[TenTec] LDG Autotuner

[Michael Gusky]

Likewise, I had a very similiar problem with my Pegasus and the
AT-11.  The LDG is still in use, but I am thinking about going back
to a manual tuner and putting the AT-11 on the shelf.

73
Mike
K5UX


--- David Drew <ddrew@pacifier.com> wrote:
> 
> I noticed the same problem and diagnosed the AT-11 as the culprit
> on 80 CW 
> just as mentioned. The AT-11 has been sitting my shelf ever since.
> Now 
> using TT-253 which is just great..
> 
> Dave W7DPW
> 
> 
> 
> At 08:22 PM 1/11/01 -0500, Scott Walker wrote:
> 
> >I find it interesting that TT may be selling the LDG
> >autotuner, considering the problem I had using it in my
> >Omni VI station.  I built one of them from a kit about
> >2 years ago.  It went together very well and performed
> >as advertised.  However, I noted an increase of QRN when
> >operating full QSK CW with it.  I became very sensitive
> >to internally generated noise in my shack because of
> >this, and at first I did not realize it was the
> >autotuner.  I simultaneously had a problem with the Omni
> >6 "hearing itself" when certain parts of the front-panel
> >display were active, and TT told me to add a bypass cap
> >on the low-level board to fix that.  There was still
> >another source of noise, and when I switched back to my
> >old TT 4229 antenna tuner, that noise
> >disappeared.  I called LDG, and with some discussion they
> >speculated that I was hearing the processor in the
> >autotuner between each CW character as the AT-11 sensed
> >the SWR on the feedline.  This was most obvious on
> >80-meter CW, where I operate daily (NTS nets).  The only
> >solution was to defeat the autotune function entirely
> >by lifting a diode lead (switching it to manual does not
> >override the SWR autosensing) making the processor sleep.
> >I decided this was too much trouble and have stayed with
> >my old tuner.  I made TT aware of this problem.  So my
> >point is, I might be the only guy who had this
> >problem.  I will be interested to hear results as more TT
> >users try out this autotuner.
> >73.
>
>**********************************************************************
> >  Scott Walker
> >  New Cumberland, Cumberland County, Pennsylvania USA
> >  E-Mail: N3SW@worldnet.att.net
> >  CW: -.  ...--  ...  .--
> 

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