Interesting post from Wayne regarding the low fan noise from the
KPA1500. So, I have to ask about fan noise and the KPA500.
Background: I run my KPA500 all the time - my K3 is a 500 Watt XCVR.
From time to time, in particular during AM operation, the fan comes on
and moves right on up in the
Is loud fan noise common with smaller solid state amps? I have read
complaints about the SPE Expert 1.3k loud fan noise and the new Flex Power
Genius sounds pretty loud in the demo video. I have the fan on my KPA500
set to 4 (if I recall correctly) and it is pretty quiet however setting it
one
Noiseblocker does too (92x92x25), which I prefer due to color. :) I have no
idea if this is the correct size for the KPA500, I don't have one, and
can't vouch for doing the mod. BlackSilentPro would be the model I've used
in past fan replacements on switches and such. Disclaimer, I have no idea
"Its to bad a replacement fan for the KPA500 from Noctua can't be found
these are well engineered fans moving more air and quietly"
Is the fan in the KPA500 a 92mm fan? Noctua makes a 92x92x25 mm fan...
__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 2/12/2017
*/ I put a Noctua NF-A9x14 PWM pusher fan on the inlet this helped a
bit,with a typical over during a cw rag chew at 28 wpm delays the onset
of high speed by a couple of minutes depending on the temp in the shack.
With the big fan on the back *off* my idle temp is 31c with *no* the
helper
*/I have been so happy with the pair of Noctua fans I put on the back of
my K3 very very quite moves a lot of air,
so I looked for a way to help my KPA500 cool better because Noctua does
not make a fan that will work as a replacement for the fan on the amp.
What I did was get a *helper* fan
have considered ordering a
replacementtop for the KPA500 and opening up the slits and putting a screen in
their place.
From: Arthur Nienhouse <ka9...@gmail.com>
To: Elecraft@mailman.qth.net
Sent: Friday, September 4, 2015 9:50 AM
Subject: [Elecraft] KPA500 fan noise
*/I hav
Art:
Thanks for the info on the helper fan. I just bought one from the
Amazon link you provided. Strangely enough, heat is never a problem
here in the summer as the Central
Air always keeps the shack cool (Basement). During the winter is when
the shack gets warm as the furnace runs quite a
During a normal rag chew after three or four minutes, the temp on my
KPA500 hits 70 degrees and the fans are at full blast. It is difficult
to hear over the fan noise even when using headphones. Running 480 watts
out (verified on a calibrated wattmeter) on 20 meters. SWR is 1.0:1.
Is this
rkholder" <tabn...@centurylink.net>
To: <Elecraft@mailman.qth.net>
Sent: Thursday, September 03, 2015 11:58 AM
Subject: [Elecraft] KPA500 fan noise
During a normal rag chew after three or four minutes, the temp on my KPA500 hits
70 degrees and the fans are at full blast. It is difficult to he
Mine does kick up speed @ 50C. I've only had an SB 200, SB 220,
Ameritron 811h the KPA. None had the ramp up feature like the KPA.
It's the quietest of all I've had even running on it's higher speed.
When it's idling or resting vs. the the other amps...Forget abt it.
They let you know
WELL, I SOLVED THE FAN NOISE ON MY KPA500. HAVING HAD SOLID STATE AMPS IN THE
PAST I LIKE TO RUN THE FAN AT THE LOW NUMBER ONE SPEED. I'VE BEEN BUGGED ABOUT
SOME FAN NOISE WHICH I'M SURE WOULDN'T BOTHER OTHERS BUT DID ME. I WENT TO
RADIO SHACK AND GOT A PACK OF GROMMETS. I USED THE SMALL
One thing I tried during a recent contest was to set FAN CTL = 1 during
the contest, or at least whenever I was CQing. The noise level stayed
constant instead of jumping up and down with the PA temperature, and a
constant noise level is easier to cope with. Outside of contests, I set
FAN CTL =
...I spent a lot of time making my KPA500 much quieter by modifying it...
Please post your experiences, Don.
During the SS CW, I was (for the first time) conscious of the fan noise
when it went into 'high gear' during extended CQs. It did make the weak
sigs more difficult to copy (even through my
14 matches
Mail list logo
