Pull everything out of line of an individual antenna and its feedpoint. Take a known good piece of coax, attach it to one of the bands (2 or 70 cm) and see if the results improve. Work backward from there to isolate which component is having a problem. But if both bands are not working, you already know there is a problem in a common component (diplexer or shared coax from diplexer to radio).
Bob N4HY
On Tue, Jan 2, 2018 at 6:19 PM, John, 9H5G [email protected] wrote:
I’ve become aware that my Arrow may be failing. I’m less and less able to hear the birds towards LOS and sometimes it’s taking the 1st 1/4 of an FM pass to hear anything typically more than 30 degrees elevation.
I know there are many of you working at much lower elevations so I’m beginning to think I have a problem. It’s a salty environment here in C6 and there a little corrosion here and there. Sadly, I have no antenna analyser with me for UHF or VHF. I’ve already stripped it down once and cleaned everything so any advice on the following gratefully received:
What elevations is it reasonable to hear each FM sat using a THD-72 (listening VFO A). What other places might I look for reduced performance?
Thx and 73
de John, C6ATS
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