current will shoot way up and burned up the fuse...

Read the Post in new Window Read the Post in Threaded view  Post #159: Sylvania 2A3 in a World without Color by drdna on 2009-02-13 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
[quote user="Romy the Cat"][quote user="drdna"]However, there is no comparison to the expensive tubes from Kron, Sophia, and Emission Labs. These are all in a separate category. These produce a very different sound. It is like this: on the old black ...

Read the Post in new Window Read the Post in Threaded view  Post #2: Quality controls, and not only for the finished goods by ghpicard on 2009-01-07 
Browse the content of the threads in new Window  Thread: About the life-expectancy of the new production tubes. in Audio Discussions  9 Replies 
[quote user="Romy the Cat"] For instance the 2A3 has no tungsten cathodes and therefore its cathode might be “poisoned” in time if it was not properly pre-burned and some other methods were not taken care.  Those methods are expensive but they ...

Read the Post in new Window Read the Post in Threaded view  Post #4: The vintage tubes paranoia and a custom bass transformer by Romy the Cat on 2008-01-11 
Browse the content of the threads in new Window  Thread: My (Amplification + Acoustic System): what is next? in Audio Discussions  41 Replies 
[quote user="Paul S"] I have been surprised that you have not already pursued the Zarathustra for your multi-driver, sealed LF.  From your early descriptions of both, this seemed like a natural pairing and the most likely way to go, to keep the ...

Read the Post in new Window Read the Post in Threaded view  Post #15: The damn tubes tuners. by Romy the Cat on 2008-08-22 
Browse the content of the threads in new Window  Thread: A tube tuner? REL Precedent 646C in Off Air Audio  24 Replies 
I have no idea where this saga with REL leads me. Even though I do have substantial sonic improvement over the original REL version I still do not know if I like this tuner all together. The 50 years all tube tuner with 17 tubes is very freaky thing....

Read the Post in new Window Read the Post in Threaded view  Post #6: MAX-282 Anti-skating and arm tubes by Gibraltar on 2010-08-14 
Browse the content of the threads in new Window  Thread: Micro Seiki MAX 282 Questions in Analog Playback  11 Replies 
I recently picked up a MAX-282 tone arm and when setting it up with my test record I'm getting buzzing in the right channel during the bias test tracks. Changing the anti-skating setting has no audible effect. On other arms I have if I set the VTF to...

Read the Post in new Window Read the Post in Threaded view  Post #62: Omnigon Tubes by audiosix on 2013-12-31 
Browse the content of the threads in new Window  Thread: Where are our good phonostages? in Analog Playback  61 Replies 
No more interest in this subject? Reinhard...

Read the Post in new Window Read the Post in Threaded view  Post #293: Low noise tubes by N-set on 2020-03-16 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  311 Replies 
[quote user="N-set"] - considering another red tip 12AX7 for the output but given the change was not big at the input it's more of an itch...a costly one at $275 [/quote]After a second thought actually the output tube is obviously in the feedback...

Read the Post in new Window Read the Post in Threaded view  Post #2: The vacuum tubes computers... by Romy the Cat on 2008-01-09 
Browse the content of the threads in new Window  Thread: Valve Technology Timeline in Audio Discussions  4 Replies 
In the end of the 40’s IBM made the Selective Sequence Electronic Calculator which contained 12,500 vacuum tubes (25L6, 6J6, 6211) that could multiply two 10-digit numbers 40 times a second. The first versions of ENIAC used 19,000 vacuum tubes. The U...

Read the Post in new Window Read the Post in Threaded view  Post #13: Souls of tubes, Tone Control and midrange forwardness. by Romy the Cat on 2007-08-03 
Browse the content of the threads in new Window  Thread: The Sakuma's Show in Audio Discussions  35 Replies 
[quote user="dazzdax"] Sakuma's idiosyncratic and esoteric way of thinking (he believes for example that tubes have a "soul") is not to everyone's liking. He is projecting his mind into a sort of tone control. At least for him this tone control bring...

Read the Post in new Window Read the Post in Threaded view  Post #21: Many fast tubes and the Lynn Olson Syndrome by Romy the Cat on 2008-01-02 
Browse the content of the threads in new Window  Thread: 7788 tube mic pre design in Analog Playback  38 Replies 
[quote user="hagtech"]Yes, it is an E55L.  I wonder how stable it is.  Interesting to me how many of these "uber-tubes" are designed for RF operation.  Should make a wonderful oscillator.  [/quote] Go figure not stable are they. ...

Read the Post in new Window Read the Post in Threaded view  Post #29: The trouble with tubes... by Paul S on 2008-01-13 
Browse the content of the threads in new Window  Thread: 7788 tube mic pre design in Analog Playback  38 Replies 
Why do we even bother with tubes for low levels?  Of tubes generally, I have used 6SN7s, 2A3s and EL34s with no known-to-me problems, but lots of various noise trouble with certain tubes, including 6DJ8 family, KT88s, and on and o...

Read the Post in new Window Read the Post in Threaded view  Post #37: Other Tubes by hagtech on 2008-01-19 
Browse the content of the threads in new Window  Thread: 7788 tube mic pre design in Analog Playback  38 Replies 
That 8233 might do it.  Also noticed the 6CL6 in triode mode will get you almost there, but only a mu of 20.  The 6688 could be a substitute.jh...

Read the Post in new Window Read the Post in Threaded view  Post #13: High impedance tubes by electronluv on 2009-05-27 
Browse the content of the threads in new Window  Thread: Another electromagnet driver: Great Vintage Loudspeakers. in Horn-Loaded Speakers  17 Replies 
are you asking if i like higher impedance tubes with my drivers  i  have always love the sound of imac tubes round plate triodes !!! i change amps alot right now i im running 75tl amp for highs and a 300B for bass drivers . i hope this answers your q...

Read the Post in new Window Read the Post in Threaded view  Post #394: Kids and tubes cont. by N-set on 2012-09-05 
Browse the content of the threads in new Window  Thread: Romy The Cat's new Listening Room in Audio Discussions  478 Replies 
[quote user="JJ Triode"]Putting the Pure Power in the basement might be fine, but I don't think you need to banish the Melqs down there, at least not yet.You don't know yet if there will be kids, and if so it will still be a couple years before one a...

Read the Post in new Window Read the Post in Threaded view  Post #14: Wonder about tubes… by Romy the Cat on 2013-04-16 
Browse the content of the threads in new Window  Thread: Lamm ML2.0 & Lamhorn/AER in Audio Discussions  25 Replies 
zztop7, wondering about the tubes in this case I think would be similar to treating the metastatic cancer with Tylenol. It is wife-accommodating room with cathedral ceiling. Most likely the ceiling is not treated, the wife is happy for sure about tha...

Read the Post in new Window Read the Post in Threaded view  Post #471: Not for tubes? by clarkjohnsen on 2010-03-15 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1916 Replies 
Yes, each piece of gear would seem to require its own unit. But they probably deliver enough juice for a tubed preamp or the like.clark ...

Read the Post in new Window Read the Post in Threaded view  Post #290: The Shuguang 2A3 tubes. by Romy the Cat on 2009-05-11 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
It is not the subject that I closely observe at this point but I have to tell you that paling with my new MF amp I do develop some linking to Chinese Shuguang tubes. They are pretty good and for $75 per pair new they are surprisingly good. I am not f...
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