01-20-2015, 03:06 PM
Recapping has gone smoothly although as the Pa Dutch would say the "quality condenser" is yet. (as in not yet done)
Unfortunately it turns out that 3 of the wire wound resistors are faulty (not uncommon I understand) since they are wound on cardboard or fiber board and are rather fragile. They are the Bleeder Resistors #1 (4000 ohms) and #2 (850 ohms) and the RF Bias Resistor (160 ohms).
[Image: https://www.dropbox.com/s/xg0qyxpgow3tw3....jpg?raw=1]
[Image: https://www.dropbox.com/s/5u8h70k96ett7b....jpg?raw=1]
So unless I get really lucky and find some replacements I'm going to have to use modern replacements. So here's the question:
Am I correct in figuring that 2 or 3 watt replacements would work OK?
My thinking:
175 v (present @ plates of 1R and 2R) across 11,000 ohms (4000+6000+850+160) yields 0.016 amps.
(4000/11000)175 x 0.016 = 1.02 watts for the 4000 ohm resistor
double or triple that = 2 to 3 watts. Similarly the other 2 resistors would be less wattage.
If I'm doing this calc wrong please let me know.... thanks for the help!!
(images are from Leigh's atwaterkent.info site )
Unfortunately it turns out that 3 of the wire wound resistors are faulty (not uncommon I understand) since they are wound on cardboard or fiber board and are rather fragile. They are the Bleeder Resistors #1 (4000 ohms) and #2 (850 ohms) and the RF Bias Resistor (160 ohms).
[Image: https://www.dropbox.com/s/xg0qyxpgow3tw3....jpg?raw=1]
[Image: https://www.dropbox.com/s/5u8h70k96ett7b....jpg?raw=1]
So unless I get really lucky and find some replacements I'm going to have to use modern replacements. So here's the question:
Am I correct in figuring that 2 or 3 watt replacements would work OK?
My thinking:
175 v (present @ plates of 1R and 2R) across 11,000 ohms (4000+6000+850+160) yields 0.016 amps.
(4000/11000)175 x 0.016 = 1.02 watts for the 4000 ohm resistor
double or triple that = 2 to 3 watts. Similarly the other 2 resistors would be less wattage.
If I'm doing this calc wrong please let me know.... thanks for the help!!
(images are from Leigh's atwaterkent.info site )