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Read the Post in new Window Read the Post in Threaded view  Post #36: 6c33 swing voltage by Celsius on 2013-11-06 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
[quote user="Romy the Cat"]Why do you think I bout a 1000 of them and closed to the rest of my life my interest in driver tubes?Still, the 6E5P should not be measured as a driver but heard as a driver – the beauty in this tube is in its sound.I do no...

Read the Post in new Window Read the Post in Threaded view  Post #45: VR2 issue leading to jump in current on 6C33 tube by S.yorke on 2018-10-06 
Browse the content of the threads in new Window  Thread: Building Melquiades: Chronicle of full-range in Melquiades Amplifier  44 Replies 
Dear Romy,it had been a while before I hv return to your goodself and here.The Meliq had been built according to your circuit. However, after a few days' breaking in period. The VR2 have issue and causing sudden increase of current... I think it migh...

Read the Post in new Window Read the Post in Threaded view  Post #11: 6c33 testing by hagtech on 2007-01-08 
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 
[quote user="romy"]send you two 6C33C – a new one and the burned out[/quote]Please do.  I have interest in the result myself and don't mind spending the time.  I can post photos for each tube.[quote]a trace for the very given tube is “nice ...

Read the Post in new Window Read the Post in Threaded view  Post #13: pike with a double twist (6c33 dive) by hagtech on 2007-01-08 
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 
Sadly I have never spent the time to try and correlate the sonics of a tube with the trace characteristics.  Ok, sometimes it is obvious.  A flat line is a dead tube.  Normally I measure and compare both sections of dual triodes. ...

Read the Post in new Window Read the Post in Threaded view  Post #174: 6C33/2A3 DSET? by Romy the Cat on 2009-02-14 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
[quote user="drdna"] How about using the 6C33C for the low midrange-woofer, the 2A3 for the upper midrange, and the 45 for the tweeter? I suspect if each circuit can be optimized, that they can do their best within each frequency range. [/quote] Hm…....

Read the Post in new Window Read the Post in Threaded view  Post #38: 6C33 at higher volatges & lower curents? by N-set on 2010-11-02 
Browse the content of the threads in new Window  Thread: To drive the 6C33C... in Melquiades Amplifier  65 Replies 
Risking that the topic has already been discussed and that I postin a wrong category (Romy feel free to (re)move this post:Is there any sense in trying 6C33 at higher volatges and lower currents?More precisely, I've been wondering if  1/2 6C33 @ 300-...

Read the Post in new Window Read the Post in Threaded view  Post #10: To free up the 6C33.... by Romy the Cat on 2005-08-20 
Browse the content of the threads in new Window  Thread: Bass drivers inquiry in Audio Discussions  10 Replies 
[quote user="cv"]Not to start a pissing contest, but how are they wired (series/parallel?), and with what voltage across them? Something just can't be right; the makers spec is 88db / 2.83V, which is over 1W. Unless it's uniquely smooth room gain wit...

Read the Post in new Window Read the Post in Threaded view  Post #14: Yes, the 6C33 is a capacitive bitch. by Romy the Cat on 2007-09-01 
Browse the content of the threads in new Window  Thread: 6 Channel Version of Super Melquiades in Melquiades Amplifier  131 Replies 
[quote user="cv"]...yes, I remember. I wonder if it's due to the large (and varying with signal) capacitance of the 6C33 input interacting with the small coupling cap. Hopefully this will be less of an issue with the 6e5p/6p.[/quote]Chris, It is cer...

Read the Post in new Window Read the Post in Threaded view  Post #69: 6c33 outlier by cv on 2009-02-11 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  74 Replies 
Yes, well - I wasn't really saying much; just a vague hypothesis. There is some tendency for lower Rp tubes, (and somewhat related) tubes with a certain harmonic structure, to sound more romantic, and hence impart that quality to music regardless of ...

Read the Post in new Window Read the Post in Threaded view  Post #2: The Yamamoto 6C33 sockets. by Romy the Cat on 2009-03-22 
Browse the content of the threads in new Window  Thread: The RCA’s 6C33C sockets? in Melquiades Amplifier  9 Replies 
A site’s visitor sent me a link about the $100 per socket: http://www.jacmusic.com/sockets/html/Yamomoto.html Despite of the semi-idiocy that is written in the promo material in the link the socket looks like the good one. I would personally would ...

