I am currently running the MASTR-II PLL exciter on 146.640 MHz. I am
running the G2 version and have never been able to find a ferrite core
to replace the aluminum one. It is alot easier to tune than the
multiplier board. Still I can only get the tune test point voltage to
3.6 volts and that is with the slug removed from the form. Recently
had a problem where it was being "ghost keyed" with a voltage that
would creep up to 1.2 volts on the TX osc line to the exciter. This
was traced to a bad PNP transistor in the station control module,
which was replaced with a radio shack MPS2907.
On Sun, 19 Dec 2004 15:39:19 -0800, Neil McKie <[EMAIL PROTECTED]> wrote:
>
>
> That was several months ago. I don'd remember what frequency we
> did tune it to ... although I'd want to believe it was the
> operating channel frequency.
>
> After changing the exciter away from the PLL to the crystal/ICOM
> version, it worked.
>
> Neil
>
> Kevin Custer wrote:
> >
> > Neil McKie wrote:
> >
> > > The following is not meant to upset anyones view on the Mastr II
> > > PLL exciter ... but ...
> > >
> > > A friend brought his hi-band Mastr II Station to me for tune up
> > > some months ago. It had a PLL exciter on board. We tuned, reset
> > > the VCO voltage according to the manual and finished the
> > > transmitter which is what he wanted.
> > >
> > > We tuned up the receiver, got the repeater operating, set
> > > frequencies, levels and he departed.
> > >
> > > Came back a coupe of weeks later complaining the PLL exciter was
> > > unstable - sometimes didn't have any output. So, we finally yanked
> > > the PLL exciter out, removed the ICOM and tossed the exciter board
> > > into a corner.
> > >
> > > Then I went into the back room and grabbed a brown handle Mastr II
> > > mobile, pulled the exciter board out, swapped the crystal from the
> > > PLL ICOM, stuck it into a 5C ICOM and installed the exciter into the
> > > equipment. Tuned it up and he left. That took care of that.
> > >
> > > Never did figure out what the problem was with the PLL exciter
> > > board.
> > >
> >
> > What frequency did you tune the exciter to?
> >
> > Kevin
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
> Yahoo! Groups Links
>
>
>
>
>
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