[TenTec] Airpax

[Carl Moreschi]

The Omni VII has a shutdown circuit inside it that is even faster than the
airpax.  So the Omni VII never needs an airpax.

Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message ----- 
From: "Alan Sewell" <alan.n5na at gmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Thursday, March 29, 2007 10:09 PM
Subject: Re: [TenTec] Airpax


> Yes, both Orions list as a feature:
>
> "Over-voltage protection, current protection for final transistors and
> thermal shutdown are built-in."
>
> I've never had my Orion shut down but I have had my Omni VII shut off
> when I accidentally had the wrong antenna selected.
>
> The Airpax does add another level of protection and peace of mind!
>
> 73,
>
> Alan  N5NA
>
> http://www.tentecwiki.org
>
>
>
> Robert Carroll wrote:
> > At the risk of reigniting a hot topic, this morning I developed a sudden
SWR
> > problem while running barefoot this AM.  I was running 100W from my
Orion
> > 565 when I saw my digital meter jump up to around 4:1 SWR  and the
Airpax
> > breaker I had "protecting" the Orion (Astron supply) tripped for the
first
> > time ever.  Holding my breath, I turned the Orion power switch off and
reset
> > the Airpax.  To my great relief all was well-or at least it seems to be
12
> > hours later.  No fuse in the Orion blew.  I understand there is a
protection
> > circuit in the Orion which eliminates the need for an external breaker.
> > Perhaps that would have protected the finals, but it didn't prevent the
> > Orion from sucking enough current to trip the Airpax and that makes me
> > wonder if I would have been packing the set up for shipment to TN if the
> > Airpax had not been in line.  I have never been convinced that the
Airpax
> > was necessary, but when it clicked off, I was very glad I had installed
it.
> >
> >
> >
> > I never did find anything wrong with the antenna system, and I ran at
legal
> > limit calling the 3B1 this AM with no problem.  I did go out this
afternoon
> > and spray some Caig on two connectors and a barrel.  But there may be a
> > problem waiting to reappear.
> >
> >
> >
> > FWIW
> >
> > 73
> >
> > Bob W2WG
> >
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> >
> >
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