Thanks for the fast replies!
I will have to see what I can find on that resistor for the mic hi
connection.
Dennis
--- In Repeater-Builder@yahoogroups.com, "skipp025" <[EMAIL PROTECTED]>
wrote:
>
> Hi Dennis,
>
> Everything you need is right on the top row of screw
> connections (plus a number of things you don't need).
>
> I labeled all the connections on the top with a fine
> point sharpie marker.
>
> There is a small 600 ohm (telephone) line driver board
> option, which most often lives on the chassis where
> supplied... many people use it for the controller
> receive audio source [it can supply sub tone filtered
> (PL, CG or CTCSS) de-emph and gated receiver audio
> to the external controller] when properly terminated
> to a resistor.
>
> If you don't have the line driver board, you end up
> using the (terminated) speaker audio or ungated -
> unfiltered discriminator audio.
>
> COS is available on the screw terminals... be carefull
> as the AC Mains screws are nearby. You should add some
> type of safe shield or cover over the AC Mains ("mains"
> makes you think I'm from England/Europe... eh?) unless
> you're really carefull and trust yourself near exposed
> ac contacts.
>
> TX Audio is a bit tricky, there is a diode switch in
> the tx audio path that needs a resistor to + positive
> voltage to turn it on (bias). The answer is just a
> resistor from the 10 or 12 volt supply to the proper
> mic-hi terminal connection... it's been more than 5 min
> so I'd have to go find a Master Pro in the way back...
> to tell you the exact resistor value & connection I used.
>
> If you don't make the mentioned resistor/bias connection,
> the tx line in audio will sound distorted.
>
> A small fan moving light air over the power supply
> back side will make the filter capacitors much
> happier as they live near some very hot bleeder
> resistors.
>
> Good luck, enjoy the Master Pro and pray you're not
> paying the electric bill.
>
> cheers,
> skipp
>
> skipp025 at yahoo.com
> www.radiowrench.com
>
> > "Dennis Adams" <[EMAIL PROTECTED]> wrote:
> >
> > Greetings,
> >
> > I have a GE Mastr Pro Deskmate with the 4EP38A10 Power Supply.
The
> > question I have... are the barrier strips at the top the same
> pinouts
> > for the TX/RX strips as the 4EP38A12 power supply? I have the
> 4EP38A12
> > Schematic.
> >
> > I am wanting to hookup a controller and wanted to make sure I have
> the
> > COS, audio, PTT, etc correct for wiring.
> >
> > Better yet if someone has a schematic for this unit that would
also
> > detail the barrier strip designations, please contatct me. I will
> pay
> > for a schematic of this power supply.
> >
> > Thanks,
> > Dennis / KB8YGC
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