09-11-2014, 09:21 PM
Kirk;
The way they drew the schematic it's kind of hard to follow, but it looks like the filter capacitors are an 8 uf, a 4 uf, and a 2 uf, that is if your chassis is a first series model 62 and not a second or third series model 62. The first series Jackson Bell model 62 has an extra filter choke mounted on the chassis someplace, the second and third series do not. The B+ comes off the #80 tube, goes to the 2 uf cap first, then splits off with one going to a choke, followed by the 8 uf capacitor, the other side goes to the field coil and is followed by a 4 uf cap. Speaking of a bleeder resistor, this set has one on the end of a series of voltage dividers, unlike the Philco 18/118, it does not come right off the hot side of the B+ and go to ground.
Those caps you speak of are not in the power supply, one is between the cathode of the detector tube and ground, that is if they are both 1 uf and not a .1 uf. The second schematic shows a .25 uf in the detector cathode position, the other 1 uf is connected to the center tap of the filament winding for the #45 tube, the second schematic does not have one on the #45 winding center tap. That can may be a block condenser can with the bypass capacitors inside, this set has at least four of those, and two 1 uf caps all with one end connected to chassis.
Other then the 8 uf filter cap you could replace every capacitor in the set with non polarized film capacitors of at least 630 vdc, then you don't have to worry about polarity, but if you look closely the negative of each filter cap goes to chassis anyhow. You could with the 8 uf cap too but putting enough film caps together in parallel, and stuffing them inside the can, might be difficult.
Regards
Arran
P.S I see a note on the second schematic mentioning a dual section 1 uf block condenser being mounted on top of the chassis, at least in the second version where the filed coil is connected in the positive side of the B+ supply. This can seems to be connected in the same position as the two 1 uf caps are in the first version, one on the center tap of the #45 filament winding, and the other between the detector tube cathode and ground. Use poly film caps for this, but you will not need a pair of 630 volt caps to replace either of these as the potential is only 50 volts, so use a 150 or 250 volt, or whatever you can get that will fit in the can.
The way they drew the schematic it's kind of hard to follow, but it looks like the filter capacitors are an 8 uf, a 4 uf, and a 2 uf, that is if your chassis is a first series model 62 and not a second or third series model 62. The first series Jackson Bell model 62 has an extra filter choke mounted on the chassis someplace, the second and third series do not. The B+ comes off the #80 tube, goes to the 2 uf cap first, then splits off with one going to a choke, followed by the 8 uf capacitor, the other side goes to the field coil and is followed by a 4 uf cap. Speaking of a bleeder resistor, this set has one on the end of a series of voltage dividers, unlike the Philco 18/118, it does not come right off the hot side of the B+ and go to ground.
Those caps you speak of are not in the power supply, one is between the cathode of the detector tube and ground, that is if they are both 1 uf and not a .1 uf. The second schematic shows a .25 uf in the detector cathode position, the other 1 uf is connected to the center tap of the filament winding for the #45 tube, the second schematic does not have one on the #45 winding center tap. That can may be a block condenser can with the bypass capacitors inside, this set has at least four of those, and two 1 uf caps all with one end connected to chassis.
Other then the 8 uf filter cap you could replace every capacitor in the set with non polarized film capacitors of at least 630 vdc, then you don't have to worry about polarity, but if you look closely the negative of each filter cap goes to chassis anyhow. You could with the 8 uf cap too but putting enough film caps together in parallel, and stuffing them inside the can, might be difficult.
Regards
Arran
P.S I see a note on the second schematic mentioning a dual section 1 uf block condenser being mounted on top of the chassis, at least in the second version where the filed coil is connected in the positive side of the B+ supply. This can seems to be connected in the same position as the two 1 uf caps are in the first version, one on the center tap of the #45 filament winding, and the other between the detector tube cathode and ground. Use poly film caps for this, but you will not need a pair of 630 volt caps to replace either of these as the potential is only 50 volts, so use a 150 or 250 volt, or whatever you can get that will fit in the can.
