The input networks are only for 10-15-20-40-80m bands.
73 Jim
---------
Vic K2VCO wrote:
> Thomas Tanbäck wrote:
>
>>Is it safe to tune up a Heath SB-200 on 30-17-12 M bands, in view of the HV
>>rf choke?
>>I assume the input bandpass filters is proper adjusted for this bands...
>
>
> Possibly not on 17 M. But in any case you can check this with a grid
> dip meter. Temporarily solder a jumper across the choke and then (with
> power off, of course) look for a resonance. If it is within a MHz or so
> of the frequency at which you plan to operate, you may have a problem.
>
> If you have an antenna analyzer you can accomplish the same thing by
> disconnecting the plate side of the choke and (no jumper this time,
> obviously) measuring the impedance of the choke. Look for dips
> indicating series resonances.
>
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