Read the Post in new Window Read the Post in Threaded view  Post #36: 6c33 internet bandwidth by hagtech on 2007-01-24 
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 
Sorry for making that video so large.  Here it is again but 1/10th the number of bits.  Compression can be a useful thing.http://www.hagtech.com/blog/media/6c33.wmvjh...

Read the Post in new Window Read the Post in Threaded view  Post #7: How to test 6C33? by carlosb on 2020-04-10 
Browse the content of the threads in new Window  Thread: How to test 6C33C? in Melquiades Amplifier  7 Replies 
Romy, I have a TV2 too, please can you tell me wich is the configuration/settings to test the 6C33?. Almost I want to test filaments if it´s too much amp for the tester. Thanks ...

Read the Post in new Window Read the Post in Threaded view  Post #11: Re: To free up the 6C33.... by cv on 2005-08-21 
Browse the content of the threads in new Window  Thread: Bass drivers inquiry in Audio Discussions  10 Replies 
Romy - Not sure if you mean increase the load above 550ohms, which would give you less power, better damping and possibly less distortion (trade off between how much you need to push the tube and the flatter loadline, also I suspect there is dis...

Read the Post in new Window Read the Post in Threaded view  Post #1: To drive the 6C33C... by Romy the Cat on 2005-07-10 
Browse the content of the threads in new Window  Thread: To drive the 6C33C... in Melquiades Amplifier  65 Replies 
Sine I informed public about Melquiades amplifiers I receive many emails from people asking me about the operation points of 6C33C. For whatever reasons people mistakably took me for some kind of 6C33C guru, which is am not. Moreover I could be hardl...

Read the Post in new Window Read the Post in Threaded view  Post #69: Hello and Fullrange Melquiades schematics question by Welborne on 2013-05-24 
Browse the content of the threads in new Window  Thread: Bias help in Melquiades Amplifier  96 Replies 
(sorry, this is supposed to be posted in the questions and answers colume but I must be so stupid to have it posted here and now I don't know how to move it there.)Hi Romy,How are you!  This is Welborne, from far across the ocean, Hong Kong. I have k...

Read the Post in new Window Read the Post in Threaded view  Post #7: Super Melquiades vs Melquiades treble channel by cv on 2005-07-17 
Browse the content of the threads in new Window  Thread: Super Melquiades Amplifier. in Melquiades Amplifier  29 Replies 
Romy, Now you mention the issues here, I am thinking about what the differences in quality might be due to. I notice that you haven't explicitly said which is better, super or regular... so think of this just as brainstorming as to why things are... ...

Read the Post in new Window Read the Post in Threaded view  Post #18: A TV single in SET amplifier. by Romy the Cat on 2010-11-15 
Browse the content of the threads in new Window  Thread: More 6E5P-6C33C amps. in Melquiades Amplifier  22 Replies 
Panos, it is not about convincing me. My standing is absolutely irrelevant in this subject – I do not sell audio and do not making living by evaluation of SET amplifiers.  I report what I have witnessed, nothing more. Sure, it is very possible that y...

Read the Post in new Window Read the Post in Threaded view  Post #15: Re: OK, ok, I did it! by cv on 2005-07-20 
Browse the content of the threads in new Window  Thread: Super Melquiades Amplifier. in Melquiades Amplifier  29 Replies 
Interesting Romy, particularly the "echo" affect and weird overtones with the aircap. I wonder if the thing is picking up resonances and if the impedance issue is responsible for the overtones... signal being modulated by the varying input capacitanc...

Read the Post in new Window Read the Post in Threaded view  Post #70: I have another definition of neutrality then many others. by Romy the Cat on 2009-02-11 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  74 Replies 
[quote user="cv"]Yes, well - I wasn't really saying much; just a vague hypothesis. There is some tendency for lower Rp tubes, (and somewhat related) tubes with a certain harmonic structure, to sound more romantic, and hence impart that quality to mus...

Read the Post in new Window Read the Post in Threaded view  Post #1: Wich melquiade? by azrael the cat on 2013-04-11 
Browse the content of the threads in new Window  Thread: Wich melquiade? in Melquiades Amplifier  1 Replies 
Hi!English's not my mother language so I'd have advices to choose wich Melquiade could be the best for me...I read that there's a lot of different versions...and I wasn't able to email Romy because of the robot barrier.I've very good 95db Fullrange B...

