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Old 7th June 2007, 03:50 AM   #1
diyAudio Member
 
Join Date: Jun 2007
Lightbulb ebay amp

Hello guys, first off i would like to salute you all
i am so happy that i found this forum. For a while i wanted to build my own tube amp for my guitar... but i haven't got any time .

Well i been looking araund and i found schematics on some amps i like, like mesa boogie amps, Marshall, B52's, Peavey and other high end amps. However i dont want to spend a eternity tryng to locate parts and such.

I been looking in ebay and i found plenty of vintage tube amps there for a cheap price which are alredy assembled, and i also ALWAYS see huge lots of tubes for sale.

I am not really sure what to do

1) get tube amp from ebay and mod it.

(If so what should i look for?)

2) build a replica

(i looked at some schematics and some look pretty simple but transformers are hard to find for some models.)

3) someone share a schematic of a quick & easy make amp with a good sound.

(i been searching the forum but theres no decent post on a decent step by step build.)

For the time beign this is what kind of specs i am looking for:
* 30 to 100 Watts
* 4, 6 or 12 ohms speaker output
* 3 band EQ
* good clean chanel
The amp dosent really need an over drive distortion because i have a pretty good effects pedal.

Any ideas on howmuch something like this would cost?

I have a background with electronics, i understand schematics and know how semiconductors work, i have build high voltage circuits for small tesla coils and such. I been reading about tubes lately.
I will apreciate any help.



Thank you!
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Old 7th June 2007, 01:25 PM   #2
PRNDL is offline PRNDL  United States
diyAudio Member
 
Join Date: Oct 2006
There are lots of choices.

Perhaps the easiest it to copy a Fender or Marshall amp, since schematics and kits are widely available and the sound/tone are well known.

I began with a Baldwin organ amp with 6L6's on ebay and showed it to a local amp builder that sold me the parts to make a Matchless Spitfire clone (Actually, I made two and one is for sale).

Since then, I've modified two amps for guitar. One was a Heathkit amp, and the other was a very old little amp. Pictures are here
http://www.naturdoctor.com/Chapters/Amps/Ampersand.html

It does take some time to figure out what to look for in an EBay amp.

Good luck!
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Old 7th June 2007, 06:45 PM   #3
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Join Date: Mar 2007
Location: Kansas
Default PA Amp Head

I, for one, would try to find an old tube mono PA system and modify it for use as a guitar amp. You can often find them for extremely low prices (I paid $4 for a fully-functional 35W Bogen) and they require relatively few modifications, making for a cheap and easy build. Instructions on how to do so are here .
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