[Elecraft] KPA 500 Fan Noise

[Toby Pennington]

I have had the amp now about a year.

The cooling fan is just fine when using SSB, but when on cw and running a while at full output, the fan comes on and sounds like it is going to take off from the table. It is really loud

I have the fan speed set to 1, but wonder what others are doing to quieten the fan a little bit, or what fan speed you have the amp set to. OR WHATEVER > Toby W4CAK

[Donehrlich]

Toby,

I am far more sensitive to fan noise than most folks and have spent a
lot of time making my KPA500 much quieter by modifying it and by other
means. This topic is probably not of interest to most on this list
because, compared to most amps, the KPA500 is NOT loud (and many have
said it is much quieter). Contact me off list and I will be happy to
share my experience with you.

Don K7FJ

Post by Toby Pennington
I have had the amp now about a year.
The cooling fan is just fine when using SSB, but when on cw and running a while at full output, the fan comes on and sounds like it is going to take off from the table. It is really loud
I have the fan speed set to 1, but wonder what others are doing to quieten the fan a little bit, or what fan speed you have the amp set to. OR WHATEVER > Toby W4CAK
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[KQ8M]

Actually, I for one would like to know how you did it. Just because a select few don't care some of us do. Please share with us all.


73,
Tim Herrick, KQ8M
Charter Member North Coast Contesters
kq8m at kq8m.com

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-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Donehrlich at q.com
Sent: Tuesday, November 06, 2012 5:34 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA 500 Fan Noise

Toby,

I am far more sensitive to fan noise than most folks and have spent a
lot of time making my KPA500 much quieter by modifying it and by other
means. This topic is probably not of interest to most on this list
because, compared to most amps, the KPA500 is NOT loud (and many have
said it is much quieter). Contact me off list and I will be happy to
share my experience with you.

Don K7FJ

Post by Toby Pennington
I have had the amp now about a year.
The cooling fan is just fine when using SSB, but when on cw and running a while at full output, the fan comes on and sounds

like it is going to take off from the table. It is really loud

Post by Toby Pennington
I have the fan speed set to 1, but wonder what others are doing to quieten the fan a little bit, or what fan speed you have

the amp set to. OR WHATEVER > Toby W4CAK

Post by Toby Pennington
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Eric Swartz WA6HHQ - Elecraft]

Don,

Feel free to share it here.
73,

Eric
www.elecraft.com
_..._

Post by Donehrlich
Toby,
I am far more sensitive to fan noise than most folks and have spent a
lot of time making my KPA500 much quieter by modifying it and by other
means. This topic is probably not of interest to most on this list
because, compared to most amps, the KPA500 is NOT loud (and many have
said it is much quieter). Contact me off list and I will be happy to
share my experience with you.
Don K7FJ

[Toby Pennington]

Rich, You did not specify if your were on SSB or CW. There is no problem when on SSB.

The real issue is when on CW or RTTY. The constant cycling and roar of the last fan speed is
very unnerving.

Toby W4CAk

[Bill Frantz]

Noise canceling headphones might help. I got some for when our
ARES/RACES group works events like parades. I found them useful
for airplane trips. In my shack I have to deal with noise from
refrigerators, washing machines, driers and dishwashers. They
help there too.

Cheers - Bill, AE6JV

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