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Old 28th March 2007, 06:57 AM   #11
Pano is offline Pano  United States
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I think we are talking about 2 different tubes here. The topic is about the RUSSIAN 6H6 which would be written 6N6P in latin.

This a a very big novel double triode, as mentioned above. A real beast. I have a pair, they dwarf the 12AX7 12AU7 style double triodes. A little bigger than the 12B4A, for scale.
Total dissipation = 8W. Low output impedance, can run well on low voltages. Low mu tube ~ 2.

See the spec sheet below. Because of the double triode, maybe it's better suited to a P-P type amp?

6N6P SPECS PDF

Also check out the site this comes from. Good fun!
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Old 28th March 2007, 07:24 AM   #12
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Had great fun checking the site - liked the lust murder of all fantastic ideas people have..

Found two schematics in my folders - 6N6P PP-amps:
AMP86

AMP85

By the way, In my book Lampoviy Hi-Fi Usilitel Svoimi Rukami (*), I read that 6N6P is closely realted to Russian 6N30P or western type 5687.





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Old 28th March 2007, 05:35 PM   #13
Ryssen is offline Ryssen  Sweden
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Quote:
I read that 6N6P is closely realted to Russian 6N30P
They does not have the same data.
If they are related I dont know.
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Old 28th March 2007, 06:12 PM   #14
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Hej Ryssen! (Ciao Ryssen)

Maybe "related" means that they can be used in slightly similar applications. The both have low Ri and high Pa and hight Ia.
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Old 29th March 2007, 04:23 AM   #15
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@ Magnus

Thanks for those cool schematics. Might try something like it.

OK, my Russian isn't as good as it used to be (never was great) so I can't make out what it says about the output "transformator" in the side text. Can you read it?
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Old 29th March 2007, 06:49 AM   #16
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I fiddled a little with this while waiting for American Idol (I love hearing Simon kill all talentless blowed-up selfcentered non-singers).

AMP86: the transformers is made up of 2x2300 turns (d=0,12mm) and secondary 74 turns (0,74mm).
When I do some calculations (Z1/Z2 = (n1/n2)^2) I get a Z1 of approx 3,6kohm.

For the AMP87 (not 85) I get a Z1 of approx 4,7kohm using 2 x 1800 turns primary and 95 turns secondary.

That is roughly what is mentioned in the text (how many turns the transformers are made up with). There's even an instruction for winding the power transformer.

I have one question now. If my calculations are correct ( ), what have I calculated, the Z of one half of the primary or what
Or should I have calculated all the turns, not 1800 but 2 by 1800=3600 .

Else you understand that B means V like in Volt.
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Old 29th March 2007, 07:57 PM   #17
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Hey thanks! So I did understand it after all - was just doubting myself. Didin't think they would be giving instructions on winding the transfos. That's the DIY spirit!

As for the 6N30P, Mr. Lampizator says it's a computer tube and does not sound nearly as good as the 6N6P.
The 5687 is also a computer tube, so that makes sense.
Yeo over at www.diyparadise.com has several pages on the 5687 as a preamp tube. Looks like nice and easy stuff.
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Old 29th March 2007, 08:16 PM   #18
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I think Russian DIYers just have to wind their own transformers as they cannot get them in Russia, unless paying an awful lot of money. Instead they can get iron and wind their own trannies.
My experience is that Russian are extremely skilled when it comes to those nitty-bitty details.
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Old 30th March 2007, 12:10 AM   #19
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Seems like we *are* talking about 2 different tubes, as you clarified with the cyrillic letters. We Americans when hearing the 6H6 number tend to thing immediately of the tiny metal octal "button" tube twin diode, which is only about an inch tall.
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Old 30th March 2007, 12:53 PM   #20
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Amp86 : Raa=4*(2*2300/74)^2=15456 ohm
Amp87 : Raa=13*(2*1800/95)^2=18668 ohm
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