Check your book. The older 2K floor model filament’s were in series.
Pull one, they both go out.
Sent from my iPhone
> On Jun 27, 2019, at 11:46, Ted Rachwal <tarachwal@gmail.com> wrote:
>
> All of a sudden I have a very high swr between the rig and amp...3:1.... I
> notice one of the 3500Z tubes is not lit. I'm wondering if I can pull the
> unlit 3-500Z and try the amp to see if the issue is the tube or some other
> part. I have pulled a suspect 572b and 811 in the Ameritron series of amp
> and all was ok but wonder if the remaining 3-500Z would be damaged if I tried
> this trick? Anyone have a thought here?
>
> 73,
>
> Ted K8AQM
>
>
> ---
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