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

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] can't service the omni-VI mixer
From: Wade Staggs <tvman1954@gmail.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 6 Nov 2014 15:00:23 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
*I purchase from alltransistors.com <http://alltransistors.com> sometimes.
And as for Ebay, those sellers have a feedback rating to worry about. I
just purchased 5 adjustable 3.3 volt regulators SMT for my LCD TV. The cost
for 5 was $5.88 with Free Shipping. The other Popular Supplier wanted about
that for One .... plus Shipping and Handling and a $25.00 minimum order. My
exercise was just to show that the Parts Are Available. ..... It was Not an
Extensive Search and if the folks on my list have these parts In Stock.
Then they are surely getting them from somewhere. The Alibaba (( Chinese
Site )) has 10,000 of the U2 ... UDN2985 IC in Stock and can source/deliver
200,000 per quarter. At least that is what they claimed. I am quite sure
that a large radio company has many more sources than just my 15 minute
search. My whole point was to try and show that with a little looking
around (( and very little looking at that )) the parts Can be found. I
surely didn't want to cause a problem. *

*                                        73 again from Wade/KJ4WS*

On Thu, Nov 6, 2014 at 12:15 PM, Louis Ciotti <lciotti1@gmail.com> wrote:

> Do now know if I would trust some of the websites you listed....
> Alltransistors.com has a copyright date on it of 2005, and the site just
> "looks" old, did not pull all the sites up, but just by the names I would
> question the real availability of what they have listed.  E-Bay would not
> be a source for a company in the business of repairing, but that is just my
> opinion.
>
> Unfortunately this is going to be how things go in the future...
> semiconductor companies are only going to produce items they can sell in
> high volumes, and we are going to see more and more rigs put out of service
> because the parts have become unobtainium... and with SDR rigs most likely
> using (or will use) high pin count FPGAs with Ball-Grid footprints... what
> a nightmare we are going to be in...
>
> On Thu, Nov 6, 2014 at 12:42 PM, Wade Staggs <tvman1954@gmail.com> wrote:
>
> > *Hello All,*
> > *                     With way too much time on my hands. We decided to
> > take a look for the Mixer Board Parts. Below is what I found. Could
> someone
> > please check my work, that we are referencing the correct parts/board.
> This
> > is the Semiconductor list from the 81595 Xtal OSC - L.O. Mixer Board.*
> >
> > *.................Diodes ......................*
> > *1. D1-D8 and D35-D44  Part # 1N4148  Available from Newark.com*
> > *2. D9-D22 ..... BA482 Equivalent to NTE 555*
> > *3. D-23 ..... Available from Newark.com*
> > *4. D25 .......BAT41 Available from Arrow.com*
> > *5. D35-D44 ..... BA482 Lot of 10 from Ebay $13.10 *
> > *6. D25  ..... SVC321SPA Equivalent to NTE618*
> >
> > *...............Transistors .......................*
> > *1. Q1 ... MPS5179 ...Onlinecomponent.com for $0.90 cents each*
> > *2. q8 ... MPS3866 ... Alltransistors.com*
> > *3. Q3 Q4 ... MPS6514 realcomponents.com <http://realcomponents.com> 180
> > in
> > stock*
> > *4. Q5 ........2N5087 Digikey.com*
> > *5. Q2-Q6-Q7 ... 2N4124 Newark.com*
> > *6. Q9 ... J310 ... Equivalent to NTE 2902*
> >
> > *................... Integrated Circuits ...................*
> > *1. U1 ... MC1496 ...Ebay.com ... Lot of 10 for $12.21 Free Shipping*
> > *2. U2 ... UDN2985 Alibaba.com 10,000 In Stock. *
> >
> > *This complete Parts Search took less than 15 Minutes. If the Rig is
> > working but just has Noise? It seems that these available parts should be
> > Most Helpful. I am now just wondering what parts the factory can't get?
> And
> > maybe the NTE Equivalent Diodes will not work? But.... we have had good
> > luck in the past with the NTE replacements. Also, this was just a Really
> > Quick Google Search. All Resistors and Capacitors should be Standard
> parts.
> > Chokes, Coils and Transformers should be Good if the Rig is Operational.
> > The IC sourced from Alibaba.com is a Chinese Website. The minimum order
> is
> > 5 pieces.*
> > *                      So, there are my quick search results. Nothing
> > further to add. *
> >
> > *                                                        73 to All from
> > Wade/KJ4WS*
> >
> >
> >
> > On Thu, Nov 6, 2014 at 9:04 AM, <wt4t@reagan.com> wrote:
> >
> > > Sent my OMNI_VI to ten tec two weeks ago. Just was not running up to
> > > snuff,like it used to. Heard from them today. the rig was way out of
> > > alignment  and also the bandpass and bfo. They told me the noise I had
> in
> > > the rig was caused by the mixer board and that they have no parts left
> to
> > > be able to fix the mixer board. If I found another mixer board ,could
> it
> > be
> > > swapped out for the noisy board or is there realignment going to be
> > > required? or other changes made to the radio.
> > >    If a swept,any one have a good board they would part with?
> > > 73
> > > dale wt4t
> > >
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