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Read the Post in new Window Read the Post in Threaded view  Post #32: The Déjà vu feelings about 6E5P-E vs 6E5P by Romy the Cat on 2008-02-22 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
I did have the Déjà vu feelings about it as I felt that we had this conversation in past. Here we go – it was a year ago. http://www.goodsoundclub.com/GetPost.aspx?PostID=4291That post has both 6E5P-E and 6E5P datasheets and they are virtually the d...

Read the Post in new Window Read the Post in Threaded view  Post #27: The 6E5P-E vs 6E5P. by Romy the Cat on 2007-04-29 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  73 Replies 
[quote user="hagtech"] Stepping back a moment, I'm guessing this tube is designed for radar operation.  Maybe in an aircraft.  The spec sheet definately talks only about pulse mode of operation.  Maybe it was a driver for a pulse radar...

Read the Post in new Window Read the Post in Threaded view  Post #89: Swimming the ocean at night? by Romy the Cat on 2008-12-28 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
[quote user="drdna"] I think this 2A3 must have a specific set-up to sound its best. You have not found it yet. To begin with and familiarize yourself with the sound of it, I suggest sticking with the topology that has been tested by amplifier design...

Read the Post in new Window Read the Post in Threaded view  Post #20: The 6e5p as driver for GM-70. by Romy the Cat on 2012-03-12 
Browse the content of the threads in new Window  Thread: More 6E5P-6C33C amps. in Melquiades Amplifier  22 Replies 
Yes, decoud, the 6e5p-GM70 is an easy amp but 6e5p is a hell of voltage driver and I do not feel that a single 6e5p will be able to drive GM70 into grid currents.  If people use dead speakers and need a lot of power than use the ability of direct hea...

Read the Post in new Window Read the Post in Threaded view  Post #240: DC coupling and killing 13db and driving 6e5p miller and.... by cv on 2009-04-22 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
Sorry I'm a little late here, but anyway... here's something that may worth trying. Apologies that I can't provide a schematic at the mo - I can sort this out later if you like. In the meantime, you'll need a pen and napkin to help visualise this:The...

Read the Post in new Window Read the Post in Threaded view  Post #240: DC coupling and killing 13db and driving 6e5p miller and.... by cv on 2009-04-22 
Browse the content of the threads in new Window  Thread: Single-stage Melquiades vs. DHT amps in Melquiades Amplifier  397 Replies 
Sorry I'm a little late here, but anyway... here's something that may worth trying. Apologies that I can't provide a schematic at the mo - I can sort this out later if you like. In the meantime, you'll need a pen and napkin to help visualise this:The...

Read the Post in new Window Read the Post in Threaded view  Post #21: Vietnamese 6e5p-6c33c by decoud on 2012-11-23 
Browse the content of the threads in new Window  Thread: More 6E5P-6C33C amps. in Melquiades Amplifier  22 Replies 
http://www.sitefile.org/showimage/6/6c33c.htm ...

Read the Post in new Window Read the Post in Threaded view  Post #38: 6e5p can drive in full amp? by Celsius on 2013-12-12 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
[quote user="Romy the Cat"]Celsius, I think you do not take in your equation the input voltage. If you bias 6E5P with 4.1V then it can pass 4V with no feedback.  Since the tube has under normal circumstances 33 times gain then you have 132V RMS from ...

Read the Post in new Window Read the Post in Threaded view  Post #72: Single stage 6e5p and no bass problem by shannon on 2016-03-30 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  73 Replies 
people think you can use 6e5p single stage full range. like for example http://diyparadise.com/w/purist-wet-dream-gets-wetter/ stiff sound aside what about the b...

Read the Post in new Window Read the Post in Threaded view  Post #6: 6e5p and OP Method by Chirag on 2005-12-03 
Browse the content of the threads in new Window  Thread: Headphone amplifiers. Baby Melquiades? in Melquiades Amplifier  27 Replies 
Hi Cat,It seems the 6e5p is driving the transformer directly. I've used various versions of even simple mosfet followers to good effect at the headphone level, but never considered using a speaker level transformer.  Did you and Dmitry cons...

