Why/how does RF load the filaments and change the filament current? Are
you sure you know what is going on in this circuit? Why don't you tell
us what the circuit is, and what the tubes are, and we'll calculate the
filament dropping resistor for you?

Bill
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rijo1 wrote:

No Ken , the tubes are used in a RF circuit . I can't take a amp reading off the
circuit without loading the circuit with RF . That is the problem .