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davebelcher98 · July 2nd, 2009, 12:37 PM

So, I have a late 60s/early 70s Fender Super Reverb that I've had for about 5 years now (the tube chart with the serial is rubbed off and torn just where the numbers are -- and I haven't opened the chassis to look at caps and transformers...my old tech told me that he was pretty sure it was a 68, and I know it's at least a 68 because it's silverface with push/pull master).

Anyway, I have an issue with my #2 power tube (farthest from input in the circuit): sometimes when I turn on the amp, the filaments of that tube don't fire up, or other times, when I am playing for a bit, that tube will kick off (I can hear a noticeable difference both in volume and in tone -- becomes very flubby) -- when I check the power tube, sure enough, the filaments aren't glowing, and it's cold. I know the tube itself is fine.

Is this most likely a bad tube socket, or do I have to expand my options to a possible bad place in the circuit connected to this output tube? As simple as a loose solder joint?

Thanks for any help!

dave b

July 2nd, 2009, 12:37 PM	#1 (permalink)
davebelcher98 TDPRI Member Join Date: Jun 2009 Location: Ft. Wayne, IN Age: 29 Posts: 88	Tube socket on a Fender Super Reverb So, I have a late 60s/early 70s Fender Super Reverb that I've had for about 5 years now (the tube chart with the serial is rubbed off and torn just where the numbers are -- and I haven't opened the chassis to look at caps and transformers...my old tech told me that he was pretty sure it was a 68, and I know it's at least a 68 because it's silverface with push/pull master). Anyway, I have an issue with my #2 power tube (farthest from input in the circuit): sometimes when I turn on the amp, the filaments of that tube don't fire up, or other times, when I am playing for a bit, that tube will kick off (I can hear a noticeable difference both in volume and in tone -- becomes very flubby) -- when I check the power tube, sure enough, the filaments aren't glowing, and it's cold. I know the tube itself is fine. Is this most likely a bad tube socket, or do I have to expand my options to a possible bad place in the circuit connected to this output tube? As simple as a loose solder joint? Thanks for any help! dave b