>
>I have an unusual situation that has developed with my 77SX. When in the
>high voltage (SSB) position, the grid and plate current meters indicate a
>slight reading, without drive being applied. No power output is
>indicated.
> When in the low voltage position, with no drive, there is no indication on
>either the grid or plate meters. The high HV tap provides 4000 VDC and the
>low voltage side is 2600 VDC. The amp appears to be working normally and
>providing the typical output. Do I have a tube or tubes going out ? Thanks
>for your input and thoughts. Tom K4XG
>
I would test the tubes on a HV breakdown tester to determine if the tubes
or the amplifier is the problem.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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