Topband: Probably-dumb question re current mode chokes on RX antennas

[Jim Brown]

On Tue, 19 May 2009 06:39:58 -0400, Pete Smith wrote:

> I am thinking about a choke combining two 
>toroids such as you describe with a ground in the middle, as ON4UN 
>advocates (but using bead chokes).  

The T-section sort of thing you're describing would be more important if 
you were using beads rather than coils. With the relatively high 
impedances you can achieve on 160 with 7-10 turns through that "big 
clamp-on," one choke is probably enough. But two certainly doesn't hurt. 

My Beverage feedpoints are 300 ft and 400 ft from my shack, and they're 
reversibles using DXE hardware. I'm using a choke on each end of each 
feedline. At the shack end, it's on the ground outside the shack (which 
is only about 20 ft from my TX vertical). 

73,

Jim K9YC