I would encourage ya'll to get the proper manual for the vhf msf-5000.
The PS puts out 28v and 14v, with the 125 watt and higher pa's needing 28v.
The low level drive pa between the two vco's will put our 1 to 9 watts, happier
at 2-4 watts. RB website has some msf articles to trick the llpa to a given
power out.
.
.
Bill
Atlanta
.
.
.
.
--- In [email protected], "Ralph S. Turk" <w7...@...> wrote:
>
> Looking for more information on the "Control Head". I have several CXB's
> without PA's.
> I will be using a Micor PA with external circulator. Looking for information
> on the feed back comming
> from a MSF PA to the exciter.
> Ralph
> ----- Original Message -----
> From: "wb6dgn" <wb6...@...>
> To: [email protected]
> Sent: Tuesday, July 6, 2010 7:55:02 PM
> Subject: [Repeater-Builder] Re: MSF-5000 information needed
>
>
>
>
>
>
>
>
> The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt
> source and two lower current 13.8 volt sources, fused at 6.3 amps each. There
> is also decoupling and filtering on a "distribution board" which also
> provides overvoltage and overcurrent protection. Depending on your "12 volt"
> source, you may want to find a "parts donor" power supply and adapt that
> distribution board to suit your needs. The lower power (150 watt and below)
> stations do not use any supply voltage above that 13.8 volts, however. One
> thing that you will need, however is what Motorola calls the "Low Power
> Control Head". This is a rather deceptive name for a rather simple device
> that senses forward and reflected power and sends that information to the
> power control circuitry in the RF tray. This information is normally located
> on one of the RF amps. (I forgot which) but when the PA's are not used, the
> "control head" performs that function. Schematics of the power supplies and
> the "control head" should be on Repeater Builder TIP pages or they can be
> found in most of the MSF service manuals. Good luck, Tom DGN
>
> --- In [email protected] , "Robert Pease" <robp@> wrote:
> >
> > I was given an MSF-5000 for VHF, without the power supply or the PA,
> > just the rf deck and the control deck.
> >
> >
> >
> > I want to use it for a small on site repeater for linking in an EmCom
> > vehicle. My understanding is that it will put out about 5 watts without
> > the PA. Are there any problems with using it this way and what do I need
> > for DC power, I would love to run it directly off the 12V battery bank
> > that runs the other equipment.
> >
> >
> >
> > I haven't even started looking at it, it is in the garage waiting the
> > time, but with the time approaching I thought I would send our a request
> > and get some info before I jumped on it.
> >
> >
> >
> > Thanks - KS4EC - Rob
> >
> >
> >
> > Robert Pease
> >
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> > number of electrons were terribly inconvenienced.
> >
> > Think before you print!
> >
> >
> >
> >
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