Ken
thanks for the info,main problem is all my test gear is about as old as I am.
None of it tight enough for a a adjustment this fine. Can live with it for
now,when tentec gets settled in the new place ,will likely send it down.
Wouldn't want to count on my old stuff.
thanks
73
dale wt4t
-----Original Message-----
From: "Ken Brown" <ken.d.brown@hawaiiantel.net>
Sent: Sunday, October 19, 2014 12:27pm
To: tentec@contesting.com
Subject: Re: [TenTec] OMNI-VI question
Whether you can fix it yourself depends on your access to accurate
instruments and your skill at using them.
The frequency accuracy of the Omni VI depends on the accuracy of the
reference oscillator which determines the accuracy of the VFO PLL AND
the BFO accuracy. The BFO in the Omni VI IS NOT LOCKED TO THE 10 MHz
reference oscillator. The BFO has several adjustments for the different
frequencies used for USB, LSB, CW and FSK. Those adjustment interact, so
it is necessary to do them in the correct order, and them do them again.
You will need a way to accurately measure and adjust the 10 MHz
reference and the BFO frequencies. A frequency counter with a known
accurate reference would be the easiest way to go.
You mention having a signal generator. If that has an accurate reference
you could use it and a general coverage receiver to listen to the beat
between your sig gen and whichever oscillator you are adjusting. You
will have to play around with methods of getting a sample of the
oscillator and your signal generator at the right amplitudes to hear the
beat nicely on the receiver.
DE N6KB
On 10/19/2014 7:02 AM, wt4t@reagan.com wrote:
> Have a beautiful OMNI-VI,new to me. I noticed the frequency readout is off
> about
> .68 on the readout. checked with my Sig gen and then with a zero beat on WWV.
> Went Thur the manual,nothing about this problem. Is this something that TEN
> TEC needs to fix or can I do this my self? I realize no big deal,but would
> like to have things as they should be. be grateful for any help on this.
> 73
> dale wt4t
>
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