KPA 500 Fan Noise

[Tobyp]

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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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

> 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
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[Tim Herrick]

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
[hidden email]

AR-Cluster V6 kq8m.no-ip.org
User Ports: 23, 7373  with local skimmer, 7374 without local skimmer
Server Ports: V6 3607, V4 Active 3605, V4 Passive 3606


-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of [hidden email]
Sent: Tuesday, November 06, 2012 5:34 PM
To: [hidden email]
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


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

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[Eric Swartz - WA6HHQ]

Don,

Feel free to share it here.
73,

Eric
www.elecraft.com
_..._

On Nov 6, 2012, at 2:34 PM, "[hidden email]" <[hidden email]> wrote:

> 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
>

______________________________________________________________
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