Was out of town for a few days but now back home and proceeding with my Reverberocket repair.
Measured the speaker resistance with my VOM and got a consistent 1.0 ohm resistance. Also did the 9V battery test which generated an audible "pop" and cone deflection, thus speaker tests good.
Took pictures of the amp internals and these are shown below:
I'm certainly no amp tech but I have replaced filter caps on my Fender amps and have read several books on tube amp theory and repair. With a little coaching from those with more experience, I'm hoping to get this nice amp operational again.
The tube chart is interesting, to say the least! Note the alterations made via pen to the printed chart. The actual tube compliment corresponds to the pen-written description. Pre-amp amp tubes are 12AX7, 12AU7, etc., and are the original GE (AN) tubes, along with the 7591 power tubes which are Ampeg branded. As stated before, I know the original owner and he never had this amp serviced. Thus, I'm assuming the tube chart was altered by factory techs at the Ampeg factory.
Another interesting observation - the model appears to be an R-12-R-M...another pen revision. I'm assuming the -M designates the use of 12AX7 tubes versus what was originally printed on the tube chart?
The rectifier tube is metal-jacketed and hard-wired and firmly attached to the chassis - have never seen this before.
Here is a picture of the entire backside of the amp with cover removed. Speaker date code indicates a manufacturing date of December of 1964. Former owner purchased the amp sometime in 1965 so this checks out.
Measured the speaker resistance with my VOM and got a consistent 1.0 ohm resistance. Also did the 9V battery test which generated an audible "pop" and cone deflection, thus speaker tests good.
Took pictures of the amp internals and these are shown below:
I'm certainly no amp tech but I have replaced filter caps on my Fender amps and have read several books on tube amp theory and repair. With a little coaching from those with more experience, I'm hoping to get this nice amp operational again.
The tube chart is interesting, to say the least! Note the alterations made via pen to the printed chart. The actual tube compliment corresponds to the pen-written description. Pre-amp amp tubes are 12AX7, 12AU7, etc., and are the original GE (AN) tubes, along with the 7591 power tubes which are Ampeg branded. As stated before, I know the original owner and he never had this amp serviced. Thus, I'm assuming the tube chart was altered by factory techs at the Ampeg factory.
Another interesting observation - the model appears to be an R-12-R-M...another pen revision. I'm assuming the -M designates the use of 12AX7 tubes versus what was originally printed on the tube chart?
The rectifier tube is metal-jacketed and hard-wired and firmly attached to the chassis - have never seen this before.
Here is a picture of the entire backside of the amp with cover removed. Speaker date code indicates a manufacturing date of December of 1964. Former owner purchased the amp sometime in 1965 so this checks out.