Sounds like the diodes and coax are rectifying RF from some strange,
outside source.
Try putting bypass capacitors across the diodes in the remote unit.
73
Don
N8DE
Quoting K0YR <k0yr@tomrieff.com>:
T/T,
This RCS4 has a built in power supply. No wall wort. When switching
unit is brought in to the bench, there is no noise, only when placed at
the tower. Noise goes away when power is off or in the #4 default
position.
Just curious if anyone has experienced this before???
Tom, K0YR
On Mon, Nov 24, 2014 at 2:58 PM, K0YR <k0yr@tomrieff.com
<mailto:k0yr@tomrieff.com>> wrote:
TT,
I inherited a RCS4 Antenna Switch from an estate.
When first installed it generated noise when using the 1,2 or 3
switch positions. The default is #4.
Did some Google'ing and found discussion about corrosion on the
SO239's mounted to the base plate.
Ran a ground wire across the SO239's to the circuit board. Cleaned
up some of the other connections.
All seemed well and much improved. This past weekend the noise
returned and was sometimes intermittent.
Switch is located about 450 feet out at the towers. Fed with 7/8
hardline.
This unit was manufactured in 1992, so could be anything.
Any thoughts on what I may be missing or failing in the switch to
eliminate the noise.
Tom, K0YR
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