[TenTec] Omni 6+ problem inquiry

[John L Merrill]

I've had a couple of OmniVIs over the years that have done that....maybe not
as severe as you have mentioned, but I havent tried all of your
combinations.  Apparently some do and some dont. No big deal for me but
slightly annoying. I think that is a fairly common characteristic of the
OmniVIs. I've never heard of a cure.

John N1JM
----- Original Message -----
From: <bhalterman@desupernet.net>
To: <tentec@contesting.com>
Sent: Saturday, November 13, 1999 9:53 AM
Subject: [TenTec] Omni 6+ problem inquiry


>
> I have a Omni 6+ that has rather annoying problem and I wonder if others
> might have noticed it too. The problem is not affecting the operation of
> the radio, it is Just DAMN annoying..... expecially with a price tag of
> 2600 bucks.
> When tuning the radio down in frequency (Turning the knob CCW) at a rate
> of about 2  revs per second, the KHZ digit will very quickly jump to
> another digit, then back again.
> You might see the digits change say from 8, 7, 6, 7, 6, 5, 4, 3, 2, 1,
> 2, 1, 0 etc.
> What acutally is happening is that the processor is causing the PLL to
> jump up in frequency by about 1Khz or so. The amount of jump is
> dependent upon the tuning rate settings. i.e., the slower the tuning
> rate the smaller the amount of jump.
> I have found that with a 5KHZ setting, the jump is about 1khz. This
> malady is not a function of the encoder as that would cause smaller,
> minute jumps.
> Another test that will mimick the above and skitz out the CPU big time,
> is to run the PLL to the LOWEST frequency it will tune (any band), go to
> the FM mode,  then turn the knob in the CCW direction at a rate of about
> 2-3 revs per second. If your radio is ok, you will not see anything
> happen. If your radio has this problem like mine, you will see the lower
> 4 digits quickly change to other digits. If you stop quick enough, you
> will notice the display is above where it should be. In other words, it
> jumped up in frequency.
> Another test is to zero the display to 7.000.00. with the finger index
> at a particular point, turn the knob in the cw direction 6-7 turns, note
> the frequecy you end up at. Then reverse direction and move the same
> amount of turns in the CCW direction. You should end up at the same
> frequency you started at (7.000.00) or very close to it.
>
> This radio has been back for repair twice. Each time it comes back not
> fixed. TT said they can not duplicate the problem, AND that all Omni 6's
> will do the same thing with the tuning knob test.
> Has anyone else experieced this same problem and what was the fix. Also,
> I would be interested if some of you guys would do this test with your
> radios and let me know if you see the same thing.
> Thanks.
>
>
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>


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