[RTTY] Amertiron ALS-1300

[Bill Turner]

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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