Read the Post in new Window Read the Post in Threaded view  Post #23: Single-stage 6E5P: more notes in dairy. by Romy the Cat on 2007-04-27 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  73 Replies 
Dima and I spent today quite a time experimenting with different operation of the Single-stage Milq. We drove it from my Fluke 409D with resistor bias, loaded with 12.8:1 into 12R. Playing with bias, voltage and current we tried to find an operation ...

Read the Post in new Window Read the Post in Threaded view  Post #10: How the 6E5P picks microphonics. by Romy the Cat on 2007-03-30 
Browse the content of the threads in new Window  Thread: A resistor between screen and grid in Melquiades Amplifier  9 Replies 
I still would hesitant to short the scene and anode and it would require a very sever control of the tubes. The problem is that it would be necessary to do not only then they new (it not too difficult to put then before a fast scope and to see if the...

Read the Post in new Window Read the Post in Threaded view  Post #11: 2a3 and 6e5p by drdna on 2007-12-05 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
[quote user="Paul S"]Adrian, I agree that SETs generally have issues such as you describe, and moreso the small ones, especially at the frequency extremes, and at saturation, which tends to occur all too soon, IMO.  But I have not sourced t...

Read the Post in new Window Read the Post in Threaded view  Post #20: The 6e5p as driver for GM-70. by Romy the Cat on 2012-03-12 
Browse the content of the threads in new Window  Thread: More 6E5P-6C33C amps. in Melquiades Amplifier  22 Replies 
Yes, decoud, the 6e5p-GM70 is an easy amp but 6e5p is a hell of voltage driver and I do not feel that a single 6e5p will be able to drive GM70 into grid currents.  If people use dead speakers and need a lot of power than use the ability of direct hea...

Read the Post in new Window Read the Post in Threaded view  Post #34: A commercial amp with 6E5P by Romy the Cat on 2008-12-31 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
Frank Blöhbaum, from Sweden I believe, have designed for Thorens a preamp that I think the first outside of Russia commercial use my 6E5P tube. http://www.6moons.com/audioreviews/thorens4/tep3800.html I do not know if Frank reads this site but if ...

Read the Post in new Window Read the Post in Threaded view  Post #25: 6E5P vs. 6E6P by Romy the Cat on 2007-01-13 
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, with me apparent alzheimer-inspired progressing dyslexia…. I’m keep confusing whatever is possible to confuse. What I meant to say was the 6E5P vs. 6E6P. The last one you have in DR version. They are essentially the same tubes with different p...

Read the Post in new Window Read the Post in Threaded view  Post #1: The 6E5P tube data. by Romy the Cat on 2007-07-23 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
Taras Oleynk aka “ML8” sent me a couple months ago his measurements of different driver line-level tubes including the Melquiades’s diver tubes – the 5E5P. I am posting his data here with his permission, including Taras’ statement that is JUST PRELIM...

Read the Post in new Window Read the Post in Threaded view  Post #13: The 6E5P – Swedish cooking by Romy the Cat on 2008-01-02 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
Here is a document in Swedish language that describes its authors’ view on 6E5P. Since the author extensively use a park of Russian tubes I presume that he is Russian descent. http://www.romythecat.com/pdf/6E5P_Swedish.pdf If you do not speak Swedi...

Read the Post in new Window Read the Post in Threaded view  Post #15: More 6E5P pics by hagtech on 2008-02-20 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
Oh, I forgot, the input sensitivity is roughly 0.95Vrms.  At 6W power, the output sinewave looks like this:[img]http://www.hagtech.com/blog/images/pa-10power.jpg[/img]When driven into overload, a +6dB input (1.9Vrms) generates 13W output and it ...

Read the Post in new Window Read the Post in Threaded view  Post #18: 6E5P Bias by hagtech on 2008-02-20 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
I run the driver tube at 170V @20mA.  I don't think you need to run this tube at high current.  It is very linear with wide signal swings at this bias.  I can get roughly 70Vrms out of it.  Output stage clips first, driver continu...

Read the Post in new Window Read the Post in Threaded view  Post #31: The sizes of the 6E5P family.... by Romy the Cat on 2008-02-22 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
I do not remember what I sent to you, since I sent you for measurement perpose then it might be the impulse version of the tube. In the image below are vertical tubes from left to right: 0A26E5P-E (smaller)6E6P-DR (larger)6E5P (the largest)0A2 ...

