Topband: WD-1 Wire impedance

[Herbert Schoenbohm]

The impedance of WD-1A is supposed to be around 70 ohms  as most 
telephone wire is.  The DXE boxes are designed for 450 ohms so these 
boxes are probably not the best choice for

WD1A.  DXE does now have the boxes for WD-1 at a reasonable price but 
without the switching which will require two RG-6 feed-lines. I prefer 
this anyway because in my case with the DXE 450 boxes the switching DC 
voltage seems to attract a zillion ants which somehow got into the box 
and their excrement destroyed the PC board inside. I still use both the 
WD-1A boxes and the DXE boxes for their respective antenna cable which 
are easily modified (even though DXE will not share the schematic...a 
bummer).  I found the design on line anyway before it was made 
proprietary. It is simple to make your own schematic because it is not 
that complicated.  In short taking the relay feature out on the DXE 
boxes and using equal length of 1/2 wave RG-6U the needed terminations 
is provided at my shack with a passive 12 channel Panasonic TV video 
feature that terminates all the Beverage feed-lines that aren't in use. 
These passive video switchers are very inexpensive on eBay and normally 
require only F connector to PL-259 adapters or in my case the one I am 
using has BNC connectors which makes it easier to remove the Beveridge 
feed lines as is needed.

Herb Schoenbohm, KV4FZ


On 10/10/2016 11:48 AM, Jim Cary wrote:
> I use a DXE reversible beverage system using 450 ohm ladder line which runs along a fence line between a few friendly neighbors.  However, a couple have commented that “that big wire really sticks out, especially in the winter,” so I am looking to replace the ladder line with something less conspicuous but still strong, and WD-1 strikes me as a great candidate.
>
> Does anyone know what the impedance of WD-1 is, and has anyone used it in this fashion?
>
> Any comments would be greatly appreciated to JimLCary at gmail.com <mailto:JimLCary at gmail.com>
>
> Thanks,
>
> Jim
> W2SM
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