[Top] [All Lists]

[TenTec] Omni VI+ Zipper Noise

To: <tentec@contesting.com>
Subject: [TenTec] Omni VI+ Zipper Noise
From: RMcGraw@InfoAve.Net (Bob & Linda McGraw K4TAX)
Date: Wed, 15 Aug 2001 22:27:30 -0700
To those that have asked, I'll let the cat out of the bag and hope that
Paul at Tentec won't wring my neck the next time I see him.  Sorry to
brag Paul, but you guys do great work and go to great lenghts to make
for happy customers.  THANKS!

Now to business at hand.  I raised concern regarding zipper noise and
birdies, especially on 15M, 12M and 10M.  Detailing such in writing, as
to frequency mode and etc., I sent the radio back to Tentec.  They were
very gratious in addressing my concerns.

Here's the repair report:
The following work was done in an effort to reduce birdies.  Added 6
snap on EIM Ferrite chokes to control lines on logic board.  Added
bypassing and grounds to 9 MHz xtal filter board.  Replaced U-1 on 9 MHz
xtal filter board.  Replaced diode mixer D-31 on bandpass filter board
and added top side grounds.  Relocated cables and added grounds to xtal
osc L.O. board. 
End Quote:

They also did some other work to correct faults after a near by
lightening strike caused some other problems.

Overall, I find that the work done did improve, to my satisfaction, the
zipper noise and birdies.  Now I didn't say that they were all
eliminated, but these changes made a big difference.  BTW, the radio is
used largely as the 10 meter IF for the 144 MHz and 432 MHz transverters
which are part of my EME system.  I make it my business to listen for
weak signals.  Birdies or otherwise.  As the IF in my application, the
Omni VI+ hears signals that other radios won't hear under the same
conditions.  I've tried them.....I know.  


<Prev in Thread] Current Thread [Next in Thread>
  • [TenTec] Omni VI+ Zipper Noise, Bob & Linda McGraw K4TAX <=