Van,
Temporarily disconnecting cables to a few of the stations may
help isolate some cables that could be resonant to 20m.
I would suggest bypassing the speaker leads right where they enter
the chassis with some 0.01mfd disk capacitors. Also, check to be sure
that
the intercom cables to the various stations are of twisted pair, not
parallel
wiring.
Single-point grounding is also important....I don't know the layout of
the
MC 602, but assuming that it uses a metal chassis/case, you might
try grounding the chassis/case if it isn't already grounded.
Try the easy stuff first...go from there.
73,
Charlie
N0TT
On Sat, 21 Aug 2004 13:09:26 -0400 "Van Fair" <giw@bellsouth.net> writes:
> My next door neighbor has an houswide intercom system that picks up
> my 20 meter SSB signal and sends it all over his house to 10
> speakers. The radio in it is turned off but it does have an antenna
> in the attic. The unit is supposed to be a high end system by M & S
> in texas model MC 602. The unit cant be turned off as it serves as a
> door bell and has no off control. I knock him out of bed if I
> transmit late at night!!! Anyone have any thoughts on how to handle
> this problem. Neighbor is 100% cooperative and knows it is not my
> fault. I run 1kw on 20 and it mailnly affects him when I turn my 4
> El Steppir towards his house. My guess would be that the RF is being
> picked up on the speaker or AC wires and brought into the amplifier.
> What can he or I do to the unit to stop this from happening. Thanks
> Van W4GIW
> _______________________________________________
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>
>
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