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Ping amperex re: Hammond organs

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rdf

rdf

Member
Joined 2004
Hi amperex,

In this post

http://www.diyaudio.com/forums/showthread.php?postid=707750#post707750

you give instructions for modifying a Hammond organ chassis to make a triode 6V6 push pull. It piqued my interest but after hours of dizzying boredom sifting through Hammond schematics, tribute sites and Ebay I can't find a chassis that exactly matches your description. Most organ amps with a quad of 6V6s are biamp models with separate (and differently part numbered) bass and treble output transformers. The one or two found which are true full range didn't have a 6J5 front end, at least not on the same chassis.

Either the description doesn't match or I can't see how they're adaptable to full range use. Could I trouble you for a little more detail? Thx in advance.
 
A

amperex

Member
Joined 2005
Here is a picture of my amps. The audio transformer is different as well as the tube line-up. I used 4x 7C5 (same as 6V6) plus a 6CG7 splitter/driver.
 

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amperex

Member
Joined 2005
The choke in the stock amp are both the same size. I replaced one stock choke with a physically smaller choke next to the power transformer. I wanted a higher DCR as voltage was a little too high for 6V6 triode connected. The stock audio transformer sits in the chassis like the power transformer. All chassis of this type are black wrinkle paint. I find these amps on ebay.
 
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