[Lowfer] Passive antenna transmission line maintenance....during WSPR-15
Dexter McIntyre W4DEX
dexter.mc at gmail.com
Sat Jan 26 09:08:12 EST 2013
Michael Sapp wrote:
> Hi All: Running WSPR-15 here on 137 kHz and XNS & XEB seemed much weaker than normal. At first I thought it was an A/K index event, but
> checking the propagation conditions, that was not the case. Then I remembered it's been a week or so since I floated some DC volts
> at 50ma or so to blow the fine oxide off the F-connector center pins....Big Difference....
>
In the old analog telco days a small DC current would be applied to
audio circuits to keep the connections quiet. It was called "sealing
current".
>
>
>
> (Dex does not have to worry about that....:)
I would have to go outside and open one end of the cable to apply
voltage to my antenna feed since it is a closed loop :)
Dex
>
>
> 73 Mike wa3tts
>
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