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Old 14th September 2005, 07:42 PM   #11
beamnet is offline beamnet  Netherlands
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my ecc99 are in a long tailed pair/direct coupled. Can i just reroute the heater and fire it up?
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Old 14th September 2005, 10:24 PM   #12
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Hi,

Quote:
6n6p = ecc99
Not really.

Quote:
Can i just reroute the heater and fire it up?
Put a DC blocking cap in before yu do so, monitor it and adjust for DC offset if needed.

Ciao,
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Old 15th September 2005, 05:39 AM   #13
beamnet is offline beamnet  Netherlands
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should be no problem, as the stage before it is coupled directly...

but, id be reaaaly happy if you'd want to elaborate on ecc99< or> than 6n6p.
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Old 15th September 2005, 06:35 AM   #14
argo is offline argo  Estonia
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Chinese 6N11 is more like Russian 6N23P-EV or western 6922/E88CC
Chinese 6N23 would be Russian 6N23P or western 6DJ8/ECC88
Chinese 6N1 is Russian 6N1P
Chinese 6N2 is indeed Russian 6N2P or as quoted a western 6AX7 (was there ever such tube?)
Chinese 6N6 is Russian 6N6P - NO DIRECT Western substitute. Nevertheless quite good tube in right application.

I think the Russian equivalents are easier to find than original Chinese tubes nowadays and as for 6N1/6N1P or 6N2/6N2P the Russian made have also these ruggerized EV versions available but Chinese dont.
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Old 15th September 2005, 06:40 AM   #15
beamnet is offline beamnet  Netherlands
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Guess that makes searching for subs easier!

The reason i keep askong about that 6n6p is that my circuit uses russian penthodes for output. I just like putting exotic things in my amp and would really like to experiment with different tubes.

And i think it looks prettier too!

i think i am going to do some ebaying
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Old 15th September 2005, 06:45 AM   #16
argo is offline argo  Estonia
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If you have trouble finding Russian 6N23P-EV, 6N2P-EV, 6N6P or even 6N1P-EV (sometimes depending on circuit it could replace 6N23P-EV and even sound better) for good prices, drop me a mail.
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Old 3rd October 2005, 10:28 PM   #17
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Hello,

does somebody have tried 2 x 6n6p in parallel (4 triodes) ?
I would like to test a grounded cathode preamplifier with 2 6n6p (4 triodes) in parallel by channel.

For one channel I think of 2x 6n6p (4 triodes) in parallel, B+ 270V, one Ra=1K7, one Rk=60 ohms for a total of 80mA
Seems to be ok with TubeCad.

Opinions ?

Best Regards

Pascal
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Old 4th October 2005, 09:27 PM   #18
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Quote:
I've had trouble finding a valve technician in Scotland, so I might have to send the amp away for repair. Any tips as to where I might go would be very welcome.
You could try Phil at Bluebell Audio - Dundee.
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Old 6th October 2005, 03:37 PM   #19
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Bluebell audio website here
or if you are near Aberdeen I might be able to help
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Old 28th October 2005, 09:04 AM   #20
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Hello,

finally, I have made some changes and my preamp is finished. Valve (5Z3) PSU 270V, Ra=750, RK=100. The 4 6n6p are in parallel with 12K input resistor and each valve has his own RK/CK. Operating point 200V/20mA
Great sound

Pascal
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