Mike,
I do not know what the PTO looks like in the OMNI. In my Corsair II, all
connections are solder. The output goes to a feedthrough. The feedthrough
solders to a piece of RG-174 coax which goes directly to the VFO OUT jack on
the rear panel. You should not have to open up the rig in order to see if
there is output from the PTO. Just connect to the RCA jack on the rear panel
labeled VFO OUT.
Joe
----- Original Message -----
From: "Michael Silevitch" <msilevitch@coe.neu.edu>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Cc: "Michael Silevitch" <msilevitch@coe.neu.edu>
Sent: Tuesday, February 21, 2012 8:34 PM
Subject: Re: [TenTec] Omni C
Dear Joe
I'm confused at this stage. I connected the frequency counter to the RCA
phono jack which is, I believe, the PTO output. This jack is located on
the top of the VFO box in the left rear corner when looking at it from the
front. The counter doesn't display any reading. Also when I did a
continuity check between the cable that was connected to the RCA socket on
the VFO box and the VFO OUT socket at the back of the rig, I din't have
continuity.
Am I right in assuming that the RCA socket on the VFO box is the VFO
output? If not, then it would explain my confused readings. If so, then I
will sleep on it, tomorrow is another day!
Regards
Mike
On 2/21/12 12:16 PM, "Joe" <joe@n4yg.com> wrote:
That should tell you if it is the PTO, and you can proceed from there. I
will be listening and looking.
----- Original Message -----
From: "Michael B. Silevitch" <msilevitch@coe.neu.edu>
To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Cc: <msilevitch@coe.neu.edu>
Sent: Tuesday, February 21, 2012 11:13 AM
Subject: Re: [TenTec] Omni C
Dear Joe
I obtained a loan of a 80MHz frequency counter and a 100MHz scope. I'll
use
these instruments to get more info on the signals. I will be out of town
starting tomorrow so I will probably only be able to get to this after
Sunday. If need be I'll get a signal generator as well.
Regards,
Michael
-----Original Message-----
From: tentec-bounces@contesting.com
[mailto:tentec-bounces@contesting.com]
On Behalf Of Joe
Sent: Tuesday, February 21, 2012 10:51 AM
To: wa3fiy@radioadv.com; Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Omni C
Having built a VFO which does everything that the 243 does and more, I
can
tell you how that unit works with the Corsair II and other transceivers
which have the ENABLE pin on the PTO. The OMNI obviously does not have
the
ENABLE pin nor the E signal, so things are different.
The 243 works with the Corsair II as follows. The accessory jack has an
E
pin, the PTO ENABLE. When the 243 is connected to the accessory jack, it
connects and disconnects the 8 volt regulated voltage from the E line
going
back to the Corsair as desired depending on whether or not the PTO
should
be
on. For example when working split, the remote would be on during
transmit
for example and the PTO would be off and vice versa for receive. When
using
the remote for both Tx and Rx, the PTO would be simply turned off, ie,
the
E
line disonnnected from 8 volts. When receiving simultaneously, both the
PTO
and the remote are on and the two signals are added before being output
to
the Corsair and thus both frequencies can be monitored simultaneously.
This are apparently different in the OMNI C. I would guess that the 243
has
a means of switching the PTO output, which is apparently always present
at
the VFO OUT jack. By switching the PTO as well as its internal VFO
signal,
the same thing must be accomplished. I have not studied the schematic
to
see
how it is actually done, but reed relays or diode switching would seem
to
be
possible.
In order to proceed with troubleshooting this problem, we need to know
if
there is any output from the VFO. Alternatively, if a 243 is available,
it
could be hooked up to see if the receiver works.
Joe
----- Original Message -----
From: "Lee WA3FIY" <wa3fiy@radioadv.com>
To: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; "Discussion of Ten-Tec
Equipment" <tentec@contesting.com>
Sent: Tuesday, February 21, 2012 9:09 AM
Subject: Re: [TenTec] Omni C
OK. I have three drawings here regarding this VFO question, Omni A-D
download manual,
Model 243 Remote Vfo Manual (Manual states it is for the Omni series
transceivers) and
Corsair II.
All three show a Molex 9 pin accessory connector. That's common.
Common pin assignments are:
pin 1 - T voltage
pin 2 - plus regulated voltage
pin 3 - plus 13 volts
pin 4 - shift (Omni it is called REM VFO)
pin 8 - ground
Different pin assignments are:
Omni:
pin 5 - local oscillator out (for frequency counter)
pin 6 - relay common
pin 7 - relay normally open
pin 9 - relay normally closed
243 VFO:
pin 5 - local oscillator in
pin 6 - no connection
pin 7 - no connection
pin 9 - no connection
Corsair II:
pin 5 - R voltage
pin 6 - Corsair VFO enable (note indicates this pin must be jumpered to
pin 2 when remote
vfo is not being used.)
pin 7 - relay normally open
pin 9 - relay normally closed
(relay common is internally grounded in Corsair)
Hope this helps.
73,
-Lee-
WA3FIY
On 21 Feb 2012 at 14:17, Rick - DJ0IP / NJ0IP wrote:
Gary, the 243 is the wrong radio and the wrong manual.
That's for the old Triton, which was different.
It had the Octal Jack on the back and indeed pins 6, 7, and 8 were for
the VFO.
Mike has an Omni C.
It has a 9-Pin Molex accessory socket on the back and totally
different signals on it than the 243's accessory jack.
I have a hard copy manual for OMNI A and D on my desk.
I have the downloaded OMNI C on my screen.
Both are identical and Mike (Brice) already posted the signals that
are on it. There is NO JUMPER required for the VFO management.
73
Rick
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