[Amps] Baluns / UNUNs in QRO

[doc]

Is the impedance of of your antenna flat from 160-10M or does it
vary from below 50 Ohms to the hundreds or perhaps 1,000's of
Ohms?

The Tuner will handle that but will your plate tuning circuit?

 > Tomm Aldridge wrote:
> Rather than put an antenna tuner in series with my amp, why not add a 
> wide band RF impedance transformer to the output of the amp and go 
> directly to the feedline?  Seems that adding the plate tuner in series 
> with the antenna tuner is just compounding losses.  For example, I run 
> 450 ohm ladder line to my (non-resonant) antenna.  It is now fed by a 
> balanced-balanced tuner (2 26uH motorized rollers and 2 500pF variables 
> that can be moved from input to output as Z determines) that is fed by 
> my solid state 50 ohm out rig.  It seems to me that I could just design 
> the plate tuning circuit to match 4k to 450 and add a 1:1 current mode 
> BALUN to the output of that and be done rather than going from 4k to 50 
> to BALUN to 450 as would be the case with the current 50 ohm output 
> designs.
> 
> Am I missing something here? 


-- 
Thanks! & 73, doc kd4e

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