;)
From: Wes (N7WS) w...@triconet.org
To: elecraft@mailman.qth.net
Sent: Wednesday, June 4, 2014 2:04 PM
Subject: Re: [Elecraft] KPA-500 fan noise
You mean the responses from the intrepid ham experimenters who have
historically
torn into their gear to improve it or the hand wringers who worship
And I just say what could possibly go wrong? Lol
Sent from my Cricket smartphone
Original message
From: Jim Brown j...@audiosystemsgroup.com
Date: 06/03/2014 21:43 (GMT-06:00)
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 fan noise
On 6/3/2014 7:11 PM
You mean the responses from the intrepid ham experimenters who have historically
torn into their gear to improve it or the hand wringers who worship in the house
of Elecraft?
Those are rhetorical questions, we both know the answer:-)
Wes N7WS
Homebrewing since 1958
On 6/3/2014 7:11 PM,
.
From: Jim Brown j...@audiosystemsgroup.com
To: elecraft@mailman.qth.net
Sent: Monday, June 2, 2014 11:16 AM
Subject: Re: [Elecraft] KPA-500 fan noise
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
of Elecraft
products.
73, Dick - W7QHE/4
===
Message: 9
Date: Mon, 02 Jun 2014 08:28:28 -0700
From: Fred Jensen k6...@foothill.net mailto:k6...@foothill.net
To: elecraft@mailman.qth.net mailto:elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 fan noise
Hooray!
BTW, what is the replacement fan you used in your K3?
Wes N7WS
On 6/3/2014 7:19 AM, Harry Yingst via Elecraft wrote:
I would tend to believe that replacing the cheap fans with
higher quality fans would be a improvement in design.
If the K3 cannot handle what little extra current
I rag chew - long winded rag chew - and have never been insulted by the
fan noises from the K3 or the KPA500. The noisiest they ever get is when
I turn the KPA500 off - as it drains the power supply down. Certainly
nothing like my previous tube type amp - providing over the air fan
noise. The
On 6/3/2014 7:19 AM, Harry Yingst via Elecraft wrote:
Replacing the fans was a worthwhile improvement and made copy easier.
Something does not compute. The fan in my KPA500 is pretty quiet on RX,
and only gets loud during long transmissions, continuing for a short
time (a few seconds) after
but not the bearings
From: Jim Brown j...@audiosystemsgroup.com
To: elecraft@mailman.qth.net
Sent: Tuesday, June 3, 2014 2:21 PM
Subject: Re: [Elecraft] KPA-500 fan noise
On 6/3/2014 7:19 AM, Harry Yingst via Elecraft wrote:
Replacing the fans was a worthwhile
...@audiosystemsgroup.com
To: elecraft@mailman.qth.net
Sent: Monday, June 2, 2014 11:16 AM
Subject: Re: [Elecraft] KPA-500 fan noise
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
Some of the responses here really make me shake my head.
Have fun. I learned long ago to not live in fear
From: Don Wilhelm w3...@embarqmail.com
To: elecraft@mailman.qth.net
Sent: Tuesday, June 3, 2014 5:20 PM
Subject: Re: [Elecraft] KPA-500 fan noise
the air rushing but not the bearings
*From:* Jim Brown j...@audiosystemsgroup.com
*To:* elecraft@mailman.qth.net
*Sent:* Tuesday, June 3, 2014 2:21 PM
*Subject:* Re: [Elecraft] KPA-500 fan noise
On 6/3/2014 7:19 AM, Harry
Thanks to all who replied. If I did not have to cut a hole in the sheet
rock, I would install a dryer vent!! I think I will try setting the fan
to a minimum speed as suggested and see how that works out keeping the
air moving all the time.
73s Jim, W4ATK
From: Jim Rogers jim.w4...@gmail.com
To: elecraft@mailman.qth.net
Sent: Monday, June 2, 2014 7:26 AM
Subject: Re: [Elecraft] KPA-500 fan noise
Thanks to all who replied. If I did not have to cut a hole in the sheet
rock, I would install a dryer vent!! I think I will try setting
On Mon, 2 Jun 2014 06:05:22 -0700 (PDT), Harry Yingst via Elecraft
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. The fan in the KPA is VERY loud when it hits the
last two speeds.
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
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,
will be still
running but you won't notice.
73
Fred, AE6QL
-Original Message-
From: Fred Jensen k6...@foothill.net
Sent: Jun 2, 2014 8:28 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 fan noise
Our Beverage Central is located in my shack. I was contemplating
putting a heat
-Original Message-
From: Fred Jensen k6...@foothill.net
Sent: Jun 2, 2014 8:28 AM
To: elecraft@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
If you set fan speed to Level 1 in the first place, it will run
continuously and avoid wide temperature variations.
I can work pileups in RTTY at 500W and the fan goes into Level 2 on rare
occasions and for a short time only.
IMHO, the NORmal setting is not the best one. Level 1 (constant) is
get more cooling
from an ice cube.
73
Fred, AE6QL
-Original Message-
From: riese-k3...@juno.com
Sent: Jun 2, 2014 9:29 AM
To: fptowns...@earthlink.net
Cc: k6...@foothill.net, elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 fan noise
you guys
add one of these less strain
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Please help support this email list:
Let's end this thread for now, since the original poster has had his query
answered. (And in the interest of keeping list volume under control.)
