[TenTec] OMNI-VI Birdies

[Warren J. Walsh]

In going back through the recent list archives, I came across several 
emails concerning OMNI Noise.  I did some private corresponding with Piotr, 
who graciously provided me with additional information on the mods he did 
to the Logic Control board.  This past weekend I removed the Logic Control 
board from my OMNI-VI+ and looked it over.  What a surprise, being a 
digital designer, I was very concerned by the quality of this board.  I 
cannot believe there were so few de-coupling capacitors on the digital 
section of this board, and the size of the power/ground traces is 
appalling.  I also cannot believe it would have increased the cost that 
much to have had a power and ground plane.  I did find that there is 
approximately a 5 Ohm resistance between VCC pin 26 and VCC pin 57 of the 
DSP chip, this is NOT good.  I soldered a jumper between these two pins.  I 
would suggest that anyone who has an OMNI-VI check this out.

73
Warren Walsh - K2BM


==================================================================
Warren J. Walsh (warrenw@pentek.com) Pentek, Inc.
Design Engineer                      One Park Way
Phone: (201) 818-5900 x 251          Upper Saddle River, NJ 07458
Fax:   (201) 818-5941                http://www.pentek.com/
==================================================================


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