[Heathkit] SB200 SWR Meter

[Ron W4BIN]

  Bruce Hudler WK3A via Heath-kit wrote:
> Been working on a few SB200's lately and have a question on the SWR meter. Over the years I've not really paid any attention to them, as I guess we all have better things to measure with.
> The amp I'm working on seems to be not very accurate with the SWR on the antennas and the HN31 dummy load. It reads 1.5 to 1 on the dummy load. Even higher on antennas.
> This circuit and components are used in other stuff so I'm sure there are millions of them out there.
> Reworked the circuit with new 1N191 diodes, 100-ohm resistors ok, re centered the rods and measurements. No difference. Checked a couple of different bands, not much difference.
> Not much there, maybe they are all that way  :)
> Any thoughts? Thanks

   I don't know, but could the bridge be set up for 75. Ω?

-- 
    Ron  W4BIN - Understanding is much better than
                                       knowing how.MX