It should have mode inputs as well as a CAT port and the logic to set the
freqs of both VFOs from the CAT port
Barry N1EU
On Fri, Nov 25, 2016 at 7:28 AM, Steve Ellington <steven4lq@gmail.com>
wrote:
> For sure this would be a great product.
> It would also need inputs for the T-R voltage and a couple of offset
> voltages as are used to correct the readout in the Corsair.
>
> I've had Corairs readout failure and one was so unfixable that I ended up
> installing a new frequency counter with a beautiful LED readout I found on
> on Ebay from China. However it lacked these offsets and a cheat sheet had
> to be created for mentally calculating the offsets. I suppose this could be
> easily handled with the outboard processor we're talking about.
>
> Steve N4LQ
>
> On Thu, Nov 24, 2016 at 10:27 PM, Ron Notarius W3WN <wn3vaw@verizon.net>
> wrote:
>
> > As prevalent as 5 MHz and 9 MHz based VFO/PTO circuits have been over the
> > years in so many different analog transmitters and transceivers, I'm
> > surprised that no one has done just this -- marketed a DDS VFO in an
> > external enclosure. You'd think it'd be relatively simple enough to do.
> >
> > Just think -- a simple, relatively inexpensive device that would greatly
> > improve any of these old rigs, without requiring any significant (or even
> > any) modifications or adjustments.
> >
> > 73, ron w3wn
> >
> > -----Original Message-----
> > From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Al
> > Gulseth
> > Sent: Thursday, November 24, 2016 9:06 PM
> > To: gerd Groos; Discussion of Ten-Tec Equipment
> > Subject: [TenTec] "Semi-CAT" for analog* TT rigs (was Re: Corsair II
> > PCInterface)
> >
> > Since we're doing some "what-if" here:
> >
> > Instead of a frequency counter, how about using a DDS VFO in an
> _external_
> > enclosure - set up along the lines of the 301/302 remote tuning knob ?
> The
> > VFO jumper on the back panel provides a very convenient input point for
> the
> > DDS signal. If implemented properly, in conjunction with the band data
> > outputs the DDS VFO could output rig frequency to the control program as
> > well as possibly allowing computer controlled tuning within the selected
> > band. If the mode switch was also tied into the system as Gerd suggested,
> > "semi-CAT"
> > operation would seem to be possible with minimum modifications to the
> rig.
> > Returning the rig to its normal operational state would simply require
> > unplugging a couple of data connectors (along with an RCA cable to the
> > accessory 12V output on the back of the rig if powering the DDS VFO that
> > way) and switching back to the VFO jumper on the back panel.
> >
> > As stated previously, this one's "above my pay grade" so I'll let someone
> > else run with this if it's deemed to be a viable possibility.
> >
> > * "analog" here refers to early Omnis, Corsairs, etc. with remote VFO
> > input.
> >
> > 73, Al
> >
> > On Thu November 24 2016 3:09:51 pm gerd Groos wrote:
> > > *> For a "black box", as cheap as RasPI's are that might be an option
> > > to
> > > consider*
> > >
> > > Raspberry will be fine.
> > >
> > > Hardware:
> > > - Use Raspberry
> > > - Add dd frequency counter interface, along idea here
> > > http://www.swharden.com/wp/2016-10-10-raspberry-pi-rf-frequency-counte
> > > r/
> > > - Add bad data lines, plus SSB/CW mode line interface
> > > - Add shielding / EMI measures as required
> > >
> > > Software:
> > > CAT command implementation can be based based on hamlib or Juma TRX-2
> > > firmware (source code available for the Jumma TRX, see firmware on
> > > their
> > > website)
> > >
> > > Link from Corsair to PC could be by WLAN
> > >
> > > 73
> > >
> > > Gerd.
> > >
> > > 2016-11-24 20:19 GMT+01:00 Al Gulseth <wb5jnc@centurytel.net>:
> > > > I didn't look at the C II but the Omni B/C and Corsair 560 all
> > > > appear to have a dedicated (isolated) bandswitch wafer tied to the
> > > > "linear" socket on the back panel. If' I'm reading the schematics
> > > > right the individual bandswitch positions and the common terminal
> > > > all come out to the connector, so the voltage/logic level used could
> > > > be anything reasonable within the switch rating. The only reason I
> > > > could see needing diodes would be to encode it down to a binary
> > > > sequence instead of dealing with 9 individual lines.
> > > >
> > > > That being said, the C II may be different.
> > > >
> > > > For a "black box", as cheap as RasPI's are that might be an option
> > > > to consider (speaking out of school here as I'm not up to speed on
> > > > them.)
> > > >
> > > > 73, Al
> > > >
> > > > On Thu November 24 2016 9:01:45 am Steve Ellington wrote:
> > > > > Corsair II and older TTs.
> > > > >
> > > > > The band information (+13.8v) is easily available from the
> > > > > bandswitch
> > > >
> > > > with
> > > >
> > > > > just the addition of a few diodes on SW4 or SW5.
> > > > >
> > > > > The frequency information is available via the VFO jack.
> > > > >
> > > > > A black box is needed to convert this info to interface via a USB
> > > > > port to the pc and emulate some rig. That's beyond my pay scale.
> > > > >
> > > > > Is there anyone out there willing to tackle such a project?
> > > > >
> > > > >
> > > > > Steve N4LQ
> > > > > _______________________________________________
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