[Antennas] Cushcraft R7 tuning

[John Tait]

Subject: [Antennas] Cushcraft R7 tuning


Hi..

> Can anyone give me a hint on tuning the R-7.  I bought a used
> one
> and the adjustments that the previous owner had used were way
> off
> for my location.  Then I connected a ground and everything
> changed
> again.  Low SWR is on the lower freqs and 40 meters tunes around
>
> 7.070 mhz, twenty tunes at 14.100, seventeen tunes at the low
> end of   eighteen, 15 meters tunes at the low end of fifteen. Ten
> and twelve meters seem to be OK.

That antenna looks to be perfectly tuned for a CW op..

>Does one actually move the
> capacitance rods in and out?  I tried that on 10 just for
> grins and couldn't move it.

NO!!!!   If you break the seal on the trap, and water gets in, you're making
LOTS of work for yourself..
You change resonant frequencies by adjusting element lengths..

>
> I might eventually figure this out but thought someone out there
> had
> a similar experience.


Read the manual OM..!!     {:o)

73
 John EI7BA