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Old 6th May 2004, 10:54 PM   #1
r!sc! is offline r!sc!  Serbia
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Default Tube preamplifier with PCC88

I need simple preamp circuit with PCC88 tube. Anyone?
And the power supply for that circuit will be great

Thanks.

Boban
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Old 6th May 2004, 11:53 PM   #2
DougL is offline DougL  United States
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Grab a copy of Dunans Amp Tools TDSL Personal addition. Its Free.

If you do that, you will discover that the PCC88 is a 6DJ8 with a 7 Volt filiment.

There are many 6DJ8 (also called 6922 ) Schematics to choose from.

HTH

Doug
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Old 7th May 2004, 12:21 PM   #3
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Quote:
There are many 6DJ8 (also called 6922 ) Schematics to choose from.
also called ECC88

Federico
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Old 7th May 2004, 12:32 PM   #4
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& 6N1P (Russian Equivalent)
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Old 7th May 2004, 04:58 PM   #5
r!sc! is offline r!sc!  Serbia
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Big thanks. Can u suggest me any circuit?

Boban
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Old 7th May 2004, 06:03 PM   #6
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Quote:
Originally posted by jamesjung21
& 6N1P (Russian Equivalent)
Well not quite... but still a good tube and can be used in similar circuits.

The russian equivalent is 6H23pi (aka 6N23P) which are also labeled 6922 at the factory.

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Old 7th May 2004, 06:37 PM   #7
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You can find some circuits at this sites.

http://www.glass-ware.com/tubecircuits/

Or maybe something along the lines of Morgan Jones headphone amplifier (probably pretty good as a pre-amp to)

http://headwize2.powerpill.org/proje...=cmoy5_prj.htm
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Old 7th May 2004, 06:41 PM   #8
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Not exactly simple circuits found here, but it's a start...

http://www.vacuumstate.com/schematics.htm
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Old 7th May 2004, 07:12 PM   #9
r!sc! is offline r!sc!  Serbia
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I found this circuit with PCC88. Opinion, please
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Old 7th May 2004, 07:20 PM   #10
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IMO, the biggest problem with the 6922, et al in line stage service is its "high" mu of 33. A simple common cathode block has too much gain.

What sort of a source is the line stage going to be used with? If it's a CDP, no gain at all is needed and a tricked out cathode follower buffering the level control will be just fine.
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