Read the Post in new Window Read the Post in Threaded view  Post #22: 6e5p-6c33c and...Cat by Romy the Cat on 2015-08-17 
Browse the content of the threads in new Window  Thread: More 6E5P-6C33C amps. in Melquiades Amplifier  22 Replies 
http://audioratbag.blogspot.com/2015/01/cat-vomit-special-6e5p-6c33c-parafeed.html ...

Read the Post in new Window Read the Post in Threaded view  Post #26: 6e5p SRPP bias by lampes on 2016-11-04 
Browse the content of the threads in new Window  Thread: Melq 6e5p driver stage for ss? in Melquiades Amplifier  29 Replies 
Hi to everyoneyears of reading but never subscribe and post to forumI see that Zarathustra circuit and i m very interested on the first SRPP stageCan someone point out how to implement Melq Gas Bias on that SRPP circuit?I would like to implement a li...

Read the Post in new Window Read the Post in Threaded view  Post #28: Gas Bias SRPP 6e5p by lampes on 2016-11-17 
Browse the content of the threads in new Window  Thread: Melq 6e5p driver stage for ss? in Melquiades Amplifier  29 Replies 
Hi ShannonI think that Romy have it already on his pre-assembled Zarathustra on this topic's pictures: http://www.goodsoundclub.com/Forums/ShowPost.aspx?PageIndex=1&postID=4121#4121and also here:on post #8http://www.goodsoundclub.com/Forums/ShowP...

Read the Post in new Window Read the Post in Threaded view  Post #12: VR1 and 6E5P by Antonio J. on 2005-11-05 
Browse the content of the threads in new Window  Thread: Milq: Starting the project in Melquiades Amplifier  23 Replies 
Hi Romy,The builder regards VR1 more like an "offset to 0" adjuster than a bias control for the 6E5P since its working range is quite narrow. He asked me to know from you if along the 6E5P's lifespan it needs further adjustments at VR1 or if a single...

Read the Post in new Window Read the Post in Threaded view  Post #5: 6E5P, the resistors... and the load. by Romy the Cat on 2007-03-24 
Browse the content of the threads in new Window  Thread: A resistor between screen and grid in Melquiades Amplifier  9 Replies 
[quote user="ml8"]...but resistor between screen grid and plate, to my hearing, makes sound slightly unnatural, especially in highs.But this may be not true in your case (i didn't try to use this resistor with 6E5P, only with other power tetrodes), s...

Read the Post in new Window Read the Post in Threaded view  Post #24: Listening the Single-stage 6E5P by Romy the Cat on 2007-04-28 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  73 Replies 
Now I re-listen all the things the we try to measure. To surmised everything I have to tell that Dima’s way to looks for optimum operation point of the tube (setting balance for voltage vs. current sufficiency) turned out to be very successful as I d...

Read the Post in new Window Read the Post in Threaded view  Post #12: The 6E5P-2A3 Milq? by Romy the Cat on 2007-12-05 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
[quote user="drdna"]  Well, and I have a dozen of them sitting here next to my desk while I am building my Milq amp s-l-o-w-l-y so I guess I will discover my audio intelligence level sometime after the New Year.[/quote] That is so cool that you...

Read the Post in new Window Read the Post in Threaded view  Post #68: The con and pro of 6E5P anti-oscillations measures by Romy the Cat on 2007-12-24 
Browse the content of the threads in new Window  Thread: 6 Channel Version of Super Melquiades in Melquiades Amplifier  131 Replies 
[quote user="Wojtek"]has supposedly very nice Obbligato line of film HV caps . [/quote] Thanks, the high nominals the have only 630V and they are larger than I would like to have. Does anyone know how those Obbligato sound in PS? [quote user="hagte...

Read the Post in new Window Read the Post in Threaded view  Post #14: 6E5P is good driver by hagtech on 2008-02-20 
Browse the content of the threads in new Window  Thread: The 6E5P tube data. in Melquiades Amplifier  44 Replies 
I got my second version of new power amp up and running, this time using the 6E5P Romy recommended.  Output tubes are 2A3.  Amazingly, this amp runs at 0.12% distortion at 1W.  No feedback anywhere.  It is simple two stage amp run...
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