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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