[Elecraft] Tuner efficiency question

[Stephen W. Kercel]

Stuart:

The Johnson differs from modern balanced tuners in that it used link 
coupling (a tuned transformer with inductive coupling) rather than a 
matching network.

It also had the advantage over home brew link couplers that you tuned it 
with knobs instead of moving little clips around on the big coil.

73,

Steve
AA4AK



At 02:14 PM 5/13/2005 -0500, you wrote:
>The MFJ balanced tuner has a double tee network to give the most range of
>adjustment.
>
>Note even the vaunted Johnson Matchbox did not cover all of today's bands
>and impedances.
>
>-Stuart
>K5KVH
>
>
>
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