[Lowfer] Twisted Pair as Feedline

[Paul Daulton]

Lf engineering the manufacturer of a fine line of converters , active 
antennas and preamps once sold a kit for lf transmitter that was split 
like you suggest doing. I checked their downloads and the schematic and 
instructions are not there anymore. Perhaps someone has a copy. I use 
the catv coax to run 18v out to charge the battery in my beacon. 
Duplexing the rf/dc is ok. 

Paul k5wms

Quoting Jim <w4jbm at bellsouth.net>:
> I've got a thousand feet of Cat 5 cable that's been setting around for three
> or four years now.  I was curious if anyone had looked at using twisted pair
> (such as Cat 3 and Cat 5 cable) as feedline at LFs. 
>
> I'm looking at a Part 15 beacon, so what I'd be doing is feeding a 170 kHz
> square wave and DC power to the remote final amp. I think Cat 5 is rated
> something like 100 ohms characteristic impedance and up to around a half amp
> of continuous current. 
>
> If I go with coax, I'm probably going to go for an antenna location that's
> about 100 ft. from the sack (where the oscillator, keyer, and power supply
> are). I do have a better antenna location that's about 500 ft. from the shack
> that I might try with a twisted pair feed. 
>
> Just curious if anyone has played around with this before... 
>
> 73 de
> Jim W4JBM
>
> http://www.hamuniverse.com/w4jbm/
>
> "With a soldering iron in one hand, a schematic in the other, and a puzzled
> look on his face..."
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Paul Daulton K5WMS
beacon WMS 187.492 khz qrss30/slow 24/7
Jacksonville,Ar 72076
em34wu