07-26-2011, 09:50 AM
This part is called a candohm and there is no reason to replace it unless it is open or shorted to the chassis. It is a multiple tapped wirewound power resistor and will get quite warm when the set is on. If you put it back the way it was you should be fine. The voltage will go down quite a bit when this load is applied. In addition to supplying the B+, this setup also provides the filament voltage (8.5 volts)
Again refer to the model 48-360 on Nostalgia, because the diagrams are much clearer, and the two sets are nearly identical. On that diagram the candohm contains R100A, R100B, and R100C.
When it is all back together, the set should be brought up slowly using a variac this time with the tubes in it. You can monitor the filament voltage as you bring it up. Do not let it go above 8.5 volts. If the voltages are still too high, you may have to add another power resistor at the beginning of the chain (before R100A) The line voltage was a lot lower when these sets were designed.
Again refer to the model 48-360 on Nostalgia, because the diagrams are much clearer, and the two sets are nearly identical. On that diagram the candohm contains R100A, R100B, and R100C.
When it is all back together, the set should be brought up slowly using a variac this time with the tubes in it. You can monitor the filament voltage as you bring it up. Do not let it go above 8.5 volts. If the voltages are still too high, you may have to add another power resistor at the beginning of the chain (before R100A) The line voltage was a lot lower when these sets were designed.
