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Atwater Kent 55C - she's singing again
#14

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 )


Messages In This Thread
RE: Atwater Kent 55C in Kiel Table - by sam - 11-25-2014, 12:17 PM
RE: Atwater Kent 55C in Kiel Table - by KCMike - 11-25-2014, 03:51 PM
RE: Atwater Kent 55C in Kiel Table - by Jayce - 11-26-2014, 01:03 PM
RE: Atwater Kent 55C in Kiel Table - by radioalfa - 11-26-2014, 10:05 PM
RE: Atwater Kent 55C in Kiel Table - by klondike98 - 01-20-2015, 02:06 PM



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