[RFI] RFI Broadcast Station Mixing in Crank-Up tower?
jim at audiosystemsgroup.com
Mon Oct 19 23:00:54 EDT 2015
On Mon,10/19/2015 7:00 PM, Rich Hallman - N7TR wrote:
> Has anyone had any problems with intermittent mixing from a close broadcast station with a Crank-Up tower? I think I may have an issue with one of my towers. Cranked up I hear mixing all over 80 meters (Every 10 KC).....Cranked down its gone. I already eliminated the antennas. Mixing gets very intermittent in wind as the tower moves around.
I have no experience, so will leave most of this to others. The
fundamental cause though is less than ideal electrical contact in a
> Thoughts about grounding the top section to the bottom when fully extended?
Definitely. Should be a short fat conductor from the bottom of the top
section the top of the lower section that it mates with.
> Was thinking of grounding the coax at the top and bottom of the tower?
This is ALWAYS good practice, to prevent arc-overs between the tower and
the coax, which will fry the coax at the point where the arc occurs.
73, Jim K9YC
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