[Amps] NOS 4CX1000A test and reconditioning

[Tom W8JI]

> One of the "facts" stated on this web page is that 
> broadcast
> stations keep all their final amplifier tubes filaments 
> powered
> at all times.  I used to work at a broadcast station with
> three transmitters and we only had the filaments powered 
> to the
> transmitter in use. Were we the only one ?
>
> 73 de Mike W9OJ

I worked at three stations and consulted for dozens more and 
none of them had the filaments on all the time. What I've 
seen agrees with what you have seen.

73 Tom