[Collins] Re: [Johnson] Re: Advantages/disadvantages of an "L" tuner circ...

[Jim Brannigan]

At one time I had an 80M dipole fed with open wire line to a classic
balanced tuner (plug-in coils, split stator capacitor, link coupled) The
feed line was straight from the antenna with spring tensioners and fed thru
the wall with large ceramic insulated feed-thru's.  The tuner was mounted
right where the open wire line entered the shack.  It worked well on 80 and
40Meters.
For matters of convience I wanted to use coax feed and a T-match tuner.
The antenna was replaced with a G5RV type (plastic moulded open wire to
coax)
I could detect no difference in the antennas and kept the G5RV.

Jim


> Actually, anything other than a balanced tuner is basically useless.  Coax
> fed antennas should be impedance matched to the coax at the antenna.
> Matching the coax to the transmitter in the shack doesn't do a thing for
the
> performance of the coax or antenna.  It simply accomodates today's low
range
> transmitter output circuits. And today's commercial unbalanced tuners
using
> baluns to accomodate balanced lines are inefficient.   That leaves us
> homebrewing balanced tuners.  In my view, that's the only way to go.
>
> Jim W9TM