[Amps] Why does power output increase?

[Adrian]

Would it be beneficial to TX relay shunt a FT primary VD resistor on key 
to compensate for TX volt drop to the amp,

and still maintain a 5.0v RX filament feed for extended tube life ?


vk4tux


On 5/6/22 21:35, Victor Rosenthal 4X6GP wrote:
> Yes, I found it here:
> <https://www.w8ji.com/filament_voltage_life.htm>
>
> He notes that the Eimac specs for the 3-500Z call for 4.75-5.25v.
>
> What I should do is check my line voltage (it is usually pretty close 
> to 230 here) and measure the voltage at the tube pins in standby when 
> the line voltage is at the highest expected value. Then adjust it to 
> be just under the maximum value. That way when it drops, it will be 
> more likely to stay above the minimum.
>
> So by setting it to 5.0v in standby I have been doing it wrong all 
> along! Probably 5.2v would be a better choice.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> CWops #5
> Formerly K2VCO
> https://www.qsl.net/k2vco/
> On 05/06/2022 6:25, Jim W7RY wrote:
>