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Re: [TenTec] Under the Dirt...a Diamond!

To: geraldj@weather.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Under the Dirt...a Diamond!
From: Bwana Bob <wb2vuf@verizon.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Wed, 26 Jan 2011 19:15:20 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Congratulations on a good deal!  I thought at first that you were going 
to say that it was your original Omni, but your story is heartwarming 
enough.  It's a good thing to bring an old rig back to life with some 
TLC.  I do see rigs at hamfests that have been badly abused, like 
they've been stored for years in a shed or on the garage floor.  I've 
always treated my gear like the precision instruments that they are.

The PTOs are probably OK, but they will need to be disassembled and 
re-greased.  The official Ten-Tec grease is green.  They call it open 
gear grease. It's sticky and it stays put on the gears.  Do not use a 
light grease or the spring tension on the shaft will make the PTO knob 
turn by itself!  Likewise, whatever solvent you use make sure that it is 
safe for plastics and clean it all out before you re lube the PTO.

The connectors are Amp "Mate 'n Lock". They are available from Mouser 
(pins sold separately). Ten-Tec also stocks the connectors and complete 
power cables for a couple of dollars more.

Cabinet holes and gashes can be filled with JB Weld and sanded.  If the 
cabinet is the same dark gray color as the original Corsair, Rustoleum 
gray hammertone number 7214 is a very close match.

Yes, aluminum electrolytic caps do fail. Those than do can be replaced 
with better quality ones or tantalums.

Enjoy your new treasure!


                                                         Bob WB2VUF

On 1/26/2011 2:17 PM, Dr. Gerald N. Johnson wrote:
> The stuck PTOs may only be congealed grease that would respond to a
> suitable solvent for thinning. Or like a Drake TR-4 given to a friend of
> mine, have been dropped on the face bending the shaft and PTO assembly.
> I was able to make the TR-4 tune properly again. For the Tentec PTOs get
> at least the instructions for the PTO rebuild kit and go from there.
> Ideally the grease pouch from the kit would be handy but Tentec hasn't
> yet identified that as a separate item or what it really is.
> Think about and expect failed aluminum electrolytics from power supply
> to audio coupling capacitors and bypasses. The electrolyte eats away the
> insulation and they tend to go bang or poof with voltage applied. And
> when they do that violently and fill the chassis with shredded foil and
> electrolyte impregnated crepe paper is when you will really wish you had
> chosen another project or hobby. Cleaning up a few of those has had a
> big effect on my tolerance for old electrolytics.
> Tentec and Mouser sell the parts needed to put a new connector on the
> power cord, if its like my Corsair II. Its not a Molex and I have
> information on it somewhere and I know its been discussed in the past
> two or three months so is in the archives of this forum.
> 73, Jerry, K0CQ
> On 1/26/2011 1:09 PM, Al Gulseth wrote:
>> Paul,
>> Great find! If you're technically savvy at all, fix it yourself. There are
>> plenty of resources on this list who can guide you through the rough spots.
>> (Are you listening Jerry?) Maybe I'll dig into my OmniA/B (it has a few minor
>> issues but probably not anywhere near what yours has) as a "parallel"
>> project. If you were closer by I'd suggest getting together for a "tech
>> fest".
>> That brings me to another potentially "inflammatory" point - for the casual
>> non-contest non-DXCC chasers like myself, is there really a need for
>> the "latest and greatest"? I've found that I can accomplish almost all of the
>> contacts I want with the likes of the early Omni (especially B series),
>> Argosy, 560 Corsair, etc. In fact, I find that I prefer the RX audio of an
>> analog rig. Maybe it's just psychological, but most if not all of the
>> synthesized/DSP rigs seem to have a harshness or "fuzz" to the audio that the
>> analog rigs don't.
>> Just my $0.02 worth....
>> 73, Al
>> On Wed January 26 2011 12:17:36 pm PaulKB8N@aol.com wrote:
>>>>  From the time I was first I was licensed in 1960, I bought used gear.
>>> Finally, in 1980, I bought my first piece of new gear...a Ten-Tec Omni A,
>>> Series B.  This radio would be my primary rig for the next 15+ years  and
>>> would travel with me to three continents and provide me with well over 100K
>>>    QSOs without a single failure.  I parted with it in 1995, but always had 
>>> a
>>>    warm spot in my heart for that simple, reliable radio.
>>> Its amazing how the mind can observe and record things without you
>>> consciously directing it to.  At a swap meet last weekend, my eyes fell
>>> upon something on the other side of the room that I needed to see.  As I
>>> got closer, I saw a stack of beat-up-looking Ten-Tec gear.  It was  covered
>>> with a layer of dirt and grime. It took a little imagination to  realize
>>> that it was an Omni A, Series B, matching remote VFO, 252 power supply  and
>>> remote digital display.
>>> It looked as though someone had stacked stuff on top of the Omni and put a
>>> large gash on the top of the case.  The trim ring on the transceiver looked
>>>    corroded and unrecoverable.  I started to walk away, but noticed that all
>>> the lettering on the panel looked good, as best I could tell. I spit on my
>>> finger tips and rubbed some of the grime off the tuning knob.  The expected
>>>    scratches were not there suggesting that this radio may not have seen a
>>> lot of  use.  I did the same on the other knobs, and found the metal inlays
>>> to be  in very good shape.
>>> I noted that the dial cords were broken and the VFOs were both seized, but
>>> everything seemed unmolested, with the exception of the power cord, that
>>> was  crudely cut about a foot from the connector.  I made a ridiculous
>>> offer and  was countered immediately with a "Sold!".
>>> I brought it home, set everything next to the kitchen and started
>>> cleaning.  The more I cleaned, the more excited I got.  This gear was  in
>>> excellent shape.  Front panels were perfect, the cases were much better
>>> than expected, the gash could be repaired, and the trim ring cleaned up
>>> perfectly with just a light application of Soft Scrub.  Then I took off the
>>>    top
>>> cover......bonus!!!...a 217 CW filter!  (it is worth more than half of
>>> what I paid for everything!)
>>> Now I'm in the quandary of whether I should try un-seizing the VFOs and
>>> repairing the dial cords.  I'm sure there may be other issues, maybe  it
>>> would be better to send the radio back to Ten-Tec (if the still even work
>>> on these).  Any suggestions out there?  I know there is information on
>>> line on doing these repairs and I still need a power cord to do any
>>> testing.  Any comments or suggestions are appreciated.
>>> This is one of those good luck stories.  This Omni A has  serial number in
>>> the 600s, just like my  original Omni did.  I will keep you posted on my
>>> efforts to  get it back on the air!
>>> Paul, K5AF
>>> This radio is probably as nice as any 30+ year old radio you'll find
>>> Paul and  Karen Schaffenberger
>>> ___________________________________________________________________________
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