12-01-2012, 09:06 PM
Murf
It is fairly simple.
Both caps have their positives together, at the output of the rectifier tube.
Both caps are singles, judging by the sch. So if you have one that is dual then one half is propbably is not used.
Now, it does not matter as you need to replace them, so no matter how you will stuff your caps, you should have two caps, each one having one positive and one negative.
Again, both will have their positives topgether and connnected to the 80 tube's filament, the rectifier positive output.
Now, one negative from the cap #60, 10uF, goes directly to GND (chassis).
Another negative, from the cap #61, goes to the field coil, through which it connects to the GND and the coil's resistance forms the negative bias used in the output amp. This is where that mistery wire of yours went, and if you buzz it to the chassis, you will see a typical field resistance, which I cannot find but I can figure it is anywhere from 1Kohm to 3kOhms.
It is fairly simple.
Both caps have their positives together, at the output of the rectifier tube.
Both caps are singles, judging by the sch. So if you have one that is dual then one half is propbably is not used.
Now, it does not matter as you need to replace them, so no matter how you will stuff your caps, you should have two caps, each one having one positive and one negative.
Again, both will have their positives topgether and connnected to the 80 tube's filament, the rectifier positive output.
Now, one negative from the cap #60, 10uF, goes directly to GND (chassis).
Another negative, from the cap #61, goes to the field coil, through which it connects to the GND and the coil's resistance forms the negative bias used in the output amp. This is where that mistery wire of yours went, and if you buzz it to the chassis, you will see a typical field resistance, which I cannot find but I can figure it is anywhere from 1Kohm to 3kOhms.
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