Hi Everyone!
Came upon this beast of an old Fisher 2 Channel AM FM Stereo Receiver 143.92541600. I believe there were sold at Sears? Built like a tank with the exception of the tuning gangs, which look like they belong in a transistor radio set!
Pre amp works fine, but the amp blew the outputs on one side. I am using the Fisher 301/401 power amp schematic as so far it seems to be the same power section? The outputs are Darlington M TR 01064-9 and 02064-9. The only subs that show up on the net are NET 247 and 248, I think I can cross reference these but would also welcome suggestions for the output replacements.
The sub that I can't find is what Fisher calls the "idle regulator transistor" and the schematic refers to it as TR 0 10565, Q 803 and 804. They are tied between bases of the outputs on each side.
Any help would be appreciated! I may also need help with other transistor subs back in the chain, which I haven't tested yet. such as Q 807 809, which are labeled TR 01063 and 02063. needless to say the DC output is high, even without the outputs in line. Thanks!
Came upon this beast of an old Fisher 2 Channel AM FM Stereo Receiver 143.92541600. I believe there were sold at Sears? Built like a tank with the exception of the tuning gangs, which look like they belong in a transistor radio set!
Pre amp works fine, but the amp blew the outputs on one side. I am using the Fisher 301/401 power amp schematic as so far it seems to be the same power section? The outputs are Darlington M TR 01064-9 and 02064-9. The only subs that show up on the net are NET 247 and 248, I think I can cross reference these but would also welcome suggestions for the output replacements.
The sub that I can't find is what Fisher calls the "idle regulator transistor" and the schematic refers to it as TR 0 10565, Q 803 and 804. They are tied between bases of the outputs on each side.
Any help would be appreciated! I may also need help with other transistor subs back in the chain, which I haven't tested yet. such as Q 807 809, which are labeled TR 01063 and 02063. needless to say the DC output is high, even without the outputs in line. Thanks!