[AMRadio] Balanced tuner

[Rob Atkinson]

Those look like good modifications.  I've heard that just putting a
cap in series with the link to ground helps.  But I have never really
understood the complaining because my KW MB covers all bands including
WARC, but I must admit that I use two dipoles, a half wave on 80 and a
half wave on 20.  It makes no sense to me to use an 80 m. dipole on 10
because the pattern is so crazy with spaghetti lobes every which way.*
 Also, I had to fiddle with the feedline length for 80 meters and add
series capacitance to the series sections of the 4 section cap to get
down to 3500.  I guess to me these problems aren't that big of a deal.

Anyway, Mark, I'm curious about your TAC.  Where did you find it?
They are pretty rare.

73

Rob
K5UJ

On Fri, Apr 27, 2018 at 10:36 PM, Mark Foltarz via AMRadio
<amradio at mailman.qth.net> wrote:
> Charlie,
>   I have a Johnson KW matchbox that I picked up years ago.When I got it it was a junker. Lots of extra holes and  the cabinet was ugly.
> I believe it was used for a magazine article some years back where the tuner had 160 meters added.
> I also had trouble matching  various dipoles with it. Some worked great while others would not.
> I found this link http://www.dj0ip.de/antenna-matchboxes/symmetrical-matchboxes/j-viking-upgrade-1/
> Since the match box was sort of ugly  to begin with I took the plunge and did the mods.
> Wow, the improvement is significant. The tuner actually works well now. As well as any balanced tuner I have seen -including my TMC TAC-1,
> Just  a thought
> de KA4JVY
> Mark
>