Topband: Twin Lead (Speaker Wire) Loss?

Telegrapher9 at aol.com Telegrapher9 at aol.com
Wed Dec 20 09:42:50 EST 2006


Speaker wire and AC line cord (zip cord) are close to 100 ohms. The ARRL ran 
some loss tests on zip cord 10-15 years ago and reported fairly high losses. 
On top band RX this should not be an issue. 

The loss can be measured using a network analyzer. If you need the loss 
measured I can do this for you. 

I would recommend RG-174 coax. It is small, light, and inexpensive. The 
center conductor is, I think, #26 wire. It has polyethylene insulation. It is 
available at Digikey.com.

RG-178 or RG-179 are better (lighter, stronger) but run about $1 a foot. They 
are Teflon cables. 

     Dave WX7G


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