> > That's why 3-500Z's and similar tubes actually gas up and fail when
> > operated too "cold" for extended periods.
>
> Tom, in the SB 220, how would you suggest warming up the 3-500s, don't
> have a 1500 Watt load and the max PEP allowed is 400 Watts. Do they have
> to get "cherry red"? Ian ZS6BTE
The anode does have to show some color for proper gettering.
Normally that occurs because of idling current, or at least at times
in operation.
Don't your 3-500Z's show a little red color on the anode while keyed
just from idle current?
73, Tom W8JI
w8ji@contesting.com
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