PCL86 Tube Pre-Amp for guitar. Any Idea?

Rattlehead · 30th September 2010, 11:32 AM

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.

Cassiel · 30th September 2010, 12:09 PM

Quote:

Originally Posted by Rattlehead

Hi guys!

I just want valve clipping.

Have a nice day.

How much clipping? Crunch? Heavy distortion?

Rattlehead · 30th September 2010, 12:14 PM

Couldn't it be adjustable? If not, I prefer.... well, heavy distortion.

Thanks!

Cassiel · 30th September 2010, 12:38 PM

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.

Rattlehead · 30th September 2010, 12:40 PM

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.

Cassiel · 30th September 2010, 02:18 PM

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.

Rattlehead · 30th September 2010, 02:52 PM

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.

Rattlehead · 30th September 2010, 02:54 PM

Aaah one last thing. The one you posted uses at least 3 valves, and I only have 2.

SY · 30th September 2010, 03:01 PM

Quote:

Originally Posted by Rattlehead

Aaah one last thing. The one you posted uses at least 3 valves, and I only have 2.

Buy one more.

Cassiel · 03:20 PM

Quote:

Originally Posted by Rattlehead

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.

30th September 2010, 11:32 AM	#1
Rattlehead diyAudio Member Join Date: Sep 2010 Location: Spain	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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30th September 2010, 12:14 PM	#3
Rattlehead diyAudio Member Join Date: Sep 2010 Location: Spain	Couldn't it be adjustable? If not, I prefer.... well, heavy distortion. Thanks!

30th September 2010, 12:38 PM	#4
Cassiel diyAudio Member Join Date: Sep 2004 Location: Madrid	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.

30th September 2010, 12:40 PM	#5
Rattlehead diyAudio Member Join Date: Sep 2010 Location: Spain	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.

30th September 2010, 02:18 PM	#6
Cassiel diyAudio Member Join Date: Sep 2004 Location: Madrid	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.

30th September 2010, 02:52 PM	#7
Rattlehead diyAudio Member Join Date: Sep 2010 Location: Spain	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.

30th September 2010, 02:54 PM	#8
Rattlehead diyAudio Member Join Date: Sep 2010 Location: Spain	Aaah one last thing. The one you posted uses at least 3 valves, and I only have 2.