[TenTec] can't service the omni-VI mixer

Fri Nov 7 10:08:03 EST 2014

When I wrote my original e mail about ten tec being unable to repair the noisy mixer board on my OMNI-VI, I think the point of the e mail was lost. I do not have the bench or the test gear any longer to trouble shoot the board. My question is: If I was able to find a working normally mixer board,lets say pull from a parts rig,could I sub that board into my OMNI VI and not require any additional work ,such as realignment etc and have the board work like it should. Tem tec made no comment on what pat or parts that could no longer get. I will call then and ask for details on which parts it was. 
     Using Wade's list it sure looks like all the parts could be gotten somewhere,but as I said I don't have a good enough bench to be able to trouble shoot the board to find out what the noise source is and correct it. Is there anyone out there that could repair the mixer board ,other then ten tec. Sure hate to dump a beautiful rig like the OMNI-VI for a 5.00 part. 
73
dale wt4t

-----Original Message-----
From: "Wade Staggs" <tvman1954 at gmail.com>
Sent: Thursday, November 6, 2014 11:52pm
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Subject: Re: [TenTec] can't service the omni-VI mixer

*Hello Ralph,*
*                          You couldn't have said that any better as far as
I am concerned. I love my Ten Tec Radios and really enjoy operating them.
Today I replaced two Relays in the Low Pass Filter Board of a Friends
Jupiter. The layout is simple. There is plenty of room inside to work on
them and the Glass Epoxy Circuit Boards are the Highest Quality. The Relays
from Ten Tec, cost a whopping $3.00 each. Gary, at Ten Tec advised that we
replace all 14 relays but we convinced him that this operator never leaves
75/80 Meters hi .. hi .. Well, we can't guess at the cost of these relays
if they had been for an KenYaeCom Rig but, can promise they would have cost
More than $3.00 each..... Ten Tec Factory Service and the Ten Tec Receivers
are Legendary and we have never heard a Ten Tec that sounded Bad On the
Air. I became hooked on Ten Tec when we got the Paragon 585 .... And today
we fell in love with the Jupiter all over again. We are hoping for an Eagle
soon and an Omni 7 would make a lot of dreams come true. *

*                                                                  73 to
All from Wade/KJ4WS*

On Thu, Nov 6, 2014 at 7:48 PM, Ralph Arnold <rea.papaof10 at gmail.com> wrote:

> That sounds like some excelent advice.  I'm an old NAVY trained Aviation
> Electronics Tech Radio Communications  been repairing radios for almost 50
> yrs   I've had a lot of radios over the years  That I managed to keep
> working   A couple years ago I stopped at the TenTec factory an was really
> impressed with their line of radios.  They are made like a Mercedes simple
> ,reliable, good engineering, and most of all repairable.  I have several
> older TT radios  that enjoy in  my retirement.  Feels good knowing that I
> got a shot at fixing them RS parts. HiHi  Enough of my rambling just had to
> throw in my 2 cents worth.  73 KD8BTQ  rALPH
>
> On Thu, Nov 6, 2014 at 5:23 PM, Stuart Rohre <rohre at arlut.utexas.edu>
> wrote:
>
> > NTE and other cross reference general replacement semiconductor companies
> > should have crosses to the MPS devices.  Don't overlook Mouser,
> > distributor.  They have vast stocks and fast service at reasonable
> prices.
> > There are still surplus electronics places like Electronic Goldmine that
> > often have out of production items.
> >
> > Substituting bipolar transistors really comes down to getting the right
> > polarity, NPN or PNP and other major parameters.  A current rating and
> > voltage rating close to the original, and frequency cutoff similar to the
> > original, or higher than the application you are replacing.  Get the Beta
> > as close as you can, but remember, there are wide ranges of beta that can
> > do the job.  The mixer may not be a high gain stage, due to its intended
> > function.  Most cases of abnormal noise would not be in the active
> devices,
> > (transistors) but in connections, or in faulty passive components,
> > resistors, capacitors, and other such components.
> > A rebuilt mixer board that is close to the original, is better than a non
> > working mixer in a radio just sitting on a shelf.
> >
> > Don't overlook loose plug in connections from the board to the
> > motherboard.  Sometimes connectors may wear to cause intermittent noise.
> >
> > The wiggle test helps here.  If wiggling something causes a noise, look
> > closely at what moved.  Don't be too agressive, but the more experience
> you
> > get with troubleshooting, the better your "touch" will be at finding
> > causes of small problems.
> >
> > -Stuart
> > K5KVH
> >
> > _______________________________________________
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> > TenTec at contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
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