[TenTec] OT: Openwire Balanced Antenna Tuners (QST Test)

[Ken Brown]

Hi Bob,

Are you using the Johnson Matchbox to go from unbalanced (coax) line to 
balanced, and then your balanced L net between the feedline and the 
Johnson? I suspect not, but then what are you using to go from 
unbalanced to balanced? A toroidal transformer, or some sort of coiled 
up coax balun?

N6KB
> I'll take an air-wound inductor over a toroidal inductor any day, 
> space available.  The typical loss in an air-wound inductor is IR loss 
> where a toroidal has IR loss plus eddy current loss.
>
> I know one thing, my Johnson Matchbox sure does a slick job of 
> handling the open wire, balanced antennas.  My most recent tuner is 
> home brew, being a balanced L network much like the Palstar evaluated 
> in March 2013 QST.  It will easily put the 40M dipole on 160M and 
> handle legal limit power to boot.
>
>
>
> 73
> Bob, K4TAX
>