junglejuice said:
yep it looks pretty old! i tested it and found that one channel works fine but the other channel has a bad fet (buz102) and a blown internal fuse. then i think i broke a .2 ohm large resitor from the board when i tried to pry the fuse out. oops! the fuze is a 6 amp 32v short fuse. anyone know where i can find those relatively easy? i think it was made by Little Fuse?
Perry Babin said:
i already ordered the fets and i'll try autozone for the fuze. as far as the resistor goes, i have some 3 watt .15 ohm available. the one i broke off measured .2 ohms. will the .15ohm be ok or will i need to change all of them to .15 in that case? most amps i've seen have large .1-.15 ohm resistors anyways. maybe my reading was off on the existing resistors??
What was the color code on the one you broke?
I seem to remember at least one series of punch 75 that had 22 ohms near the outputs but I think those used BJT outputs. I don't remember any punch amps with 0.2 ohm resistors. It's likely they are 0.1 ohm. If so, the 0.15 would be OK temporarily but you need to replace both of them if they are used with transistors that are operating as a parallel pair. If the amp works, you should replace the 0.15 ohm resistor with the correct resistor before you put it back into daily use.
I seem to remember at least one series of punch 75 that had 22 ohms near the outputs but I think those used BJT outputs. I don't remember any punch amps with 0.2 ohm resistors. It's likely they are 0.1 ohm. If so, the 0.15 would be OK temporarily but you need to replace both of them if they are used with transistors that are operating as a parallel pair. If the amp works, you should replace the 0.15 ohm resistor with the correct resistor before you put it back into daily use.
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