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Re: Topband: Restistance of wire

To: Martin <>, "" <>
Subject: Re: Topband: Restistance of wire
From: Bill Wichers <>
Date: Wed, 3 Dec 2014 15:35:13 +0000
List-post: <">>
With some quick calculations and a check of a chart of wire gauge and 
resistance, that 25 ohms for 400m is about 19 ohms/kft which works out to 
something between 22 and 23 gauge copper wire. I don't have exact specs for 
WD1A handy, but I think it's probably close to something in the 22-24 gauge 
range since it's a mix of copper and steel strands but is physically close to 
about a 22-20 gauge wire.

The resistance you're seeing seems about right to me. Note that many 
multimeters aren't very accurate in the low-ohms range (you really need a 
4-wire ohmmeter for that), so you're resistance will vary a bit from what any 
charts of wire resistances tell you.


> -----Original Message-----
> From: Topband [] On Behalf Of
> Martin
> Sent: Wednesday, December 03, 2014 8:25 AM
> To:
> Subject: Topband: Restistance of wire
> Topbanders,
> i have a spool of twisted wire for military field telephone use, similar to 
> WD1-
> A . It has some strands of copper and some strands of steel.
> I built the reflection transformer and installed both the transformer and the
> wire . The length of the beverage is about 200m. To my surprise i measure
> about 25Ohms with a Multimeter at the feed end of the beverage.
> So there is 200m one way, the transformer, and 200m back = 400m of wire.
> I believe 25 Ohms is way to high for 400m?
> Any advise welcome.
> --
> Ohne CW ist es nur CB..
> 73, Martin DM4iM
> _________________
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