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Messages - jonesy013

#1
Hi Ben,
Thanks for the reply! And yes, I'd definitely prefer to send it to an amp tech, but I've had a hard time finding anyone who will or can fix it...

The circuit breaker on the PSU does trip right away when the molex connectors are removed as well. I'm guessing connecting the amp took something out when I hooked it up.
#2
Hello all,
Long time reader, but first time poster!

I've got a 75 suitcase rhodes with the 80w peterson amp, which I've been trying to get working forever without success. When I initially turned on the unit, it gave a loud hum but with no signal. Neither of the external amp outputs give a signal when I plug an external instrument into them and listen through the headphones. 

My PSU is putting out +39/+25/-39VDC on both molex connectors, and the 4pin connection (to the harp output) has the +24VDC between pins 1 and 4.

From the above, I figured it was the power amp modules that were blown and not the PSU. I bought the PSU refurbish kit from vintage vibe, including the silicon transistor replacements. I tested all the components for shorts, and tested all of the transistors (out of circuit), but I didn't find any shorts, and the resistors seemed to be putting out the resistance they were supposed to. I still swapped out the components, but didn't do the silicon swap, then hooked it up to the PSU to see whether anything had changed.

Unfortunately, nothing had changed, and in addition, as soon as I fired the PSU up (with the amp connected by the molex connector and the RCA jack), the circuit breaker tripped right away. When I reset it, it immediately did the same thing. I noticed that the .5 Ohm resistors would get really hot, but no other components.

I tried replacing the Germanium transistors with the silicon ones (with the corresponding resistor swap which comes with the kit), but there was no change, except that the 0.5 ohm resistors would no longer get hot.

At this point, I'm at a loss as to what is wrong. I don't think I made an error in doing the re-build (though I'll certainly allow for that possibility :)), and the components seem to test fine and I can't find any shorts.

If anybody is able to assist, I would be most grateful! 
#3
Hi! and thanks for the reply!

The screw is a machine screw but only half of the screw is threaded. I guess the best way to go is to make a pilot hole and try to secure the screw that way? Out of curiosity, would getting a newer version action rail make sense (or even work) as an alternative?

Thanks again for your help!

#4
Hello,

I have a 75 suitcase rhodes that I recently spent some time fixing up. It has the "old style" damper rail, with the screw in the middle of the rail which goes through a metal piece in a "T" shape.

When I put the piano back together and operate the pedal, the screw in the middle of the damper rail pops up, and only the notes on the ends of the piano will sustain, no matter how much I tighten or loosen the screw. The actual screw appears fine. I checked the screw hole and i noticed that the hole in the actual base where the screw goes (the wooden part) goes all the way through the board.

I have checked the forums here and everywhere else I can think of, but I haven't seen this particular issue anywhere. I'm not sure if I should drill a new hole for the screw to go in, or if this would cause more problems. Should I replace the damper rail with the "newer style" which has a better design? Any suggestions anyone would have would be greatly appreciated :)