I finally had the fans go off sporadically again, while I was monitoring the
temperature. At that time conditions were:
Voltage 13.2 V
Current: 1.3 A (second receiver off)
PA 35 C
FP 41 C
This was after the K3 had been “idling” all night, with no transmissions and
volume turned down to 0.
Personally, I wouldn't be concerned about the radio just yet. There's a couple
of other variables to check first.
How's the air flow around the radio?
What's the ambient temp right around the radio (not the room, but right next to
the radio)?
Any thing sitting on top of the radio? Heat
caused the problem. Monitoring the PA temp can be the
first step to solve the problem.
73s Steef PA2A
From: Tom Doligalski
To: Elecraft Reflector
Subject: [Elecraft] Cooling Fans
I am the original owner of K3/100 #969, which still works great.
I?ve noticed that recently the cooling fan comes
Hi,
FWIW.
Test conditions measured under the K3 DISP menu:
14.1V
1.38A Sub RX on
PA 32C
FP 40C
PA fans off
PA fans on/off at 36C/35C
Room temp 22C
K3 FP and PA temp sensors calibrated against a laboratory thermometer
adjacent to the K3.
Never really noticed when the PA fans come on in
Tom,
Interesting post. I thought this was the case with my K3 also, but i
figured out later that it was the fan in my power supply instead. Poor
hearing!
-de John NI0K
Tom Doligalski via Elecraft wrote on 7/19/2020 8:41 AM:
I am the original owner of K3/100 #969, which still works great.
I am the original owner of K3/100 #969, which still works great.
I’ve noticed that recently the cooling fan comes on occasionally even if the
radio is on, but not in use (volume down, no transmitting). FP temperature
shows 41 C, and PA temperature is at 35 C
This is not at objectionable at
Ref. the message below:
I have never had any fan noise from my K3 that I could hear except when running
a long winded qso on PSK31. Then the noise was barely discernable. #938.
Either I am stone deaf or Elecraft have gone to cheaper fans.
Dave KD1NA
I Bill NZ0T Wrote
As I'm not a very
They are talking about the fans on an external MFJ power supply. Not those on
the K3 :-)
73,
Eric
_..._
-Original Message-
From: David Robertson [EMAIL PROTECTED]
Date: Thursday, Aug 7, 2008 8:36 pm
Subject: [Elecraft] Cooling Fans
To: Elecraft elecraft@mailman.qth.net
Ref. the message
Usually the quieter fans are the more expensive ones...
On Thu, 2008-08-07 at 23:36 -0400, David Robertson wrote:
Ref. the message below:
I have never had any fan noise from my K3 that I could hear except when
running a long winded qso on PSK31. Then the noise was barely discernable.
I have to say that I expected the fans to be whisper quiet from all the
favorable posts I'd read before receiving my K3. My previous history is with
rigs having external cooling fins and no fans, so I'm probably spoiled
regarding fan noise. As much as I do love the K3, I hear the fans kick in
I don't have a K2 (yet), but I have a fair bit of experience with
trying to cool computer cabinets.
You can get a wide variety of 'box' fans, that vary greatly
in how much noise they make and how much air they draw. I'm
very fond of the ones that Antec sells - they cost a little
more, but have
Thanks to all for the input
When I build computers I also pay attention to the thermodynamics and
air flow inside the case. The fan on the CPU is pulling air through the
heat sink and away from the motherboard and the hot air is expelled out
the back or top of the case and cold air is drawn
Kevin;
You may not want to use foam tape. The heat's effect on the tape's
glue should create quite a mess and eventually eliminate the
stickiness of the tape. It would be interesting to know what other
folks have done to keep the fans in place.
On Oct 30, 2005, at 6:25 AM, R. Kevin
When I was experimenting with a box fan on top of the KPA100 heat sink, I
simply affixed four soft plastic feet to the corners. The kind one finds at
the hardware store to protect table tops, etc.
They had enough traction to keep the fan in place on top of the fins without
any other adhesive,
I use four desk drawer bumper pads. They are sticky on one side to
mount to the fan, round and about 3/8 diameter with enough friction to
keep the fan in place.
Works for me.
Tony W7GO
Jack Brindle wrote:
It would be interesting to know what other folks have done to keep
the fans in
Jack Brindle wrote:
Kevin;
You may not want to use foam tape. The heat's effect on the tape's glue
should create quite a mess and eventually eliminate the stickiness of
the tape. It would be interesting to know what other folks have done to
keep the fans in place.
I'm using a 3 fan on
At 09:28 AM 10/30/2005, Jack Brindle wrote:
It would be interesting to know what other
folks have done to keep the fans in place.
I took two small rectangles of cardboard, punched a hole at one end,
and secured them to the back of the K2 using the chassis screws.
The 12V 3 fans are lashed
Hello all.
I'm getting my K2/100 ready for sweeps and have decided to add some aux
cooling.
I have a couple of 3 computer case fans and was wondering from those
who've done the same about placement and whether blow the air onto the
heatsink or suck it through.
Thanks for your input.
R. Kevin
Kevin -
It has been my experience that blowing air onto a heat sink is usually
more effective than sucking air. If the heat sink is carefully
shrouded and the incoming airflow is properly controlled, then either
method is supposed to be effective. However, for uncontrolled or casual
Kevin,
The easiest solution is to simply lay the fan (horizontally) across the heat
sink fins. Suck the hot air away from the heat sink, that way it works in
tandem with the internal fan rather than fighting the internal fan
airstream.
73,
Don W3FPR
-Original Message-
I'm getting my
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm
Sent: Saturday, October 29, 2005 12:19 PM
To: R. Kevin Stover; Elecraft mailing list
Subject: RE: [Elecraft] Cooling fans
Kevin,
The easiest solution is to simply lay the fan (horizontally) across the heat
sink fins
Ten-Tec has a very nice model 310 cooling fan for the Orion,Omni,Corsair
series radios, that fits very nicely on the top of the K2/100, hangs a
little
bit off the rear, and if you use the tilt bail on the K2, you can use a
rubber
band to temp hold it on, have used it this way many times, works
Kevin;
For some of my K2 power tests, I've placed a single 12V fan on the heat sink
with 6-32 screws through the fan mounting holes to hold the fan about an
inch above the heat sink. The fan blows air down onto the top of the heat
sink. With that combination, I can run key down full power
G'day,
| sink fins. Suck the hot air away from the heat sink, that way it works
in
| tandem with the internal fan rather than fighting the internal fan
| airstream.
The air stream from the internal fan flows into the K2 under the KPA100
heatsink and emerges from the front. That way it keeps
-Original Message-
The air stream from the internal fan flows into the K2 under the KPA100
heatsink and emerges from the front. That way it keeps much of the heat
out of the box.
That is why I recommend pulling the air upward from the heat sink - so it
will help pull the air from
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