Friday, December 30, 2011

Hammond organ tube amps! Crusty AO-29 (M3-M100) in foreground, cleaner AO-14 (M2) in background. I know which one I would feel more comfortable plugging in...'s not what you would think by looking at this picture.

7 pin miniature, B7G, heptal, small button. Too much cool nomenclature, if I had to pick one, it'd probably be "small button", just to pare down those who would know what I'm talking about..

AO-29 guts. Pretty clean considering the blanket of dust top side. Healthy amount of in/out going on at the bottom of the frame

AO-14 guts. Let's take a closer look.

Coupling capacitor failure. Interesting failure mode without the presence of burn marks or signs of violent expansion, looks more like to just extended its innards, like a push up popsicle.

However, the mica domino that was bypassing AC mains hash followed a different path to failure.


pearshapedhuman said...

Looks like A029 has some extra iron there on the left (guts photo).

Ha, that popped cap is pretty weird. Never saw that before!

crochambeau said...

I had another look and it does appear that there are two single ended transformers there... yoink!