Read the Post in new Window Read the Post in Threaded view  Post #38: 6C33 at higher volatges & lower curents? by N-set on 2010-11-02 
Browse the content of the threads in new Window  Thread: To drive the 6C33C... in Melquiades Amplifier  65 Replies 
Risking that the topic has already been discussed and that I postin a wrong category (Romy feel free to (re)move this post:Is there any sense in trying 6C33 at higher volatges and lower currents?More precisely, I've been wondering if  1/2 6C33 @ 300-...

Read the Post in new Window Read the Post in Threaded view  Post #36: 6c33 internet bandwidth by hagtech on 2007-01-24 
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 
Sorry for making that video so large.  Here it is again but 1/10th the number of bits.  Compression can be a useful thing.http://www.hagtech.com/blog/media/6c33.wmvjh...

Read the Post in new Window Read the Post in Threaded view  Post #3: Re: An ultimate transformer within a narrow bandwidth? by cv on 2005-02-07 
Browse the content of the threads in new Window  Thread: An ultimate transformer for narrow bandwidth? in Melquiades Amplifier  14 Replies 
Alas, not much time to deliver the promised treatise...So, tantalisingly, I will suggest this; for the range 1k up, you would have no problem getting a small mumetal OPT made suitable for the 6C33/S2 combination. Actually, I have something simil...

Read the Post in new Window Read the Post in Threaded view  Post #5: aircore transformer design by cv on 2005-02-13 
Browse the content of the threads in new Window  Thread: An ultimate transformer for narrow bandwidth? in Melquiades Amplifier  14 Replies 
chaps,I found the design details; it was posted by on the Joenet a few years ago.Basically, it involved making a vertically sectioned bobbin; start with a 70mm diameter cylinder of whatever material (I used white nylon cos it was available and cheap;...

Read the Post in new Window Read the Post in Threaded view  Post #174: 6C33/2A3 DSET? by Romy the Cat on 2009-02-14 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
[quote user="drdna"] How about using the 6C33C for the low midrange-woofer, the 2A3 for the upper midrange, and the 45 for the tweeter? I suspect if each circuit can be optimized, that they can do their best within each frequency range. [/quote] Hm…....

Read the Post in new Window Read the Post in Threaded view  Post #2: There is no different Melquides versions. by Romy the Cat on 2013-04-11 
Browse the content of the threads in new Window  Thread: Wich melquiade? in Melquiades Amplifier  1 Replies 
David, there are no different Melquides versions.  Melquides is all about to use two-stage solution around cathode-ground 5E6P/6E6P with grid resistor bias where the bias voltage buffered by gas tubes. You can creates countless versions around th...

Read the Post in new Window Read the Post in Threaded view  Post #42: just keep spending more money on equipment by hagtech on 2007-01-27 
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 
[quote]do two tubes at once then it make sense to have one selected reference tube[/quote]I see.  Yes, the digital scope option would work.  I have one, might try it out.  With a 6c33, the VacuTrace has only enough power to trace ...

Read the Post in new Window Read the Post in Threaded view  Post #4: Re: I demonstrated patience too long! by cv on 2005-02-14 
Browse the content of the threads in new Window  Thread: The “Melquíades” début. in Melquiades Amplifier  10 Replies 
Ok, so should be burned in nicely. There are some theories around how mylar and similar interwinding materials (as used by Lundahl, if that is the OPT you are using) can need a fair bit of run in. This is more of an issue on eg input transformer...

Read the Post in new Window Read the Post in Threaded view  Post #69: 6c33 outlier by cv on 2009-02-11 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  74 Replies 
Yes, well - I wasn't really saying much; just a vague hypothesis. There is some tendency for lower Rp tubes, (and somewhat related) tubes with a certain harmonic structure, to sound more romantic, and hence impart that quality to music regardless of ...

Read the Post in new Window Read the Post in Threaded view  Post #12: To regulate or not regulate 6C33C by Romy the Cat on 2010-10-26 
Browse the content of the threads in new Window  Thread: More 6E5P-6C33C amps. in Melquiades Amplifier  22 Replies 
[quote user="Cosmos"] Anyway, as the description on our site on second paragraph says, the third 6C33 located at the back, is used as the pass element of the regulator (controlled by solid state circuitry) providing 220V with 100uV of random noise &a...
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