Odd, I ran mine in a barn for ten years with no HVAC... freezing cold and
super hot with high humidity... never had the problems you described.
Imagine that!
73,
Dave
wa3gin
----- Original Message -----
From: "Charles Harpole" <k4vud@hotmail.com>
To: <amps@contesting.com>
Sent: Sunday, January 15, 2012 9:23 AM
Subject: [Amps] 87a cured
>
> For over 5 years, my Alpha has sat in the shack with high humidity and
> temps of 30-34C. During that time, it automatically went to Fault 9...
> and sometimes Fault 20.... when tried to use. The "go to fault" was all
> over the map in terms of when it would occur but it was usually early
> after turn on. The air conditioner would be switched on in the shack only
> during operations.
>
> My very smart friend worked on it several times, including replacing all
> those expensive PIN diodes, but the problem reappeared soon after that.
>
> On advice of several locals, I began recently to run my shack air
> conditioner continuously at about 25C. and set to "Dry." After abt 40
> hours, I tried the 87a. Perfect operation resulted with no other changes.
> It now drives, outputs RF, and in all ways works as it should.
>
> I guess it just likes cool and dry. Or the local spirits do. 73,
>
> Charles Harpole k4vud@hotmail.com
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