I’ve got a 6ft cable between the exciter and amp, so that part is covered.
I did some additional testing tonight and now believe it’s only slightly out of
tune for 20. With a good tuner match and careful adjustment of the tune/load I
see ~1-1.5 across 40m and then 1.3-2.0 across 50m. I assume it should be higher
at the band edges?
Assuming that looks normal sorry to bug you guys about a problem that was
apparently user error.
-Warren KD5YPH
> On Mar 11, 2019, at 4:39 PM, Jim <jimw7ry@gmail.com> wrote:
>
> Make sure you use at least a 6' RG58 (or similar 66% velocity factor) jumper
> between the amplifier and the radio.
>
> Report back as to your findings then.
>
> Thanks
> 73
> Jim W7RY
>
> On 3/8/2019 6:30 PM, Warren Volz wrote:
>> All,
>>
>> I believe I have an issue with the input SWR on my SB220. It's
>> frequently around 2:1 on 40 and 20m. I believe this is not where it's
>> supposed to be. Is it worth adjusting the input coils or would it be
>> better to check elsewhere for issues? Someone suggested checking the
>> mica caps connected to the band switch. When I rehabbed this amp I
>> thought I checked those and they were ok, but it's possible something
>> changed or I didn't actually confirm they were working.
>>
>> -Warren KD5YPH
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>
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