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How to use Russian tube 6H6
How to use Russian tube 6H6
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Old 30th March 2007, 01:46 PM   #21
soundbrigade is offline soundbrigade  Sweden
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Arrrrrrrrrrrrrrrgh! That was a lot ohms ........

Well such a transformer will be hard to find. BUT while looking for physically small amps I ran into this:
A_QRPS . I thing the 12BH7A is an equivalent to 6N6P.
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Old 30th March 2007, 06:18 PM   #22
Zibi is offline Zibi  Poland
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http://www.hammondmfg.com/125a.htm
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Old 30th March 2007, 06:49 PM   #23
Zibi is offline Zibi  Poland
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Old 6th April 2016, 06:19 PM   #24
adason is offline adason  United States
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I know this is an old thread...
Soundbrigade, have you built anything with those Russian 6N6P dual triodes? I have quite a few of these. Just for fun I used one dual in parallel as output tube with small SE output transformer, and it worked fine and sounded ok. Good as headphone amp, perhaps.
Did anyone tried to use these in OTL amp? Like those Bruce Rozenblit made with tv tubes? I could experiment with parallel tubes, even if it would have just a cap on output, but I do not want to spent too much time experimenting. Is there any schematics for OTL, I think Tim de Paravicini did something like that. Anyone?
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Old 6th April 2016, 08:58 PM   #25
fdegrove is offline fdegrove  Europe
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Hi,

Quote:
Is there any schematics for OTL, I think Tim de Paravicini did something like that. Anyone?
Could you be confusing De Paravicini for Futterman?
AFAIK, Tim D.P. is a output xformer expert.

Either way, The Futterman is a complex circuit and there are better suited valves for this purpose.

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Old 9th April 2016, 08:19 PM   #26
adason is offline adason  United States
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No, i did not mean futterman, you are right, it could not be tdp. I am pretty sure i have seen an amp at some audiofest done with many small signal tubes on the output. However i may be wrong, and it still could have had trafo on the output.
When i find it, i will scan rozenblits circuit, if it can be modified.
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Old 10th April 2016, 06:52 AM   #27
barretter is offline barretter  United Kingdom
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Tim de Paravicini did make a power amplifier with many ECC83s in parallel but it was transformer coupled.
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Old 10th April 2016, 12:40 PM   #28
adason is offline adason  United States
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Ha, thats what i remembered then. Thanks barretter.
Problem with many parallel 6N6Ps may be quite a current for heaters required.
Once i have output trafos, i will experint with two per channel first.
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Old 10th April 2016, 12:46 PM   #29
TonyTecson is offline TonyTecson  Philippines
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How to use Russian tube 6H6
for multiple output tubes series parallel operation of heaters can be used...
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Old 20th April 2016, 12:52 AM   #30
adason is offline adason  United States
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Some edcor trafos arrived, so I made simple se amplifier with 6H6P (6N6P) one dual triode per channel. I got some help from lampizator (thanks Lukasz). It works reasonably well. Here are some pics.
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