[TenTec] OMNI C Mixer or PTO problem

[Joe]

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 at coe.neu.edu>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Cc: "Michael Silevitch" <msilevitch at 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 at 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 at coe.neu.edu>
>>To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>>Cc: "Michael Silevitch" <msilevitch at 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 at 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 at coe.neu.edu>
>>>>To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>>>>Cc: "Michael Silevitch" <msilevitch at 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 at 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 at coe.neu.edu>
>>>>>>To: <tentec at contesting.com>
>>>>>>Cc: "Michael Silevitch" <msilevitch at 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
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> TenTec mailing list
>>>>>>> TenTec at contesting.com
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>>>>>>
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>>>>>
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