[Elecraft] Looking for Auto-Balanced Tuner

[Don]

I built my own.  You can see a 'brassboard' of it on my web page 
http://www.qsl.net/k7fj/

The tuner now uses a BasicX PIC which has far more memory available than the 
Basic Stamp PIC.  The tuner works great at 500 watts when driving my 600 
foot horizontal loop through ladderline.

I plan to order a K2 case next week and will be building the tuner into the 
new case this winter.

There have been changes in software.  I no longer use it as an autotuner 
because I ran out of memory for that function but it could still be 
implemented with a little programming effort.  I found that autotuning is 
just not necessary.  The tuner is designed for manual tuning using 
inductance and capacitance up and down buttons and, once a good match is 
achieved manually, L and C are stored in memory for that particular 
frequency.  This can be done for either of two antennas (selectable from a 
menu).  The C is connected either to the output (antenna) or input sides of 
the inductors by a menu sellection and this is remembered (and retrieved 
automatically) for each frequency and each antenna.

The tuner is connected to the com port of the K2 and its settings (L, C, and 
input/output C connection) are automatically changed whenever the frequency 
of the K2 is changed.  It is a completely 'hands off' tuner.

Don K7FJ
>
> I am still wishing for a truly balanced auto tuner with one set of
> capacitors and two sets of inductors.
>
> 72,
>
> John W2XS
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