[Elecraft] KPA1500 fan speeds and fan noise

[Bill Stravinsky]

 Feel free to do that with your kpa1500.  While you're at it test how long it takes to reach 60C with and without the modified fan system.I'm comfy with hearing the fans come on and I even set the fan speed to 1 or 2 if I'm in a contest mode.  I don't think there's a thing astoo much cooling for a solid state amp running 1500 watts.  The brief time I've played with mine it doesn't take too long to get to 60Cif you xmit enough.
Good luck.
BillK3WJV

    On Monday, May 21, 2018, 5:11:01 PM EDT, hawley, charles j jr <c-hawley at illinois.edu> wrote:  
 
 Seems like if the internal fans don't go on, that means the fan on the top is cooling the amp.

Chuck Hawley
 c-hawley at illinois.edu

 Amateur Radio, KE9UW
 aka Jack, BMW Motorcycles
________________________________________
From: elecraft-bounces at mailman.qth.net [elecraft-bounces at mailman.qth.net] on behalf of Bill Stravinsky via Elecraft [elecraft at mailman.qth.net]
Sent: Monday, May 21, 2018 8:01 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] KPA1500 fan speeds and fan noise

 That doesn't move any air across the heat sink or solid state devices that need the air.  The air that comes out of those vents starts at the fans in the rear.
BillK3WJV

    On Monday, May 21, 2018, 6:07:22 AM EDT, Roy Koeppe <k6xk at ncn.net> wrote:

 All,

My solution is two 4.5-inch, 48-volt dc muffin fans sitting on half-inch
tall rubber feet covering the top exhaust vent on amp. They are running on a
19-volt supply at a slow but effective cooling speed and are very quiet
(drawing air upward). During normal CW rag chewing the main fans do not come
on -- a vast improvement for a few bucks. When you go portable, just leave
'em home.

73,    Roy        K6XK












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