Just to remove one more possibility, please use/try
another 12 volt supply. Perhaps the voltage, while
the load should be light, is dropping over time ...
Hope this helps!
73 de Billy, AA4NU
----- Original Message -----
From: "Ignacy Misztal" <no9e@arrl.net>
> > I bought TT715 used from W8EK last year. TT715 does wonders with Elecraft
> > KX3 (reports 2 S better) but has one problem. After about 10-20 minutes,
> > the lights are still on but there is not output. W8EK claims it was good
> > when he emailed to me. TT715 looks new.
> >
> > I called TT service a year ago, and they claimed it may take a few hrs
> > -perhaps more than TT715 is worth. I tried to look for weak points,
> > tapping, checking with oscilloscope, and after a few hrs I could not find
> > what is wrong. While a schematic is available,there is no component
> > placement. Diagnostics is not easy since I have to wait until the
> condition
> > occurs.
> >
> > Did anyone have a similar problem? Any idea how to fix without taking
> days?
> >
> >
> > Ignacy, NO9E
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