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Cheap 3-5w tube guitar amp design - Page 2

post #16 of 24
4/27/10 at 2:59pm
for output you can use EL84, 6BQ4 or Russian 6P14P without changing schematic.
I think trans is enough for guitar amp too.
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post #17 of 24
4/27/10 at 3:12pm
Change the 6v6 and you'll change the whole tone of the amp. There's a reason guitarists love this tube. Best small power tube ever made.
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post #18 of 24
4/29/10 at 12:37am
Thread Starter 
OK, laid this out on perf board (well the parts that I have onhand) just to have a look. This is the version with the "scrap parts'. I have about $30 total with a cheap 5" test speaker (4 ohm).

Now, should I lay this out on a steel or aluminum base, or will perf 'work'? I actually need to trim about an inch of width to fit it in the case but it lays out pretty well.
LL
LL
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post #19 of 24
5/7/10 at 11:16pm
Thread Starter 

Well, I got quite an assist with some vintage parts, so I just have to move the passive components to the strip board, solder them up, then wire the connections.  ChampPlate.jpgChampWIP.jpg

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post #20 of 24
5/8/10 at 8:39am

Hi pabbi,

I think with so simple schematic you don't need pref board at all.

You have both tube sockets installed, add input jack and pots to your chassis, then secure 3 power caps somehow and choice one screw for star ground. Than simple go with other parts point to point by schematic.

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post #21 of 24
5/8/10 at 9:20am
Thread Starter 

Leo Fender thought the strip terminals were a good idea, especially since we are talking 330v, so hard to argue with. If it was 30v, maybe, but safety first. Besides, this is more old school, in keeping with a 62 year old design. It is rare we build circuits older than we are, which is way harder for some of us than we would care to admit.

 

Besides, I have always been facinated about building something on a terminal strip with the turrets.

 

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post #22 of 24
7/28/10 at 12:53am

Hey Pabbi1,

 

I was wondering how this turned out?  I am wanting to build a super small Champ clone myself.  Any advice on how to source the parts cheaply?  There is also a Micro Champ out there I thought of as well.

 

-Mark

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post #23 of 24
7/28/10 at 7:51pm
Thread Starter 

Funny you should mention this - having to get some assistance, as I am out of my depth... but, here is where I am, though I did pick up a 1950's Jenson alnico speaker to swap out once I get 'er working.

 

 

 

 champ_front.jpg

 

 

Note: This amp is NOT UL listed...

 

 

champ_back.jpg


Edited by pabbi1 - 7/28/10 at 7:54pm
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post #24 of 24
7/29/10 at 9:07pm

I may be building a Champ as well for a friend of mine.  

 

Looks great Al!

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