Philco model 18 (code 121) - HELP!
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City: Irvington, NY
The 32K resistor probably dissipates closer to 1 Watt. Although there is a voltage divider formed by the 32K in series with the 50K, there is also screen grid current of the RF and IF tubes being drawn through the 32K. The voltage chart shows the screen voltage at 80V, which is also the voltage at the center of the divider. 250V supply minus the 80V at the center leaves 170V across the 32K.
(170 x 170)/32000 = .903 W, so a 2 Watt resistor would be a good choice, leaving a generous safety factor.
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RE: Philco model 18 (code 121) - HELP! - by Mondial - 04-18-2013, 10:45 PM
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