[TenTec] Omni VI NB Mod

[John]

Gee atr I am impressed I did not know you were so technical     John
----- Original Message ----- 
From: "Arthur Trampler" <atrampler at att.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Tuesday, March 04, 2008 11:04 AM
Subject: [TenTec] Omni VI NB Mod


Hey All,

Over the weekend I replaced the two, 22K resistors on the NB board with 16K 
as recommended by some to be able to turn off the NB on my Option 3.  I was 
suffering from the "klix" effect, where it seemed so many stations I 
listened to, if they were at S9 + 10 or better, had bad klix.

I now have what sound like IMD artificats coming "out the wazoo."  There 
seems to be some abatement, at times, if I actually increase the N.B. level 
a bit.

Received CW signals are distorted and I am often picking hearing what sound 
like IMD-generated signals, even with no strong signals on the band. 
Kicking on the 9mhz filters (which turns on the roofing filter) does kill 
these.

Has anybody else had an experience like this?

I was brain-dead and did not take a picture of the board before taking it 
out, figuring I would have labels on the various connectors to put them back 
in.  I noticed one difference in my board compared to the picture in the 
manual.  In the upper right there are two jacks to receive an RF connector. 
I'm thinking one was labeled perhaps 34.  In the manual, there is only one 
jack.  I used the jack shown in the manual--could this be the problem?  I 
also did not see the single RF connector that runs toward the front of the 
transceiver labeled, but assumed it was to go in the jack on the left side 
of the board.  If someone thinks I goofed there, let me know.

Finally, I could not find 1/8 watt resistors that were 16K, so I used 5%, 
1/2 watt.  Could the larger size/fact that they are not flush on the board 
be playing into this?  I tightened the board down pretty strongly, so I 
don't think that's the problem.

Any direction is appreciated.

Thanks!
Art, KØRO

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