[Heathkit] Screen dropping resistors (was DX-100B on Phone - bad audio distortion /oscillation)

[Rick Poole]

At 12:54 AM 12/16/2011, lee wrote:

 >>>>>
>If they have two 10 watt resistors in series and you have 11 watts 
>through the chain of 2, you only have 5 1/2 watts through each 
>resistor as each resistor is dropping the voltage by 1/2 the total 
>amount.  In other words, two 10 watt resistors in series gives you 
>one 20 watt resistor.
<<<<<

No, it's nominally 11 watts each.  Power dissipation is a total of 
just a bit under 22 watts total through the chain of two... voltage 
drops from about 840 (HV) to about 187 (screen voltage) for a 
difference of 653, square that and divide by 20K and you get about 
21.3 watts, divide by two is 10.66 watts per resistor.

Rick WA1RKT