Glenn:
I'll be glad to work with the drawings with you or any other way I can help out.
My O6 rev 3 developed a problem some time ago and I have worked on it on and
off for a year now.
The PLL remains stuck at 5.5 mhz but the digits say we are tuning. Some time
after Sept I'll box it up
or drive up and drop it off. You're not that far away. I'm in Myrtle Beach.
Let me know how to help out. I do have some electronics background from my
work in Oak Ridge, TN
where I built quite a bit of equipment to work with our fusion energy
experiments. I just do not have the
test gear that I used to have on my test bench.
I do have a Jupiter running now so the O6 can sit idle a bit longer. I am very
interested in getting it working
again and looking at some of the things mentioned in the TenTec Wiki page.
73's Clayton N4EV
________________________________
From: Glenn <wa4aos@aol.com>
To: tentec@contesting.com
Sent: Wednesday, July 20, 2011 1:36 PM
Subject: [TenTec] Ten tec Onni 6 Logic board
Hi Group,
Based on the lack of response to my previous post regarding a possible NEW
replacement logic board for the Omni 6, I have put that project on the back
burner for now.
That would be a daunting task and not one I am willing to invest time and lots
of money into unless there is more interest at some point. So, the next best
solution is gearing up for repairs and mods to the existing
logic boards since Ten Tec is now sending some home as unrepairable. If this is
ever going to happen, now is the time to do so.
My only reason for looking into this is my affection for the Omni 6 series
radios. I am not enamored with DSP IF derived configurations yet, and
personally have great respect for the performance of the O6. The O6 with the
INRAD roofing filter is awesome.
Part 1: I looking for Omni 6 version 1, 2 , 3 or 6+ as well as Paragon's and
Paragon II's that are either lightning damaged, or otherwise unrepairable.
Cosmetic condition is not too important; just not any that really were used as
boat anchors or shotgun target practice..
These will be used for test beds to repair logic, AF/IFboards and PA's and free
up my personal equipment. Also looking for units to be parts queens.
Let me know what you have and a REASONABLE price. Donations going toward Logic
board support are always appreciated.
Part 2: I have found a source for the DSP and RTC Ic's on the Omni 6 Logic
board. and have ordered a large quantity of these as well as the rest of the
IC's on the Omni 6+ logic board.
Is there interest in an IC kit for the Omni 6+?
I can tell you most of the IC's are soldered in and unless you have experience
and equipment, replacing the IC's is not recommended.
Of course, there is no reason to replace any of the IC's if your board is
working properly. This is not like shotgunning all of the tubes in an old
Hallicrafters receiver. Hi Hi
My point in offering a kit of spare IC's is the risk of not being able to find
them later. I was VERY LUCKY to find some of the parts I did find.
I have one O6+ and one Paragon logic board that I have installed gold plated,
machined sockets for each IC on the board to use as a test board to QC
inventory and possibly to verify questionable parts for a board being repaired.
Part 3: The schematic in my Omni 6+ manuals and the one online at the Ten Tec
site has a number of errors. Does anyone have a correct Omni 6 or plus manual
that is correct? Check the wiring of U15 and U16 or locate U23 in the parts
list or buzz out the location of the crystal used for the RTC, that's for
starts. Try to follow the address or data lines around the board????? I think
they were trying to confuse the communist, sure worked on me.. Hi Hi
I have started the task of rewritting the schematic. Is anyone willing to do
some of the work? If there is a real desire to keep these running well into he
future we need parts and accurate docs. I have also made large clear color pics
mapping the location of all IC's, connectors and transistors. This is a set of
3 pics, one for each component type. I have over 18 hours doing this alone. I
have also made and excel spread sheet listing all of the IC's,correctly, their
descriptions and board locations as well as my source, as of now for the
vendors who have these. Next is mapping out all of the electrolytic cap's which
will soon be very dated.
I am documenting bus data and saving files with my logic analyzer as I
stimulate functions from the front panel as well as logging pulse states with
my digital O scope to use as a comparison for testing boards with problems. So
far, I have identified about 85 significant logic states to aid in
troubleshooting. This was a major time saver on one of the Omni 6 boards that I
recently repaired after Ten Tec had declined to effect the repair for a guy in
TX.
Any suggestions or assistance will be appreciated.
Regards,
Glenn WA4AOS
DSM Labs
Laurens, SC
w w w dot d s m l a b s dot c o m
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