No trem in blackface deluxe reverb

[mikep]

Hey guys, maybe you guys can run me through the process on checking my trem circuit. Here is what i have tried so far to fix the trem.
I changed the tube to a known good one.
I opened up the chassis and viewed the trem bug. When i switched the footswitch on and off there is a light on however it seems kind of faint and not blinking. Hopefully, this gives you guys something to work with.
Any and all suggestions are appreciated. Mike

[The Dude]

Check the cathode bypass cap for that tube.

[mikep]

Hey Dude,

Excuse my ignorance.
How do I check if cathode cap is good?
I'm guessing I'm looking for a certain voltage on pin 3?
Thanks,
Mike

[The Dude]

Here's a schematic link with cathode voltages. You can check those. Those caps rarely short but dry out over time. Probably the best method, if you don't have a cap tester, is to temporarily tack a known good cap in there and see if it works- or just change it/them out. You can just clip a new cap across the existing one to test. This thing is old enough there is a chance that many of the electrolytics are past it.

http://www.thevintagesound.com/ffg/s...b763_schem.gif