Check this out......

[Duble]

Those are the high power fenders, or is it the same transformer on both?

This amp also seems to have 2 chokes. I wish i was more knowledgeable to figure this amp out.

Can you take a pic of the bottom of the chassis? i'm sure you could get an answer if you did that, very smart folks around here

[redshark]

Ok, here.....

[Duble]

Ok, here.....

Thank you for posting all these pics of this rare example.

Looks like it has 60s era Fender Dual Showman transformers. All I see is one regular choke, not sure where you are seeing two? Only other small transformer I see is the Relay power transformer in the chassis.

[redshark]

Thanks!! I didn't know the little tranny inside that I though it was a choke was a relay transformer. Sorry for the confussion.

[Aaron]

I've been staring at these pics, and it looks like this amp is using 6CA7's from a music man power transformer?

Aaron

EDIT: Correction, it looks like the second red wire is directly under the other red and blue wires.
But the chassis looks like it has 6CA7 under the output valves.

[redshark]

The chassis says 6CA7, you are correct Aaron, but the amp is running 4 GE 6L6GCs.

[bcook]

Thanks for this redshark. I'm wondering if you have the value of the treble cap, and does the rock/jazz switch have a center detent? A picture of the pots would be cool also.

[martin manning]

Redshark, if you have access to this amp it would be useful to all if you could get a series of high-res photos, then perhaps a schematic and layout would follow...

[Max]

... from a music man power transformer?

IMO the power transformer visible on these pictures is the L022756 power transformer (Fender Twin, Showman) often used for ODS amps with a "transition generation" chassis.

Cheers,

Max

[redshark]

Thanks for this redshark. I'm wondering if you have the value of the treble cap, and does the rock/jazz switch have a center detent? A picture of the pots would be cool also.

The rock/jazz switch is a 3 way. Middle is preamp boost, up is rock, down is jazz. I will post more pics. I just replaced bias cap which I forgot about and adjusted the bias to 34 mA. and I'm done servicing.

[redshark]

Redshark, if you have access to this amp it would be useful to all if you could get a series of high-res photos, then perhaps a schematic and layout would follow...

Martin, I can take more pics but I can't draw schematic because I'm not an electronic tech. Sorry.

[Duble]

Redshark, if you have access to this amp it would be useful to all if you could get a series of high-res photos, then perhaps a schematic and layout would follow...

Martin, I can take more pics but I can't draw schematic because I'm not an electronic tech. Sorry.

Forum members will make a Schematic and Layout if you can snap some more detailed pics of the amp.

[redshark]

Dumble demo:

https://www.youtube.com/watch?v=6TAwUI71DSk

Now direct link to youtube.

[Smokebreak]

I'm a fan of that amp, as well as your playing. Thanks for the demo!

[redshark]

Thanks!! but I'm not the player!! Derek is good!!