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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 #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 #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 #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 #3: The KR Enterprises tubes, the vintage ones... by Romy the Cat on 2009-02-10 
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"]KR Enterprises 2A3. Minimal mechanical resonance. Solidly built. Very good, even reproduction of music across the frequency range. There is minimal harmonic distortion. The HF, midrange, and LF are correct. The reproduction of the...

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 #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 #4: New vs old KR tubes by drdna on 2009-02-10 
Browse the content of the threads in new Window  Thread: About the life-expectancy of the new production tubes. in Audio Discussions  9 Replies 
I am NOT going to buy a new set of KR 2A3's just to compare to my "vintage" ones, especially considering the price has gone up to $800 a pair! However, a NOS pair of Sylvania "spring top" 2A3 tubes is on the way to me. So I will have some things ...

Read the Post in new Window Read the Post in Threaded view  Post #9: For the Price of Admission by Paul S on 2009-02-12 
Browse the content of the threads in new Window  Thread: About the life-expectancy of the new production tubes. in Audio Discussions  9 Replies 
My experience has been that tubes that run quiet and quiet down quickly and "properly" when tapped are almost always quiet with respect to self-noise and/or microphonics in use, apart from low level phono use.  And most of my tubes tha...

Read the Post in new Window Read the Post in Threaded view  Post #10: Stressing the damn contemporary tubes. by Romy the Cat on 2009-05-16 
Browse the content of the threads in new Window  Thread: About the life-expectancy of the new production tubes. in Audio Discussions  9 Replies 
This weekend I will be finishing the whole Milq modefication, putting it back to the full-time service and this Sunday the James Levine’s live-to-tape broadcast of “Simon Boccanegra” is was planning to listen via the reincarnated Macondo. Doin...

Read the Post in new Window Read the Post in Threaded view  Post #145: "Pinless" Tubes? by Paul S on 2009-12-26 
Browse the content of the threads in new Window  Thread: Initial thoughts about new/old Lamm ML2s in Audio Discussions  217 Replies 
Anyone ever tried the "pinless" tubes that have long-ish wires in place of the usual pins?A Moscovite I ran across has Russian mil-spec 6AK5 "equivalents" that have pinched glass and the wires instead of pins.  Oddly, Lamm lists the type numerically ...

Read the Post in new Window Read the Post in Threaded view  Post #147: "Aimless" Tubes by Paul S on 2009-12-27 
Browse the content of the threads in new Window  Thread: Initial thoughts about new/old Lamm ML2s in Audio Discussions  217 Replies 
Just a lazy-ass type question, really, motivated by nothing more than curiosity.Today, since it's "time to change the V2", and also out of curiosity, I will break in some "vintage" 6C33Cs.To tell the truth, any logistical "issues" with ML2s actually ...

Read the Post in new Window Read the Post in Threaded view  Post #3: Transformered, tubes sockets… by Romy the Cat on 2006-12-21 
Browse the content of the threads in new Window  Thread: Shock-absorbing tube sockets. in Audio Discussions  9 Replies 
Thanks, I have seen those sockets they might be fine but they do not decupling from chasses and they are not soft. I was thinking about something that has spring effect. Pearls sockets for instance has a soft rubber decupling between base and the pin...

Read the Post in new Window Read the Post in Threaded view  Post #33: No, not about the tubes by Paul S on 2007-01-05 
Browse the content of the threads in new Window  Thread: Initial thoughts about new/old Lamm ML2s in Audio Discussions  217 Replies 
Actually, Romy, it is simply that the tubes that came with the amp were not "good" in the sense that they were not doing their jobs.  Period.  You may remember the pulses through the speakers and how new input tubes cured the problem? ...

Read the Post in new Window Read the Post in Threaded view  Post #41: The tubes pins: the Lamm's dirty secrets are out. by Romy the Cat on 2007-01-13 
Browse the content of the threads in new Window  Thread: Initial thoughts about new/old Lamm ML2s in Audio Discussions  217 Replies 
Actually I was wondering what the hell you were talking about what you were bitching that the ML2 socket can not handle 6N6P first. Ether you changed over 10.000 tubes in there or something else was wrong because the ML2 sockets are fine (except the ...

Read the Post in new Window Read the Post in Threaded view  Post #379: Tubes and kids by JJ Triode on 2012-08-21 
Browse the content of the threads in new Window  Thread: Romy The Cat's new Listening Room in Audio Discussions  478 Replies 
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 arrives and becomes mobil...

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 #190: The discipline with tubes. by Romy the Cat on 2011-01-02 
Browse the content of the threads in new Window  Thread: Initial thoughts about new/old Lamm ML2s in Audio Discussions  217 Replies 
Lamm uses Russian ceramic sockets, at least use to use them 10 yeas back. What he uses not I have no idea. The material of sockets is not as important – the profile of contact is the key. Unfortunately Russian sockets use triangular contact that make...

Read the Post in new Window Read the Post in Threaded view  Post #17: If Tubes are not a Bother... by Paul S on 2021-10-02 
Browse the content of the threads in new Window  Thread: Dannoy 2021 Loudspeakers in Audio For Dummies ™  24 Replies 
Did you just answer your own question? Use the B2, then. Plenty of nice, small tube amps for tweeters, if that's what you want. I could list tube and SS amps, but I hate doing that "in public", not to mention, as you just pointed out, you only need t...
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