Re: [TenTec] Airpax Polarity?

["James Duffer" <dufferjames@hotmail.com>]

I had an experience that occurred on a model 544 (the Triton with a digital 
display) and the matching power supply.  A series pass regulator transistor 
shorted thru putting over 24 volts into the transceiver.  I noticed the 
extremely bright display, and like an idiot for some reason I keyed the unit 
allowing the overvoltage to be applied to the xmtr circuits.  I had bought 
the unit new and had it just a week or two over one year which was the 
warranty period.  I went ahead and contacted Ten Tec after repairing the 
power supply.  They instructed me to send the 544 to them which I did.  I 
got it back repaired plus some other hardware modifications that had took 
place since I had got the unit.  No charge.  An Airpax would of prevented 
the problem.  I believe later powersupplies were improved with a crow-bar 
overvoltage protection circuit.  I have never used the Airpax, I still have 
an Omni VI (Opt 3) and matching power supply.
Take care, 73, Jim  de wd4air


> From: K5XS@aol.com
> Reply-To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
> To: tentec@contesting.com
> Subject: Re: [TenTec] Airpax Polarity?
> Date: Thu, 5 Apr 2007 18:20:56 EDT
>
>
>
> Hey Jim,
>
> That's what I intend to do, but was wondering if someone could shed some
> light.  I have been on-line reading application notes.  No revelations  so 
> far...
> 73,
> Bernie
>
> In a message dated 4/5/2007 5:18:34 P.M. Central Daylight Time,
> dufferjames@hotmail.com writes:
>
> Hey  Bernie,
>
> While it seems like there would be no polarity issues, why not  just 
> connect
> the line side to line and the other side to load to prevent  any doudt.
>
> Jim, wd4air
>
>
> >From:  <K5XS@aol.com>
> >To: <tentec@contesting.com>
> >Sent:  Thursday, April 05, 2007 5:38 PM
> >Subject: [TenTec] Airpax  Polarity?
> >
> >
> > > At the minimal cost, I decided to add  an Airpax T11-1-20.0A-01-11C-V 
> in
> >my
> > > power supply circuit  for my Orion II.
> > >
> > > I got the breaker (I got three, if  anyone wants one at what I paid, 
> let
> >me
> > > know) today, and  looking at it, I see what appears to be an arrow
> >indicating
> >  > "In" and another indicating "Out."  I note also that the lug with a  
> #1
> >is
> > > labeled "LINE," while the lug numbered #2 has no  other marking.
> > >
> > > Are these things polarized?   Does the "LINE" lug go to the +13.8VDC
> >source
> > > and the  non-LINE go to the positive terminal on the rig?
> > >
> > >  Thanks for any clues.
> > >
> > > Bernie  K5XS
>
>
>
>
>
>
>
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