Cigar Box Guitar Amp

[TIMBO]

Hi guys, Completed the CBG and might I say sounds very bluesy.
http://el34world.com/Forum/index.php?topic=22282.0

So now to construct an amp.

Searching through our list of local built amps the "AMPLIVOX" looks COOL.
http://www.ozvalveamps.org/amplivox.htm

Got pretty much everything I need to build.

Thoughts on what this would sound like......

[PRR]

That has a hell of a lot of gain.

I dunno if guitars were so weak, or if those values are mis-read.

I'd think it would hiss madly if turned up, then when you play hammer the poor 6V6 senseless.

Go ahead and build it. It may work for modern headbanger styles. If too-too much, you can triode strap one of those pentodes.

[shooter]

That has a hell of a lot of gain.

my thought was the poor 6V6 doesn't have a clue what's coming

[TIMBO]

Hi guys, My schematic maybe somewhat guessed.
http://www.ozvalveamps.org/amplivox/amplivoxcct.jpg

This is the circuit that was the basis of the design and the component values were from other similar circuits that used those valves.

[John]

I'd start with 68k plate, 470k screen resistors if I was doing it. Make 'em easy to change out (or use a sub box) to find the sound you like.

[TIMBO]

Hi guys, One of the local blokes put me onto an amp out of the Radio and Hobbies mag from long ago.
http://americanradiohistory.com/Archive-Radio-and-Hobbies/40s/Radio-and-Hobbies-1942-06.pdf

The original schematic

Some values subbed with todays values.
Might work much better.

[TIMBO]

Hi guys, A good day in the shed.

[DummyLoad]

sweet amplifimacatin' jalopy!


--pete

[TIMBO]

Thanks Pete, You know all the right words to say. 

This one has fired up well.



The schematic shows a 47k/1w in the power supply, but I have a 33k in at the moment.
Would V1 benefit with a higher plate voltage, say changing the 33k to 27-22k.

Sounds good as is.

[bnwitt]

Very cool.  How's it sound Timbo?

[TIMBO]

Thanks mate, Some finished photo's.







Some sound clips.
https://www.youtube.com/watch?v=FCUwEmmxAb4&feature=em-upload_owner
https://www.youtube.com/watch?v=QohZmn_akjs&feature=em-upload_owner

[John]

Sounds great, and nice playing too!