[Amps] Switching Power Supplies

[Tom W8JI]

> In Field Day use, with more than one station hooked up to 
> the same
> generator, there can be violent swings in the line voltage 
> as stations
> switch unpredictably between transmit and receive. A 
> regulated
> filament/heater supply could prevent damage due to 
> insufficient cathode
> temperature.

The cool down time is about the same as the warm up time 
Ian, momentary sags wouldn't hurt a thing. Personally, I'd 
use a constant voltage transformer if  it was that big of a 
deal. If I used a switcher or a current regulated/limited 
supply, I'd extend the warm up time to be safe if the 
filament supply was current limited.

73 Tom