Vic wrote:
> I have the following problem with my SB-1000: Although the
> plate circuit tunes 18 mhz in the 21 mhz position and 24 mhz
> in the 28 mhz position, it's not possible to adjust
> the input tuned circuit so that the input swr on both 18 and 21
> or 24 and 28 mhz will be acceptable to my exciter.
Hello Vic,
Not sure of the serial # of your SB1000. I purchased a kit
in 1989 from Portland Radio, and soon after assembly, I was
advised that Heathkit had released a new plate circuit RFC.
I was sent this FOC and the amp has operated safely on 17M
(no ant on 12M). The new RFC has a narrow diameter section
at the plate end. So if yours has a single diameter,
you may wish to try a replacement from Ameritron.
I simply moved the 15M input slug to be a compromise
between 21MHz and 18MHZ.
Hope this may help.
Martin ZL1ANJ
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