73,
Eric
List moderator
elecraft.com
On 6/2/2014 10:21 AM, Fred Townsend wrote:
How would that work Bob? Actually Peltier junctions do not create
@mailman.qth.net mailto:elecraft@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
On 6/2/2014 7:55 PM, Richard L Diddams, Sr. wrote:
My comment is not to K6GPW, but to the continuously number of postings
regarding Fan Noise.
Far more than necessary, IMO. Dick, the fan speed is adjusted by the
control system based on temperature of the output devices, which you can
I have been running some RTTY on 17M and FSK-441 on 6M meteor
scatter, both of which have full period signals for 30 seconds or so. I
have reduced power to 250W, but by the end of a transmissions the fan
has gone to 747 short field take off mode at about 71C. Am I missing
something here
Am I missing
something here or is this normal?
Sounds normal for mine. I've recently had mine on 52.525 in an FM QSO. I ended
up at about 250W with short transmissions. That didn't surprise me much at all,
because my KPA seems to produce quite a bit of heat on six meters anyway. Hit
the
On 6/1/2014 5:59 PM, AG0N-3055 wrote:
Sounds normal for mine.
Yes, quite normal. The KPA500 is very well protected, while still
allowing as much power output as possible. I do lots of RTTY contesting
on HF, and JT65 on several bands, including 6M. Depending on the ambient
temperature in the
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
__
Elecraft mailing
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
Don,
Feel free to share it here.
73,
Eric
www.elecraft.com
_..._
On Nov 6, 2012, at 2:34 PM, donehrl...@q.com donehrl...@q.com 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
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
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
] 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
Folks, this thread is drifting too far afield. Let's end the general fan
discussion at this time.
In the future, please resist the urge to post on OT threads like this when
there are already a lot of responses in a short period, like this one.
While OT threads are allowed, we ask that people
18, 2012 8:11 PM
Subject: [Elecraft] KPA 500 Fan Noise and cooling performance
On 6/18/2012 4:42 AM, David Robertson wrote: ( ... a long message I
won't include here where he improved amplifier cooling by tightening
heatsink/right panel screws and used heatsink compound.)
I operate my
: [Elecraft] KPA 500 Fan Noise and cooling performance
On 6/18/2012 4:42 AM, David Robertson wrote: ( ... a long message I
won't include here where he improved amplifier cooling by tightening
heatsink/right panel screws and used heatsink compound.)
I operate my KPA500 with the fan speed
On Tue, Jun 19, 2012 at 1:26 PM, Guy Olinger K2AV olin...@bellsouth.netwrote:
...I have tried to get after-market fans that were advertised as quiet,
but no luck...
===
Agreed. I recently built a tower computer and put in a neat-looking 18 cm.
fan in the top of the case. Because it is so
Solution - the Dyson blade less fan. Hihi
On Jun 19, 2012 1:41 PM, Tony Estep estept...@gmail.com wrote:
On Tue, Jun 19, 2012 at 1:26 PM, Guy Olinger K2AV olin...@bellsouth.net
wrote:
...I have tried to get after-market fans that were advertised as quiet,
but no luck...
===
Agreed.
My solution was to buy a Mac Mini, which is as quiet as a church mouse.
73,
Scott, N9AA
On 6/19/12 2:43 PM, Gerald Manthey wrote:
Solution - the Dyson blade less fan. Hihi
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Elecraft mailing list
Home:
Has anyone every operated one of those in close proximity to an HF rig?
We built such fans in College way back in the 1950's and they were a bad
of an RFI generator as any Tesla coil or Van De Graaf generator in the lab!
After all, they work by electrostatic discharge.
Ron AC7AC
I could be wrong, but I think that the Dyson bladeless fan has, in its
base, a regular ol' fan, with blades. As I understand it, that fan
blows air out of holes in the trailing edge of the circular airfoil.
Aerodynamic effects cause a larger volume of air to be dragged through
the airfoil
On 6/19/2012 11:26 AM, Guy Olinger K2AV wrote:
Computers quiet? Obviously have not heard mine. I have tried to get
after-market fans that were advertised as quiet, but no luck.
For a long time, I've been buying only top line Thinkpads (laptops), and
they're pretty quiet. Back when I was
It would be interesting and perhaps not good in the shack if this were
the case but these are not electrostatic.
they are nothing more than a fancy venturi to amplify air flow Air
enters the base of the unit through a “mixed flow impeller” a fancy name
for a turbo like fan. and is forced out
ABSOLUTELY! My HP mini-tower has what is called a whisper quiet fan and it
is very quiet. It certainly does not interfere with conversation, even when
carried on across our open office between desks ten feet apart.
And yet, when I power down the machine at the end of the day, the sudden
quiet is
On 6/18/2012 4:42 AM, David Robertson wrote: ( ... a long message I
won't include here where he improved amplifier cooling by tightening
heatsink/right panel screws and used heatsink compound.)
I operate my KPA500 with the fan speed set to #1 continuously which
delays the increase in the
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