[Antennas] Link Coupled Tuner Question

[Steve]

I built a 160 meter link-coupled tuner last year. Started out with lots 
of capacitance in the primary and saw the same insensitivity you 
describe. I ended up using a 1500pF variable that is about half-meshed 
and its tuning is "sensitive".

My experience may not apply to your situation though. I'm feeding an 80 
meter dipole and using the series arrangement shown in Figure 4 of 
Cebik's web page at http://www.cebik.com/link/link4.html.

Not sure why the primary capacitor is so much lower than suggested in 
Cebik's (as well as others) writings.

Good luck.

Steve K8JQ

Joe Giacobello wrote:
> I am considering building a link coupled tuner for 160M.  I am checking 
> out components by crudely "bread boarding" with clip leads on the bench 
> using fixed resistors for loads.  Although I am able to get to a 1:1 
> SWR, I am observing that the series link capacitor seems to have very 
> little effect on the SWR.  I am using a 500 pF variable paralleled with 
> about 2000 pF of fixed capacitance for the series capacitor. Is this 
> relative insensitivity for the series link typical?
> 
> 73, Joe
> K2XX
> 
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