[Elecraft] KPA500 question about cooling

[Brian Alsop]

Keep in mind the fan may come on more and end up at higher speeds more 
ofter if you put the KAT500 on top.   That is not to say it will 
overheat.  Fan noise for some is a KPA500 issue.

73 de Brian/K3KO

On 5/27/2013 13:39, Fred Smith wrote:
> I guess it boils down to whatever trips your trigger and the people who
> designed it said to put it on top if you wanted, no problems.
>
>
> 73,
> Fred/N0AZZ
> K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100
> P3/SVGA--KPA500--KAT500--W2
>
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Richard Gillingham
> Sent: Monday, May 27, 2013 8:31 AM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] KPA500 question about cooling
>
> Yes.
> The very first statement under Installation in the KPA500 owner's manual is
> the following:
>
> "IMPORTANT:  Provide at least 2 inches (5 cm) clearance behind the fan and
> above the amplifier for proper air flow."
>
> Nuf said.
>
> 73,
> Gil, W1RG
>
>
>> From: w4as at bellsouth.net
>> Date: Sun, 26 May 2013 23:39:00 -0400
>> To: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] KPA500 question about cooling
>>
>> I do a lot of meteor scatter on 6 meters, and I've tried the tuner both
> above and below the amp.
>>
>> I've found the KPA500 runs cooler with the KAT500 tuner below the amp.
>>
>> 73 de Sebastian, W4AS
>>
>>
>>
>> On May 26, 2013, at 6:23 PM, mcduffie at ag0n.net wrote:
>>
>>> On Sun, 26 May 2013 15:06:25 -0700, Ron D'Eau Claire wrote:
>>>
>>>> The KAT500 may be placed on TOP or under the KPA500.
>>>
>>> I wouldn't put it on top.  I can hear fan and air changes if I get
> within a half
>>> inch of the intake slots with my hand at higher speeds.  You can feel
> the air
>>> flow considerably at high speed with your hand an inch over the opening.
> That
>>> means it does affect the airflow to put something that close.  I don't
> care if
>>> the factory or a manual says you can do it.  I sure wouldn't run mine
> that way.
>>>
>>> Gary
>>
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