Thanks Bob, I did finally get that one, got them locked, and the receiver is nearly tuned, however no repeat as of yet. I went from a 3 beep now to a 2 beep. Looking for that.
Mathew
"Bob M." <[EMAIL PROTECTED]> wrote:
The VCO coils are only present on the UHF stations,
and as I recall, that's what you have.
Pull the RF tray out and swing the control tray up,
then turn the VCO Lock knobs to the TRANSIT positions.
This will push them down into their cavities in the RF
tray casting. On each side, lower rear, you will see
two or three holes in a triangular pattern. The upper
two are often used to hold cable ties, but the lower
one lines up with the VCO coil's slug. Insert your 5mm
Allen wrench in there - the slugs are exactly the same
as the ones in the front of the RF tray and adjust the
same. With the meter plugged in, adjust for a value of
38 +/- 2 uA on the appropriate metering pin (I think
it's pin 5 but don't hold me to that).
Perform the adjustment on the highest frequency on
both Transmit and Receive. This is the first step in
any UHF MSF5000 alignment.
Bob M.
======
--- Mathew Quaife <[EMAIL PROTECTED]>wrote:
> Ok, I think I have missed it, or misplaced it.
> Which ones are the VCO adjustment pots. All the
> manual tells me is to adjust the VCO pots, but I
> have no diagram showing which ones they are.
>
> Mathew
>
>
> "Bob M." <[EMAIL PROTECTED]>wrote:
> Cute method. I believe even the digital station can
> output some tones, although I've never heard them.
>
> Mathew also asked (originally) what else needed to
> be
> adjusted when moving the frequency. The transmitter
> is
> already wide-band and other than the VCO, it doesn't
> have any adjustments at all.
>
> The two VCOs, the five receiver mixer/injection
> coils,
> the six receiver front end coils, and the seven
> duplexer/filter coils are it (that's enough!). Of
> course you also have squelch, output power,
> deviation,
> etc, to contend with, but these shouldn't vary much
> with frequency, certainly it's a lot more stable and
> consistent than some of the radios like MaxTracs
> where
> there are 16 frequencies to adjust deviation and
> power.
>
> Bob M.
> ======
> --- nj902 wrote:
>
> > --- In [email protected], Mathew
> > Quaife wrote:
> > "...I put in the new eprom, and all it does is
> beeps
> > at me. .."
> >
>
______________________________________________________________________
> >
> > The alarm tone beeps are generated once every 10
> > seconds, and if more
> > than one alarm condition occurs simultaneously,
> the
> > various alarm
> > tone beep messages will be sent one after another
> > (separated by about
> > one second) starting with the highest numbered
> alarm
> > to the lowest.
> >
> > Each alarm tone beep message consists of a series
> of
> > tones. The
> > number of tones in the series is equal to the
> number
> > of the alarm
> > signal. Station alarms numbered 1 through 7 are
> > internal station
> > alarms and indicate faults that have been
> diagnosed
> > within the
> > station.
> >
> > These alarms correspond to the four data bits at
> > Address 12 of the
> > MUXbus, and three (BD0-BD2) of the four data bits
> at
> > address 13.
> >
> > 3 = Synthesizer unlock
> >
> > See service manual 68P81062E75, Maintenance and
> > Alignment page 9,
> > Section 6.3, VCO Adjustment Procedure.
>
>
>
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