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That old bug returned. Sometimes creation of new threat not going to work. The replies still work. I will fix it soon.
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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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...
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[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...
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[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...
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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...
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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...
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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...
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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...
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http://audioratbag.blogspot.com/2015/01/cat-vomit-special-6e5p-6c33c-parafeed.html
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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...
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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...
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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 ...
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[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...
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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...
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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...
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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 ...
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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...
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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
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[quote user="Romy the Cat"]
[/quote] Funny it took 2.5 hours to build the San Audio Kit for 6E5P. The 6E5P is at 150V (a bit low for it but it is OK), loaded with 15K and coupled with 2A3 via a cap. The 6E5P is biased with one 3.6V lithium ba...
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I have no idea why this guy is and what he says, I even have no idea of what language it is but here it is: the 6E5P-6C33C amp in PP configuration.
http://drzlab.com/projekti/TPPP_6c33c.html
Interesting that he uses Russian milita...
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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...
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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...
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[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...
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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...
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[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...
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In my post above I have mention that Srajan is in a way a brainless parrot that repeats the heard and has no ability of desire to understand what was the noise about. His comments that 6E5P and E810F are “close electrical” is a good indication how it...
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Romy,
I assume you plan to use one of these as the driver tube. Do you distinguish any difference in the sound between the two tubes? I am curious as I have been looking over a big pile of them and they respond quite differently regarding vibrat...
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BTW, how stable 6E5P is? I'm asking as I was contemplating biasing the output by the voltage drop on 6E5P's plate choke (DCR is say around 1k),with only some minimal autobias on the output. The drawback is that any drift in the driverwill rebias the ...
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[quote user="N-set"]BTW, how stable 6E5P is? I'm asking as I was contemplating biasing the output by the voltage drop on 6E5P's plate choke (DCR is say around 1k),with only some minimal autobias on the output. The drawback is that any drift in th...
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[quote user="Antonio J."] 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 adjustment...
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I think it should be somewhere posted for my and perhaps for others future references. Here is the setting for testing Melquiades' single-stage tubes on Hickok 580/580A tube testers. To test the tube as a driver for a full Milq (two stages) set ...
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