Topband: Common mode choking of beverages

[N5KM - Kris]

 Hi Jim,

I made a few of the RX chokes from your Chokes and Isolation
Transformers for Receiving Antennas paper using CAT5 twisted pair.
Why is it that these RX chokes are OK with twisted wires while the
TX chokes described in A New Choke Cookbook for the 160-10m Bands
admonishes that the paired lines do not get twisted?

73,
Kris N5KM

On Tue, 6 Oct 2020 14:18:58 -0700 Jim Brown wrote:

CAT5/6/7 cables consist of four 100 ohm twisted pairs, each with a
different twist ratio to minimize crosstalk between the pairs. Indeed,
there is nothing inferior about it as a feedline as compared to coax,
except that it may see its Zo modified slightly if it's laying on the
ground or very close to another conductor. CAT5/6/7 pairs have fairly
low loss.

Bottom line -- nothing wrong with what you're doing. You're just smart
enough to know that it is a perfectly good way of feeding a Beverage.

73, Jim K9YC