02-01-2012, 11:03 AM
A jumper is one of those wires with alligator clips on each end use for temporary hookups. You could attach one end of the jumper on the negative side of the capacitor, grip oneside of a 10,000 ohm resistor in the other jaw and then touch the positive side of the capacitor to be discharged. You may see a small spark. Hold it there for several seconds and you're all set. Of course this must be done only when set is unplugged!
If you look at the schematic, you will see the first capacitor in the B+ path from the rectifier.
Here is schematic for 48-200
http://www.nostalgiaair.org/PagesByModel...013627.pdf
The first capacitor is C101A which is attached to pin 7 (the cathode) has a value of 30 mf. I'd put a 200K or 220K 1 watt resistor there. Well this particular capacitor is ganged with C101B and C101C, but when you replace them, and you should before operating the set, you will use 3 discrete replacement capacitors as the multi section ones are no longer available.
The polarity is indicated in this schematic as curved line positive, straight line negative. Note the common negative is NOT connected to the chassis, as the B- common is not "ground."
If you look at the schematic, you will see the first capacitor in the B+ path from the rectifier.
Here is schematic for 48-200
http://www.nostalgiaair.org/PagesByModel...013627.pdf
The first capacitor is C101A which is attached to pin 7 (the cathode) has a value of 30 mf. I'd put a 200K or 220K 1 watt resistor there. Well this particular capacitor is ganged with C101B and C101C, but when you replace them, and you should before operating the set, you will use 3 discrete replacement capacitors as the multi section ones are no longer available.
The polarity is indicated in this schematic as curved line positive, straight line negative. Note the common negative is NOT connected to the chassis, as the B- common is not "ground."
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
