John,
Thanks for the quick reply.
And, thanks to your detailed description, I'm up and running.
R51 was not installed on the board. It looked like he was inverting
the signal, but I could not be sure. There are no values in the
silkscreen.
The board I have is RC-1000V Rev I.
I hope this helps the next searcher.
73, Steve N4IRS
--- In [email protected], "John Martin" <[EMAIL PROTECTED]>
wrote:
>
>
> Steve,
>
> Good luck with your RC1000v, I've had good results from those over
> the years.
>
> I've got my 1000v schematic out and there is an NPN transistor 'Q9'
> between P3-7 and U1-17 (and it has the current limiting 20k R51 on
> it's base in series with P3-7-- and a pullup 20k R50 to +5 at the P3-
> 7 side).
>
> According to my parts layout, if you have the board oriented so the
> U7 regulator is closest to you, and the audio xfmr for the autopatch
> is on the right, Q9 will be in front of P3 and to the left just a bit
> (forward of, but between P3 and U11). R51 (the series current
> limiter) is just to the right of the transistor.
>
> I wish I had a scan or PDF to send you, but I'm away from such tools
> at the moment (snowbirding in AZ). Amazingly, I've got the manual
> here!
>
> According to my RC1000V rev 4.4 (August 96) manual (page 11.0), the
> controller requires a HI with the decoding of PL. It looks to me
> the logic required for your PL decoder is another change with the 'v'
> model as compared to the earlier units.
>
> I hope this helps. GOOD LUCK!
>
> 73
> John KF8KK
> [EMAIL PROTECTED]
>
>
>
> >
> > I am connecting a MCC RC-1000V (Voice Option) controller to a
> Maxtrac
> > receiver on the main receiver input.
> >
> > I have the Maxtrac programmed for a low output on PL receive.
> > I have verified this is working.
> >
> > I have the signal from the Maxtrac connected to pin 6 on the DB 25.
> > I have verified P3 pin 7 follows the PL signal.
> >
> > U1 pin 17 does not have the signal apearing on it.
> > If I pull U1 pin 17 low, and COS is true, with the controller in PL
> > receive mode the xmitter will key.
> >
> > From what I can see on the board, there is a difference between the
> > RC-1000 and the RC-1000V in this area. P3 pin 7 does not go directly
> > to U1 pin 17.
> >
> > I have checked the schematic and board layout on the Repeater
> Builder
> > site. The schematic and board layout for the RC-1000V is not listed.
> > Can someone point me in the proper direction?
> >
> > Thanks, Steve N4IRS
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