[Amps] GU74 and all voltages on the same transformer?

[Bill, W6WRT]

ORIGINAL MESSAGE:

On Mon, 12 Oct 2009 09:23:26 +0200, Ulf Tjerneld <star at frizon.org> wrote:

>. Will my tube break if I apply screen and plate  
>before the tube is heated?

REPLY:

No. Voltage alone during warm-up will not harm any tube I've ever heard of.

However -- do not allow any plate or screen current to be drawn by the tube
until warm up is completed. That can damage the cathode. Just keep the tube
biased well into cutoff during warm-up and you'll be ok. 

73, Bill W6WRT