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. -Bill > -----Original Message----- > From: Topband [mailto:[email protected]] On Behalf Of > Martin > Sent: Wednesday, December 03, 2014 8:25 AM > To: [email protected] > 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 > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
