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...

..it'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.

2 comments:

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!