A valve pre amp for my disco and electric guitar. - diyAudio
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Old 12th June 2008, 12:15 AM   #1
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Default A valve pre amp for my disco and electric guitar.

Just finished a small project with an ECC83 used in a pre amp for a disco and an electric guitar.

There are two input stereo channels mixed into one channel.

There is another line level input which I use with an MP3 player.

There is mic input which uses half of the ECC83 for extra gain before going into the other half of the ECC83.
The mic input works well with an electric guitar, I get that nice raw valve sound when its driven hard.

It was a design I did myself.
Had a few problems with hum which was partly due to lack of power supply decoupling and also bad routing of wires near mains wires.

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Old 12th June 2008, 06:59 PM   #2
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Looks good!

BTW, what's a disco? Of all the meanings for disco used on this side of the big pond, none involve pluggability into a preamp
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Old 12th June 2008, 08:52 PM   #3
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Quote:
Originally posted by leadbelly
Looks good!

BTW, what's a disco? Of all the meanings for disco used on this side of the big pond, none involve pluggability into a preamp

A disco in the Uk is a place where they play music CD's and people dance and drink. I run a mobile set up.
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Old 12th June 2008, 10:32 PM   #4
Merlinb is offline Merlinb  United Kingdom
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Now all you need is a white suit with flares, and a floor made from flashing coloured squares!
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Old 12th June 2008, 11:44 PM   #5
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Quote:
Originally posted by Merlinb
Now all you need is a white suit with flares, and a floor made from flashing coloured squares!

lol !

I usually work in jeans and a T shirt as the gear is a but grubby.

I just have to be a bit careful with the mixer in the back of the car with the valve sticking out of the top. If something moves and hits it there could be a problem and I dont want to have to keep unplugging the valve every time I move it.
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