[Elecraft] Choke for QRP with unbalanced antennas?

[Jim Brown]

Hi Julie,

A unun is an auto-transformer, not a choke. It is a matching device.

Does your antenna include a counterpoise?  It should -- it's a critical 
half of of an end-fed antenna, carrying return current. Without it, 
return current flows on whatever wiring is connected to your rig, and 
what that's connected to, which SHOULD be Ground, at minimum via the 
Green wire at the power outlet.

73, Jim K9YC


On 11/20/2021 10:09 AM, Julia Tuttle wrote:
> If this were a fixed antenna, I'd just slap one of the LDG RU-1:1 ununs on
> it as a choke, but they're pretty chunky -- they're rated for 100 W CW, and
> have SO-239 connectors, which would require adapters on both sides in this
> setup.
> 
> Does anyone know of a choke more appropriate for this kind of setup? I'd
> prefer something smaller (rated for maybe ~40-50 W continuous?) and
> natively BNC, so I don't need to juggle adapters.