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@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@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@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
>>
>> _______________________________________________
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>>
>
>
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