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Old 30th September 2010, 11:32 AM   #1
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Default PCL86 Tube Pre-Amp for guitar. Any Idea?

Hi guys!

I want to build a guitar preamp with one or two PCL86 valves.
I have two of them, I also have a transformer that I got from the same gramophone of wich i took the valves. I've got 2 output 5'6k transformers as well.

What can I do with all of this? I just want valve clipping.

Have a nice day.
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Old 30th September 2010, 12:09 PM   #2
Cassiel is offline Cassiel  Libya
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Quote:
Originally Posted by Rattlehead View Post
Hi guys!

I just want valve clipping.

Have a nice day.
How much clipping? Crunch? Heavy distortion?
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Old 30th September 2010, 12:14 PM   #3
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Couldn't it be adjustable? If not, I prefer.... well, heavy distortion.

Thanks!
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Old 30th September 2010, 12:38 PM   #4
Cassiel is offline Cassiel  Libya
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Just another question, have you heard a 5W tube amp amplifier? I'm saying this because you have the output transformers and the tubes to build a really nice sounding 4W tube amp. Then you could use a line out to drive another amp if you want to.
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Old 30th September 2010, 12:40 PM   #5
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I tried some BlackHeart amps at an store, they sound great. Its just another possibility, why not.

I have some speakers from older amps lying arround my house so... yeah, why not.
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Old 30th September 2010, 02:18 PM   #6
Cassiel is offline Cassiel  Libya
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http://licho.rowerpower.org/gitara/practic2_lite.gif

Note that ecl86 is the same tube but with a 6.3 volts heater requirement. The triode section of the PCL86 is like a 1/2 12AX7.
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Old 30th September 2010, 02:52 PM   #7
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This seems rigt to me. But I have one more question. When I plug the transformer into the mains, It creates some vibrations wich can be felt by touching the table, this is really annoying, is this normal?
And BTW, my transoformer gives 380Vac from 220Vac.
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Old 30th September 2010, 02:54 PM   #8
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Aaah one last thing. The one you posted uses at least 3 valves, and I only have 2.
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Old 30th September 2010, 03:01 PM   #9
SY is offline SY  United States
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Quote:
Originally Posted by Rattlehead View Post
Aaah one last thing. The one you posted uses at least 3 valves, and I only have 2.
Buy one more.
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You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
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Old 30th September 2010, 03:12 PM   #10
Cassiel is offline Cassiel  Libya
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Originally Posted by Rattlehead View Post
Aaah one last thing. The one you posted uses at least 3 valves, and I only have 2.
That schematic could be modified using the extra pentode section (triode connected) as a cathode follower driving the tone stack and you won't need another tube but it won't do heavy distortion.

Last edited by Cassiel; 30th September 2010 at 03:20 PM.
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