Yup, that's all I'd do for an inverter.
I have two repeaters using CAT200Bs and have had no problem with the audio. I
never measured it to see how flat it was. It's not broadcast quality; it's not
supposed to be.
hdcom sells coax connectors, cables, etc. They're located on Lawn Guy Land.
Bob M.
======
--- On Thu, 9/11/08, kk2ed <[EMAIL PROTECTED]> wrote:
> From: kk2ed <[EMAIL PROTECTED]>
> Subject: [Repeater-Builder] Re: Comspec TS32P encoder control
> To: Repeater-Builder@yahoogroups.com
> Date: Thursday, September 11, 2008, 6:23 PM
> Thanks, Bob.
>
> The NPN was my plan if no one had any better suggestion.
> All I'll
> need to do is tie the CAT's logic pin to a 10K pullup
> and 2n2222,
> then tie the collector to the TS32P's op amp input, and
> the emitter
> to ground.
>
> At least the CAT will enable the encoder based on rx
> activity of
> either RX1 or RX2 9 (when linked), and only if the rx's
> are actually
> active.
>
> For example, if the receive mode is COS&PL rather than
> COS only, and
> the encoder was tied directly to COS, then the encoder
> would thump on
> and off any time the rx squelch popped from noise while the
> tx is
> active, which could be an issue for some instances like a
> hub
> repeater. Better to let the controller handle it WHEN
> possible.
>
> I also don't care for the audio quality thru the CAT
> controllers.
> Somewhat restricted curve as compared to the others. I
> would never
> use a CAT on my own repeaters, but this is for someone
> else, so I'm
> using what they had on hand.
>
> This is a prime case of "you get what you pay
> for", and where the
> extra money spent for an SCOM or Link is money well spent.
>
>
> Eric
> KE2D
>
>
>
>
> --- In Repeater-Builder@yahoogroups.com, "Bob M."
> <[EMAIL PROTECTED]>
> wrote:
> >
> > Add a simple NPN transistor (and two resistor)
> inverter between the
> CAT and the TS32. Don't fight it, just put on your Borg
> hat and adapt.
> >
> > Of course you know that the CAT only enables its
> transmit PL when
> there's a valid COR signal on the input. You won't
> get PL activated
> on CW ID, courtesy beep, or anything else. For all that,
> you might as
> well just wire your receiver COR to the TS32 and bypass the
> CAT
> controller.
> >
> > Bob M.
> > ======
> > --- On Thu, 9/11/08, kk2ed <[EMAIL PROTECTED]> wrote:
> >
> > > From: kk2ed <[EMAIL PROTECTED]>
> > > Subject: [Repeater-Builder] Comspec TS32P encoder
> control
> > > To: Repeater-Builder@yahoogroups.com
> > > Date: Thursday, September 11, 2008, 12:58 PM
> > > Has anyone controlled the encode function of a
> TS32P via a
> > > CAT
> > > controller's encode logic pin?
> > >
> > > I've wired several SCOM 7330s and Arcom
> RC210s to
> > > factory encoders in
> > > MS2000s, Micors, and even outboard TS32 encoders.
> The Scom
> > > and Arcom
> > > controllers can be configured to set their encode
> logic for
> > > either
> > > active high or active low (active high needed for
> the
> > > aforementioned
> > > units); however my latest project utilizes a
> CAT200
> > > controller, which
> > > only supports active low.
> > >
> > > In the past I've used the logic pin to ground
> the input
> > > of the op-amp
> > > stage on the TS32's encoder, effectively
> shutting off
> > > the encoder.
> > > However, since the CAT controller is active low,
> that
> > > won't work, as
> > > the logic needs to be active high for the
> op-amp's
> > > input to pass.
> > >
> > > I don't prefer to use a relay or audio gate
> switch on
> > > the TS32's
> > > output because the impedance load of the encoder
> affects
> > > the overall
> > > exciter deviation. If anyone has played with
> Micors or
> > > MSRs, you
> > > know that adding or removing the encoder output
> from the
> > > exciter
> > > changes the load on the modulator stage,
> resulting in
> > > varying repeat
> > > audio deviation levels depending on the state of
> the
> > > encoder
> > > connection (even with zero tone level, ex: reed
> pulled).
> > > Hence the
> > > reason the factory boards control the encoder
> BEFORE the
> > > final tone
> > > output. The final impedance load of the encoder
> is still
> > > present at
> > > all times, with or without encode tone present.
> > >
> > > I also can't just switch the ground of the
> TS32 board,
> > > as it is being
> > > used as a full time decoder as well.
> > >
> > > Before I add some inverting logic between the CAT
> > > controller and the
> > > TS32, does anyone else have any ideas?
> > >
> > > Eric
> > > KE2D
