Topband: WD-1A wire

[jeremy maris]

Yes WD1A works very well with the conductors strapped. I've built  a 300m long reversible beverage up at about 2.4m with two parallel runs of  strapped WD1A about 50mm apart.

Impedance of this line is around 450 ohms at that spacing so transformer design is simpler than  one twisted WD1A and losses considerably less.

Jeremy G3XDK


On 7 Jun 2015, at 16:55, Roger Parsons via Topband wrote:

> I know that WD-1 and WD-1A wires are not very good for two wire transmission lines due to their high attenuation. I wonder however whether they are OK with the conductors strapped as Beverage wires? WD-1A has quite a few advantages for the bush where I run my antennas - it is strong, it is quite light, it is very nice and easy to run out, and it fits through electric fence insulators.
> 
> 
> I presume that its poor performance as a balanced line is related to the copper wires twisting with the steel ones meaning that for some of the time current is passing through the steel wires due to skin effect. On the other hand I can't see how it can be worse than galvanised steel wire or electric fence wire.
> 
> 73 Roger
> VE3ZI
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