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Old 6th January 2013, 08:00 PM   #1
dwvinky is offline dwvinky  United States
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Default Part for Punch 75 HD

Just recently picked up a 75 HD Mosfet from the early 90s. One channel is significantly louder than the other. There is a hybrid module labeled HB-PIM that appears to have been hot at some point. It appears to be a preamp board. Has 3 op amps, couple of caps, and a handful of resistors. Some of the traces were burnt open. Repaired them and now amp is whining on channel that was previously low. Amplitude is now equal. There was a missing cap that the previous owner had just jumpered across. I'm assuming the whine is caused by too much gain probably caused by the shorted out cap. Anyway, anyone know where i could source a replacement module?
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Old 6th January 2013, 08:15 PM   #2
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The little aluminum caps leaked on those boards, eating up the traces. The boards are extremely difficult to repair. Once the fluid gets on the boards, in most cases they are junk. I have replacements. PM me and we can discuss price, payment, and shipping.
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Old 6th January 2013, 08:58 PM   #3
dwvinky is offline dwvinky  United States
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P.M. sent.
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