Thanks, Ben. Exactly the kind of info I'm looking for.
BTW, I never have any trouble copying you in contests!
73, Bill W6WRT
------------ ORIGINAL MESSAGE ------------ Sun, 24 Aug 2014 09:31:57
-0400, Ben wrote:
>Bill,
>
>I run an ALS-1300 in HP RTTY contests, I specifically asked Hy-Gain
>tech support about power limits, they advised running 500 - 600
>watts at most in RTTY mode (that advice, only run at 50% applies to
>any of the Hy-Gain No-Tune FET amps, the ALS-600s and the
>ALS-500s). It can hit the limit, but the 4 muffin fans inside
>start whining and pumping out very warm/hot air, and after a short
>bit, the internal thermal protection circuit cuts the amp off an it
>runs pass-thru till things cool down again (requiring a manual
>reset). I don't know if more powerful fans, externally mounted,
>would let me run longer at full output, but that is risking $800 -
>$900 of FET replacement cost for what? one or two S-units? 500-600
>wts cuts a path to anywhere in the world for me. But, overall, the
>ALS-1300 is a sweet piece of equipment, I have designed an automatic
>band switcher circuit for my Orion that makes using it totally
>transparent during contesting or DXing. One thing to pay attention
>to, though, is the depth of the case. It won't fit on a 12" book
>shelf without sticking out several inches.
>
>73,
>Ben - WB2RHM
>
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