[TenTec] Omni VI mystery

Mon Apr 28 17:58:58 EDT 2014

He's getting no CW offset at all.  I think something in the switching 
circuit to bring the CW trimmer into play is not working.

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

On 4/28/2014 5:24 PM, Clayton Brantley via TenTec wrote:
> Look at section 4-14 for the Tx audio board.  You will need a very accurate freq counter and a lot
> of patience  to adjust the BFO freqs.  They need to be adjusted a few times to make sure they are
> right on.  You might want to call TenTec and talk with Gary also.  He's a great help.
>
> Clayton N4EV
>
>
> On Monday, April 28, 2014 4:18 PM, Barry N1EU<barry.n1eu at gmail.com>  wrote:
>
> Jim, you need to first align your BFO oscillators (where have I heard this
> before?).  You need a frequency counter or a well aligned general coverage
> receiver with accurate readout that can tune to 9MHz.  The procedure is
> described on pages 4-43 and 4-44 of the Omni 6 manual.
>
> 73, Barry N1EU
>
>
> On Mon, Apr 28, 2014 at 7:39 PM, Jim Allen<jim.allen at longhornband.net>wrote:
>
>> OTA testing with W5DV just now has demonstrated that something is goofed up
>> in the frequency alignment.  When he transmits at 14.050.00, I must tune
>> 14,050.70 to hear him with a 700 hz. tone.  On transceive, when I go back
>> to him, he hears nothing, as my transmit frequency is zerobeat on
>> 14,050.00.   When I call him on 14,050.00 he hears me, but I don't hear
>> him, because I am zero beat with his signal.  I dialed in -.70 of XIT and
>> we hear each other as expected.  I copy him on 14,050.70 and he copies me
>> sending on 14,050.00.  That's not how this is supposed to work.
>>
>> I also notice that adjusting the sidetone frequency doesn't appear to
>> change the transmit frequency. It does change the difference between the
>> received frequency where the beat note is zero'd with the sidetone, which
>> amounts to the same thing, I guess.
>>
>> I also checked out both VFO A and B and they are the same.
>>
>> This radio was at TenTec in March and thoroughly checked out.
>>
>> Is this frequency alignment easy, or require special test equipment, etc?
>>
>> 73 de W6OGC  Jim Allen
>>
>>
>> On Mon, Apr 28, 2014 at 1:41 PM, Jim Allen<jim.allen at longhornband.net
>>> wrote:
>>
>>> I spoke to Paul at Tentec this morning.  He suggested I use the 706 to
>>> transmit and see if I hear that signal in the Omni.  So, with the 706
>> tuned
>>> to 14,050.00, on low power and dummy load, I copy with 706 on the Omni at
>>> 14,050.70 with a 700 hz. tone.  It is zero beat at 14,050.00.
>>>
>>> The 706 has a transmit freq, function which shows it transmitting on
>>> 14,050.00.  If I was at another location and transmitting at 14,050.00
>> with
>>> the 706, and you heard me using this Omni, your VFO would show 14,050.70.
>>> When you with the Omni, call me, on transceive, the signal is 14,050.00
>> and
>>> zero beat, so I don't hear it on the 706.
>>>
>>> Paul also confirmed that the sidetone setting varies the transmitter
>>> offset, hz for hz, so that when you zero the other signal to the same
>> tone,
>>> the transmitter is zero'd with the other signal.
>>>
>>> Paul could do no more without the radio on the bench but suggested I
>>> eventually may want to do a Master Reset.  I did a partial reset last
>>> night, with no discernible change.
>>>
>>> I'll get on the air later with other stations locally to do some more
>>> testing.
>>>
>>> 73 de W6OGC  Jim Allen
>>>
>>>
>>> On Mon, Apr 28, 2014 at 12:35 PM,<chacuff at cableone.net>  wrote:
>>>
>>>> If that just came back from the factory I would ship it back up to
>>>> them...sounds like a simple alignment issue but it should have been
>> caught
>>>> in final checkout before being shipped.
>>>>
>>>>
>>>>
>>>> Without some test gear it will be hard to get it right.
>>>>
>>>>
>>>>
>>>> Cecil
>>>>
>>>> K5DL
>>>>
>>>>
>>>> From: John Swartz
>>>> Sent: April 27, 2014 5:05 PM
>>>>
>>>> To: tentec at contesting.com
>>>> Subject: [TenTec] Omni VI mystery
>>>>
>>>>
>>>> I ran an on-air test with Jim and found that when using my Omni VI+,
>>>> transmitting on 14.052.50, Jim was receiving me at 14.053.11 on his Omni
>>>> 6.  When he transmits, I receive him just fine if I engage the RIT and
>>>> listen up 500 Hz, which just about coincides with what his rig is
>>>> telling him his transmit frequency is.  So, it seems that when he hears
>>>> a CQ and answers it, he is actually about 500 Hz higher in frequency
>>>> than the guy he is hearing.
>>>> I hope this helps diagnose his problem.  I'm not savvy enough to know
>>>> the fix, other than temporarily engage the RIT or XIT and preset that
>>>> 500 Hz difference.
>>>>
>>>> 73,  John WA9AQN
>>>>
>>>> --
>>>> John Swartz
>>>> Amateur Radio WA9AQN
>>>> 15076 New Salem Bluff Road
>>>> Petersburg, IL 62675
>>>> USA
>>>> tel 217-632-5925
>>>>
>>>> _______________________________________________
>>>> TenTec mailing list
>>>> TenTec at contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/tentec
>
>>>> _______________________________________________
>>>> TenTec mailing list
>>>> TenTec at contesting.com
>>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>>
>>>
>>>
>> _______________________________________________
>> TenTec mailing list
>> TenTec at contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>