Mike,
Are you sure there is no ACCESSORIES jack on the rear panel. It is a 9-pin
Molex connector. If it is not there, then you are right, there will be no
jumper. The manual for the OMNI A clearly has this jack. I do not understand
why an upgrade would not also have it.
Joe
----- Original Message -----
From: "Michael Silevitch" <msilevitch@coe.neu.edu>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, February 20, 2012 3:36 PM
Subject: Re: [TenTec] OMNI C Mixer or PTO problem
Dear Joe
I hope you and Gary are right. I'll give Ten Tec a call on this tomorrow.
As I said to Gary there is no reference to the accessories jumper in the
Omni C manual. There are at least two references to it in the Corsair
manual.
Regards
Mike
Sent from my iPhone
On Feb 20, 2012, at 4:27 PM, "Joe" <joe@n4yg.com> wrote:
Did you see the post by Gary, AB9M. I still think there is an accessory
jack
and that a jumper is required.
----- 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: Monday, February 20, 2012 2:46 PM
Subject: Re: [TenTec] OMNI C Mixer or PTO problem
Dear Joe
I'll look into the external VFO question. I have the manuals for both
the
243 and the 263 so that should tell me something. Also I son't see that
there is a jumper needed on the accessories socket like the Corsair has.
I
could be wrong about this but that's what is seems to be.
Regards
Mike
On 2/20/12 1:35 PM, "Joe" <joe@n4yg.com> wrote:
Well Mike, I guess the next thing to do is to see if there is anything
coming out of the PTO. You could use one of the scopes that everyone
has
been talking about or an RF probe. It is looking like the PTO may have
no
output. You can check that at the VFO OUT jack on the rear. That brings
up
an interesting question. If there is no way to turn the PTO off, how do
they
handle remote VFOs?
----- 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: Monday, February 20, 2012 11:45 AM
Subject: Re: [TenTec] OMNI C Mixer or PTO problem
Dear Joe
That's unfortunately right. The OMNI PTO circuitry does not have an
Enable
line. The Corsair does.
Any other wisdom?
Regards
Mike K1PEV
****************************************
On 2/20/12 9:22 AM, "Joe" <joe@n4yg.com> wrote:
I guess I made have assumed too much Mike. I thought all the later
PTOs
had
an E terminial which allowed the PTO to be rapidly switched on and
off
when
a remote VFO is used. If the OMNI does not have an accessory jack,
then
you
can probably disregard all of what I said.
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: Monday, February 20, 2012 8:06 AM
Subject: Re: [TenTec] OMNI C Mixer or PTO problem
Dear Joe
This sounds encouraging but can you give me a bit more detail? The
OMNI
schematic doesn't indicate an E reference. The PTO block only has a
few
outputs (VFO out, VFO shift and OT). None of these are linked to the
accessories socket. Also the manual doesn't mention that a jumper is
needed on the accessories socket. The Corsair does have a jumper
installed
when not using an external VFO. What pins on the socket need to be
jumped?
Regards
Mike K1PEV
On 2/20/12 8:38 AM, "Joe" <joe@n4yg.com> wrote:
Check the E voltage at the PTO. If this voltage is not about 8
volts,
the
PTO is disabled. The E voltage is jumpered at the ACCESSORY jack on
the
rear
panel. If it is not jumpered, the PTO will not have the E (Enable)
present
will thus be disabled.
----- Original Message -----
From: "Michael Silevitch" <msilevitch@coe.neu.edu>
To: <tentec@contesting.com>
Cc: "Michael Silevitch" <msilevitch@coe.neu.edu>
Sent: Monday, February 20, 2012 7:18 AM
Subject: [TenTec] OMNI C Mixer or PTO problem
I am trying to understand a problem with my newly purchased OMNI
C.
It
was
operating fine according to the person who sold it to me (and I
believe
him!). Upon arrival it seems that the PTO has no output or there
is
a
problem mixing the PTO signal. The reason I say this is because I
am
observing displays of 9MHz, 1 MHz or 91MHz depending on the band.
There
is
no transmitter drive current. According to the manual the display
output
is
a sign that mixing with the PTO is not occurring. I assume this
also
correlates with no transmitter current. I think (hope) the problem
is
something simple that was caused by the rough and tumble of
shipping.
I
did
try things like testing the VFO out-in jumper, jiggling cables,
leaving
the
unit on overnight, etc. I do have the option of shipping the unit
back
but
I
would rather fix it if it is a simple fix.
Another question. Will the Corsair 263 VFO work on the OMNI C?
I would greatly appreciate any advice on this problem.
Regards
Mike K1PEV
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