To compare apples to apples where it is important, compare the CFM
rating at low, medium and high speeds. The RPM is only indirectly
related to the air moving capabilities. Things like blade shape,
ducting, and other similar parameters all contribute to the fan
efficiency and the amount of no
That's a 12MB (medium speed), not a 12LB (low speed). 3700 RPM max vs
2800 RPM max. Not the same thing.
73
--
Joe KB8AP
On Jul 2, 2010, at 6:11 PM, Steve Ellington wrote:
> Google brings up many sources for Elina. Here's one:
> http://www.myofficesupplyzone.com/2-193870011-B0038OT78G-Elina_H
Joe Planisky :
> Since the responses to my inquiry about K3 fan brands/models have
> virtually stopped, I thought I'd post the results.
It's also worth checking sites like silentpcreview.com, buildsilentpc.com,
endpcnoise.com, etc. for near-silent fans.
..
;
Sent: Thursday, May 27, 2010 2:28 PM
Subject: Re: [Elecraft] [K3] K3 fan noise, part XXLIV
> Since the responses to my inquiry about K3 fan brands/models have
> virtually stopped, I thought I'd post the results. There are indeed
> at least 2 different fans in use in K3s:
>
>
2010 4:40 AM
To: ;
Cc: "Elecraft List"
Subject: Re: [Elecraft] [K3] K3 fan noise, part XXLIV
> PA temp was rising up to 55ºC, the 2 fans were not audible
> from my
> chair.
===
If you didn't exceed 55C, You may not have gotten to high speed
with th
I have to agree with the idea that this is about ears.
At one time in my youth I could hear the 15k whine from a TV
horizontal flyback transformer if a TV was on in the room. The sound
was part of the TV and I had to listen to it to watch TV. It was
clear, and loud. I could clearly hear harmonic
---
From: "Philippe Trottet"
Sent: Sunday, May 30, 2010 4:40 AM
To: ;
Cc: "Elecraft List"
Subject: Re: [Elecraft] [K3] K3 fan noise, part XXLIV
> PA temp was rising up to 55ºC, the 2 fans were not audible
> from my
> chair.
=
My fans are just audible. My shack is quiet. They even come on occasionally
in receive mode. I like the idea I can hear them. I know they are working
:-).
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-K3-fan-noise-part-XXLIV-tp5091127p5118994.html
Sent from the [K3] m
Hi All,
I can't hear the fans at all after 40 years in ship yards and construction
sites.
73
Tim
gm4lmh
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Post: ma
I've come to the conclusion that this discussion is really about EARSNot
fans!
Steve
N4LQ
- Original Message -
From: "Joe Planisky"
To: "Elecraft List"
Sent: Sunday, May 30, 2010 9:25 AM
Subject: Re: [Elecraft] [K3] K3 fan noise, part XXLIV
> Tha
Thanks for the responses, folks. I've got all the info I need for the
moment.
73
--
Joe KB8AP
On May 27, 2010, at 11:28 AM, Joe Planisky wrote:
> Since the responses to my inquiry about K3 fan brands/models have
> virtually stopped, I thought I'd post the results.
I have two K3s, one with the Elina fan and other with the UTEC fan. I have
checked both radios at all fan levels. They are the same to me at all levels.
The fans in both radios are very quiet. I see no performance difference in
the fans. Roy Morris W4WFB
__
Following the discussion, I made a full power test with my K3/100 on the
dummy load, and no noise in the room...My wife & 4 years old son were
away !
PA temp was rising up to 55ºC, the 2 fans were not audible from my
chair. I could heard barely if I put my ears very close to them and feel
the heat
I have yet to hear the fan on my K3/100. I have a fairly noisy computer
though, so that may be masking it. SN 3539.
73, Mike NF4L
Ross Primrose N4RP wrote:
> Is this fan noise an issue with 10W K3s, or only with the 100w PAs? I
> expect to be able to purchase a 10W K3 sometime this fall, and I'd
> Is this fan noise an issue with 10W K3s, or only with the 100w PAs?
The 10W radio has no fan.
73,
Lyl eKK7P
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Post:
Is this fan noise an issue with 10W K3s, or only with the 100w PAs? I
expect to be able to purchase a 10W K3 sometime this fall, and I'd be
disappointed if I had to listen to the fan...
73, Ross N4RP
--
FCC Section 97.313(a) “At all times, an amateur station must use the minimum
transmitter p
: "Elecraft List"
Sent: Saturday, May 29, 2010 2:27 PM
Subject: Re: [Elecraft] [K3] K3 fan noise, part XXLIV
> That assumes that the airflow is the predominant source of
> noise. In my case, the airflow noise is secondary to
> what I believe is bearing noise. At low speed
That assumes that the airflow is the predominant source of noise. In
my case, the airflow noise is secondary to what I believe is bearing
noise. At low speeds, this "motor noise" is what I hear mostly. It
is the same across 2 sets of UTEC fans.
I've posted a recording of my K3 fans at htt
You can download a pretty good spl meter for the iphone through the App Store.
It is free and works well. Search for sound meter at the App Store.
I downloaded it at a rock concert with a friend's kids -- went immediately to
the drug store and bought ear plugs.
73 de W6BK
On May 29, 2010, a
> It seems pretty clear that the early fans were indeed
> silent, certainly the
> same cannot be said of the UTEC ones in my #980. Gary
> kindly even sent me
> some more but the difference was negligible. I have spent
> a lot of time on
> this, even mounting the fan panel on rubber bushes - al
All of this backs up comments I made on this list a year or so ago, and at
that time hardly anyone agreed with me!
It seems pretty clear that the early fans were indeed silent, certainly the
same cannot be said of the UTEC ones in my #980. Gary kindly even sent me
some more but the difference was
Joe Planisky wrote:
> From the responses I received, it looks like the Elina fans were used
> on earlier K3s with serial numbers < 900 or so.
>
> I received responses from 13 people (including myself), covering 13
> K3s. If the reporter used words or phrases like "quiet", "silent",
> "nev
Well go ahead and put me down for having the UTEC fans in SN#1116.
I'd say that the fans are perfectly reasonable yet they are clearly
audible when they are running. When they step up into high gear they
are very clearly heard and this is in a room full of computers with
several fans in each one.
The p-value is 0.07 (Fisher Exact test). Not dramatically
significant, but well above the "statistically virtually meaningless"
level.
You might write back to your respondents and see if there are any
differences in the K3s, such as the amount of empty space inside, or
in settings.
Peter
Since the responses to my inquiry about K3 fan brands/models have
virtually stopped, I thought I'd post the results. There are indeed
at least 2 different fans in use in K3s:
Elina HDF6015L-12LB-1 and UTEC AT6015L-12L2B-ND2 and ND5
The Elina fans are made by Inaba Denki Sangyo, a Japanese co
Joe - while I appreciate your concern for cluttering the list with fan noise
"noise," that's exactly what these lists are for -- discussion -- and now
there are loads of tools and filtering options for incoming email. Gmail's
threads for example will keep all related messages together (if subject
Fan noise on my K3 is very slight. Not a problem here.
Dave, N4QS
- Original Message -
From: "Joe Planisky"
To: "Elecraft List"
Sent: Sunday, May 23, 2010 11:19 AM
Subject: [Elecraft] [K3] K3 fan noise, part XXLIV
> The topic of K3 fan noise seems to come up
The topic of K3 fan noise seems to come up every now and then, and
each time it does there's a chorus of people who say the fans in their
K3 are absolutely silent, and an equal chorus of people who say the
fans are clearly audible.
I'm in the latter camp. I hate fan noise and I can clearly h
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