[Amps] Dual 8877 Alpha 77S final query

[Phil Clements]

> a. is it permissable to apply high voltage simultaneously to the
> filaments and plate and wait the delay time before  applying excitation?
> Eimac data sheet just mentions "cathode warm up time 180 seconds). 

That is the way Alpha does it, Ron.
> 
> b. does it make good sense to place a vacuum (or a good quality )  relay
> series installed  in one leg of the high voltage AC secondary and let
> that switch in the HV  to the rectifier board after the delay?  

Not necessary. Invest in good step-start and HV glitch protection.

(((73)))
Phil, K5PC

> 
> Thanks, Ron W2CQM/3 
>