- #36
jim hardy
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Where is that ?John1397 said:I connected 8 ohm speaker where it normally would connect
Where is that ?John1397 said:I connected 8 ohm speaker where it normally would connect
Okay when troubleshooting you must resolve things that defy logic one by one until the mysteries are all gone.John1397 said:I drew up three different speaker hookups and voltages around output transistor.
I found this online a genuine delco book that drawing is right . I measured 0.8 ohms across this . On one side of this device on the circuit board it says fuse and the other side it says res. It is kindy 3/35" diameter 3/8" long looks like in metal can has cotton sleeve over the outside. I thought it was a thermal type fuse to protect the output transistor.jim hardy said:Is there something missing from your three sketches ?
View attachment 231732
does that say ".47 fuse" ?
Where'd you get that drawing ?
John1397 said:I seen online some one wrote when changing geranium to silicon double resistor value from base to collector. Mine is 22k so if I change to 44k should work?
Can't argue with success, can you ? Must feel great to hear it playing .John1397 said:I finally decided to inject audio signal at volume control to see if amp part works rather than fixing every thing and it did so I then connect signal from radio and it worked.
Got a Picture ?John1397 said:Found the on off problem anyone fixing these watch for tab punched out of top cover so it doesn't touch circuit board and short out signal. The tab bent down on cover about 1/4" should go on part of circuit board with no foil.