[TowerTalk] High power 2:1 transformer was Re: 16om vertical and the number of radials

[Joe Subich, W4TV]

> Can someone point me toward a good way to do a 2:1 downward
> transformation?
The very same 2.25:1 (trifilar autotransformer tapped between
windings 2 and 3 for the antenna with the feedline connected
to the top of winding 3) used in the common broadband "stack
match" for stacking yagis!  You may want to use 5 or 6 turns
on each winding for 160 instead of the 3 or 4 turns typically
used for 20-10 M.  In any case the theory is identical.

73,

    ... Joe, W4TV

On 2022-12-02 3:38 PM, Pete Smith N4ZR wrote:
> A somewhat related question - as the R component at the feedpoint of my 
> inverted L goes down toward 25 ohms, I've begun wondering if I should do 
> some matching at the feedpoint, rather than using my tuner in the shack, 
> even though feedline losses at 160 are relatively low.  Can someone 
> point me toward a good way to do a 2:1 downward transformation?  I 
> already have a common mode choke at the feedpoint.
> 
> 73, Pete N4ZR
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