Re: [IRCA] [NRC-AM] Building a "state of the art" MW DX station

["Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>]

> Understood. I'm thinking of investing in some DX Engineering "Receive 
> Feedline Current Chokes" DXE-RFCC-1 which retail for $64.95 each. I'm 
> hoping this will eliminate any common-mode noise along the feedline. Plan 
> is to place one near the antenna, and another near the receiver.

There have been a lot of experiments on eliminating noise captured by the 
antenna feed line.  I've tried toroid filters, as have other people.  One 
thing that does show a good improvement is using a balanced line instead. 
Many use speaker cable, twisted, and with baluns at each end.  I've used 
CAT5 ethernet cable and found a noticeable improvement of lower noise and 
also less ingress of radio signals not from the antenna itself.

Speaker cable is used by a lot of serious antenna experimenters.  The baluns 
are easy to make and not expensive.  I'd recommend trying that instead of 
coax cable from the antenna to the receiver.

Craig Healy
Providence, RI

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