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Re: [TenTec] Omni 6 Opt.3 Problem

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Omni 6 Opt.3 Problem
From: "Phil Chambley, Sr." <k4dpk@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 9 Feb 2012 21:29:59 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Flaky C-31 is a very common occurrence.  You might try some contact cleaner 
down inside it and rotate it back and forth to scrub it.  If that doesn't 
make it smooth, it needs changing.

Very important:  Make certain you put all the mass term connectors back 
exactly where there were.  The ones along the front edge of the logic board 
and the ones on the left-central interior of the board, in particular.

Its not a difficult job if you're careful about this.

Phil C. Sr.
----- Original Message ----- 
From: "Barry N1EU" <barry.n1eu@gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, February 09, 2012 6:47 PM
Subject: Re: [TenTec] Omni 6 Opt.3 Problem

> Just wanted to add one more comment.  The Omni 6 is anywhere from 16-20
> years old depending on vintage.  I would guesstimate that there's a 50%
> chance that C31 is NOT going to adjust very well.  Before messing with it,
> you need to be prepared to replace it if the adjustment doesn't go well.
> If you're not prepared to do that, you probably don't want to touch it 
> Barry N1EU
> On Thu, Feb 9, 2012 at 11:41 PM, Barry N1EU <barry.n1eu@gmail.com> wrote:
>> If you're not comfortable doing board level work, send it to Ten-Tec for
>> repair.
>> I recently replaced C31 in my Omni 6.  The cap replacement was easy.
>> Getting everything calibrated and the PLL happy was tricky.
>> BTW, you need to make sure your BFO oscillators are aligned before doing
>> WWV calibration.  If the Wiki doesn't say that, I'll add a note.
>> Barry N1EU
>> On Thu, Feb 9, 2012 at 11:24 PM, Gary Winkelman <n2um@live.com> wrote:
>>> I have an Omni 6 Opt 3 , it's a great radio.  I'm basically a CW and 
>>> RTTY
>>>  operator, I haven't made a SSB contact in years.  I do enjoy the DX
>>> packet
>>> cluster and controlling my radio with Logger32 and N1MM.  I found that
>>> when
>>> I moved to a cluster spot, I was somewhat off frequency, about 50 Hz.  I
>>> know that's not much but I'm rather anal about stuff like that.  I 
>>> realize
>>> that the spotters radio might not be correct but it should be close.  I
>>> decided to do the WWV calibration as described in the Wiki.  My radio 
>>> does
>>> not have a TXCO oven so my adjustment was at C31 on the Logic board. I
>>> expected to have to move it a tiny bit but what I found is that C31 was
>>> not
>>> smooth or linear at all and the frequency readout jumped around and even
>>> small movements would unlock the PLL and the radio would go silent.
>>>  Turning the power off and on again would bring it back but then I would
>>> have all kinds of strange stuff on the readout like 41 MHz or 2-E2.1... 
>>> I
>>> did a master reset and it went back to normal.  It is not on frequency 
>>> (30
>>> to100 Hz off) and the PLL randomly drops out after being on for a while.
>>> I only have a multi meter and I'm certainly not qualified or comfortable
>>> doing board level work or calibration.  I know I should have left well
>>> alone but that's water over the dam now.  Could C31 be faulty and 
>>> causing
>>> the problem or did I do more damage?
>>> Any suggestions?
>>> Gary  N2UM
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
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