[TenTec] Omni C tx board 80714

Shawn Upton kb1ckt at yahoo.com
Sat Sep 9 10:22:17 EDT 2017

I misspoke--it's module 80713, not 80714.  Which I don't have anyhow.  But I should point out my error in the subject line.
While at HRO yesterday I was trying to convince myself to get the Omni D that was there, for no good reason other than to save the poor thing.  And maybe have a parts rig.  This morning I decided to look at the manual:http://www.tentec.com/wp-content/uploads/2016/05/Omni_A_-_D_Owner_Manual1534.pdf
and what do you know, it shows the module I have!  It's module 80453, clearly showing the two trims and one slug.  Instructions found, so I can move forward now.
I don't know what happened here, it may be a used rig but I don't think the PO swapped modules.  Plus, the manual shows pictures of two different things, so I think it is factory installed.  I'm just happy to find the directions required. shawn kb1ckt 

    On Tuesday, September 5, 2017 8:50 AM, Barry N1EU <barry.n1eu at gmail.com> wrote:

 For carrier null, you also need to adjust R11 on the 80449 SSB Generator
board (step 12 on p3-41), as well as R14 on 80713 TX Mixer board (p3-43).

It would be prudent to first adjust the carrier oscillators (p3-40 and
p3-41).  If the carrier oscillators are not accurately aligned, carrier
null will be impaired further.

I suspect it's very possible that there was a change to the board that
would explain what you're seeing.

73, Barry N1EU

On Tue, Sep 5, 2017 at 8:04 AM, Shawn Upton via TenTec <
tentec at contesting.com> wrote:

> Picked up a desk mic, but while listening on a separate receiver I noticed
> a fair amount of carrier. At first I thought 60Hz pickup, but I have it
> with out any mic wire connected (just a connector with ptt tied to gnd). So
> I went to adjust the carrier balance, but am confused. The manual has a pic
> showing the tx board relative to all boards; it looks like what I have. Two
> trims and a large shielded inductor. And no ic. But the page for the 80713
> shows a 1496(? off memory right now) ic and only one trimpot. Which is not
> what I have.
> It looks like a running change, from a discrete design to an ic based one?
> Regardless, how do I adjust?
> shawn uptonkb1ckt
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