[Kenwood] Question abt 440S Tuner

[Guillermo]

	Hello Brian:

"Brian K. Gaskamp" escribi�:
> 
> Hello all, I think my tuner may be having a problem but I wanted to pick a
> few minds.
> Sometimes when I push the At Tune the tuner will kick in sometimes it won't,
> I keep the Auto/Thru switch in Auto and yesterday I was on 17 and my SWR was
> around 2, and this morning I get on and swr is ok.

Is your antenna ok?, perhaps with weather changes a fault connection is
made evident, and so the higher swr.  Don't forget to adjust Car control
so as to have a useful output power level for AT working also.

> 
> Will the tuner try to tune the antenna every time you push the button or
> just whenever it feels the swr is too high?

	Both conditions, you must push Auto/Through to Auto, and AT tune to on,
but anyway AT starts its operation if SWR detected is more than 1.3 or
so (as indicated in service manual), although this level could be
calibrated to a higher one; a lower value for this (if you pretend 1.1:1
or a perfect 1:1) may lead to a non stop working of tuner motors,
because of its mechanical inertia, gears, etc.
	There are two preset potentiometers inside to adjust this threshold. I
advice to adjust them only if you have the skill and necessary
instruments.

Good luck
Guillermo - LU8EYW.

> 
> Can someone shed some light on my possible problem or am I doing something
> wrong.
> 
> 73,
> Brian
> 
> KA5BKG
> 
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