04-24-2012, 07:34 AM
OK Chuck
Looking at the 37-61 schematic...I see three electrolytics.
The input filter, (44) on the schematic, connects differently from the other two in that the negative does not connect to ground - it connects to B- at the center tap of the high voltage secondary. The negative leads of the other two electrolytics (42) and (20) connect to ground.
The positive lead of (44) connects to the junction of one of the 5Y4G filament terminals, one leg of resistor (19), and the green-white-tracer lead of the speaker field coil.
The positive lead of (42) connects into the set's B+ distribution line by way of the other side of the speaker field coil and the white lead of the audio output transformer.
The positive lead of (20) connects to the junction of resistors (13) and (19).
If the electrolytics mounted where (44) and (42) were originally placed have multiple wires coming out of them, then they are not the original cans.
Hope this helps.
Looking at the 37-61 schematic...I see three electrolytics.
The input filter, (44) on the schematic, connects differently from the other two in that the negative does not connect to ground - it connects to B- at the center tap of the high voltage secondary. The negative leads of the other two electrolytics (42) and (20) connect to ground.
The positive lead of (44) connects to the junction of one of the 5Y4G filament terminals, one leg of resistor (19), and the green-white-tracer lead of the speaker field coil.
The positive lead of (42) connects into the set's B+ distribution line by way of the other side of the speaker field coil and the white lead of the audio output transformer.
The positive lead of (20) connects to the junction of resistors (13) and (19).
If the electrolytics mounted where (44) and (42) were originally placed have multiple wires coming out of them, then they are not the original cans.
Hope this helps.
--
Ron Ramirez
Ferdinand IN
