[TenTec] Airpax

[Alan Sewell]

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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