I have a new Cushcraft A50-3S, 6 mtr beam, and I am having trouble getting the
SWRs down.
I measured multiple times the element lengths and set them to the 50 Mhz sizes.
I then set the gamma match to the exact sizes shown in the manual, (set and X)
but even installed on my roof away from all objects the SWR was very high, way
too high for my transceivers. I kept adjusting the gamma match and the only way
I could get SWRs down low enough to work with my rigs was to make it as short
as possible with the small rod pushed all the way inside the larger rod. But
even then the SWRs were well above 2 at 50.125 mhz? I have worked with it for
many hours and I am unable to figure out how to adjust the gamma match
correctly.
This is replacement for a damaged A50-3 I had for years, did not have problems
with the old one. The gamma match on the new one is different, on the new
gamma match the small rod does not make contact with the larger tube it slides
into. I tried two different, new lmr-400 coax runs, no change.
I sent email to Cushcraft/MFJ but they have not answers previous emails, so
don’t suspect I will hear from them. Any help would be appreciated. Thanks
Emory
WM3M
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