[Elecraft] KPA-500 fan noise

[Fred Townsend]

How would that work Bob? Actually Peltier junctions do not create cold. They move heat and then the distance the heat is moved is less than a quarter inch and you end up with more heat than you started with. BTW you need a heat sink for the back side of the Peltier. Back to square one. You can get more cooling from an ice cube.
73
Fred, AE6QL



-----Original Message-----
>From: riese-k3djc at juno.com
>Sent: Jun 2, 2014 9:29 AM
>To: fptownsend at earthlink.net
>Cc: k6dgw at foothill.net, elecraft at mailman.qth.net
>Subject: Re: [Elecraft] KPA-500 fan noise
>
>you guys
>
>add one of these less strain on the fan and ur ears
>
>Bob K3DJC
>
>http://en.wikipedia.org/wiki/Thermoelectric_cooling
>
>
>
>n Mon, 2 Jun 2014 08:46:45 -0700 (GMT-07:00) Fred Townsend
><fptownsend at earthlink.net> writes:
>> I would hate to think what would happen if a water line breaks. Why 
>> not duct the air from a portable AC unit to the KPA-500. Then when 
>> the ducting breaks you won't have water all over the place... just 
>> cool air.
>> Seriously folks, any chance the exhaust air from the KPA is being 
>> fed back into the air intake for the KPA? That will heat things up 
>> in a hurry. Maybe outside air (depending where you live) ducted to 
>> the KPA would keep things cooler. Failing that just empty the 
>> contents of the beverage cooler into your stomach and after a while 
>> the whole room will be spinning. The fans will be still running but 
>> you won't notice.
>> 73
>> Fred, AE6QL
>> 
>> -----Original Message-----
>> >From: Fred Jensen <k6dgw at foothill.net>
>> >Sent: Jun 2, 2014 8:28 AM
>> >To: elecraft at mailman.qth.net
>> >Subject: Re: [Elecraft] KPA-500 fan noise
>> >
>> >Our "Beverage Central" is located in my shack.  I was contemplating 
>> 
>> >putting a heat exchanger on the KAP500 PA's and routing cold water 
>> from 
>> >the drink fridge through it.  I guess that would class as 
>> >"re-engineering?"  Haven't figured out how to get the plumbing out 
>> of 
>> >the fridge, however.
>> >
>> >73,
>> >
>> >Fred K6DGW
>> >- Northern California Contest Club
>> >- CU in the 2014 Cal QSO Party 4-5 Oct 2014
>> >- www.cqp.org
>> >
>> >On 6/2/2014 8:16 AM, Jim Brown wrote:
>> >> On 6/2/2014 7:56 AM, AG0N-3055 wrote:
>> >>>> You could always try replacing the fan with a quieter fan.
>> >>> I would consider that myself, but only with one recommended by 
>> the
>> >>> good people at Elecraft.
>> >>
>> >> It is generally a bad idea to try to re-engineer a product, 
>> especially
>> >> one that is well designed. In this case, I would consider it a 
>> really
>> >> bad idea.
>> >
>> >
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>