[Amps] SB-200 on WARC

[Jan Erik Holm]

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.
>