[R-390] SWL antenna

[John Kolb]

At 04:37 PM 11/6/2006, Dan Merz wrote:

>  But I've been
>wondering about the transmission line across and inside the attic house
>about 40 feet across and down about 16 feet into the basement.  My first
>idea was to use one of the better .240 diam coax types either 50 or 75 ohms
>but then I starting reading about losses when mismatch exists and thought
>maybe RG8 might be worthwhile.  Or will I be just as well off using the
>cheap 300 ohm foam twin lead that I now use.

The RG-8 won't work any better than the smaller coax and will be
a lot stiffer and harder to handle

>  I don't expect much noise from
>things in the house but do know the current washer is a problem when it's on
>- probably has more electronic controls than the older one that I had for
>years with mechanical switching.  My current system picks that up because
>the lead-in wire drapes over toward the laundry room.  But I can hear it on
>a portable am radio operating on its internal antenna as well.  I usually
>lose interest in listening when the washing machine is running.

Coax instead of twin lead should help with pickup from local QRM such as
washing machines.  Noise of your current washer probably comes from
the motor, not the controls.




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