Check Q1 (MJE182) and U1B (LM6482). Most likely U1 is bad..
73/Roger - DL5RBW
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Hi
PA temp readings jumping from -110C to 110C, looks like troubles with
temperature sensor. Where to start dig?
Dan
LY4OO
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Picky, picky,
Old slide rule with wide calibration marks -- good enuff for government use.
73, RoyK6XK
-Original Message-
From: ANDY DURBIN
Sent: Tuesday, May 08, 2018 1:26 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 - PA- Temp
"46C = 118F"
46 deg C =
"46C = 118F"
46 deg C = 114.8 deg F. Maybe it was a typo?
73,
Andy k3wyc
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From: Ken Roberson via Elecraft
Sent: Sunday, May 06, 2018 10:01 AM
To: Elecraft Reflector
Subject: [Elecraft] K3 - PA- Temp
Hello all,
I know its a little early, but i'm testing a delta loop for field day on 20
meters.
The PA temp is running abt ( max ) 46 C @ 50 watts on FT-8 digi mode
Hello all,
I know its a little early, but i'm testing a delta loop for field day on 20
meters.
The PA temp is running abt ( max ) 46 C @ 50 watts on FT-8 digi mode.
Is this ok ?
73 Ken K5DNL
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How far away from room temperature should my PA be if I'm just receiving?
I noticed while testing in TEST mode that my fans kept turning on. After
turning on DISP, I noticed my PA temp at 37C (fans running). At 35C,
they turn off. Then, over a period of about two minutes, the PA creeps
up to
Joel,
Is the PA temperature correct in the menu? Do the PA Temperature
Calibration as indicated in the manual - it is easy, just turn the K3
off until everything is at room temperature, then power on and enter the
menu then set the menu temperature to match the room temperature.
73,
Don
To validate Wayne's suggestion . . .
K3 serial numbers 008 and 021 both exhibited this problem within two
years of their 2007 manufacture, and both were cured with the gold-pin
replacement fix.
Neither have exhibited any further misbehavior in the intervening years.
73,
Kent Trimble, K9ZTV
Hmmm ... I don't have a PA Temp problem, but ...
Occasionally, a tap or hold on a switch will cause some other action
other than the desired one. During NAQP SSB, I was running KPA500 off
but with the KAT500 [KAT3 bypassed]. The 500 was having some problems
on 160, so I bypassed it and was
I'd like to see how this is resolved. I note the silence about it after
your post.
My early K3 (sub s/n 500) started doing this same thing intermittently
several months ago. The problem occasionally got bad enough that the rig
would cut back to low power mode and report the PA over
If you put a DMM (voltmeter) on the associated pin, you should see the voltage
changing (a few mV, probably). You can easily get at these pins by taking the
bottom covers (A and B) off the radio. Chances are that the old, non-gold pins
on the front panel module are the cause.
73,
Wayne
N6KR
Thanks Wayne. I suspect that you are right. I'll collect the parts and
have them ready to go if the problem starts up again. Replacing header
pins like these is something I've done many times before so I anticipate
no problems with the repair. This radio has performed extremely well in
almost
Hi folks
K3 here owned for about 4 years.
Latest firmware.
Last couple of days at power up the PA Temp is unstable.
LCD flicks between 27 and 40 degs C.
TX and RX same reading.
Noticed the rear fans starting and stopping
Reloaded firmware no change.
Before lifting the hood anyone got a pointer
Thanks for the try Tom. No it is not transmitting. In fact, it is even
weirder than that, the finals heat up while the radio is turned off. It
draws 2 amps when off.
Buck
k4ia
K3 # 101 KX3 #715
On 4/27/2013 7:43 PM, Tom H Childers wrote:
Howdy Buck,
The first thing that comes to mind
Left the receiver on overnight and when I came down this morning I could
hear the fan running. That's odd. PA TEMP 45
If I turn off the power, the finals still heat up and when I turn the
power back on the HI TEMP warning activates, power is reduced and the PA
TEMP reads 105. Only way to
Howdy Buck,
The first thing that comes to mind is that a strait key has something
on top of it, but I sure you checked that. Is it possible that there
is a short in a keying circuit or maybe a foot switch that has
something on it or is shorted out while the rig is set in the CW
mode?
I don't
Buck,
If indeed the finals are heating while the K3 is truly in receive mode,
then that would indicate either the PA finals have 'turned belly up' or
that there is a failure in the bias circuits that is turning the PA
transistors on.
First unplug everything from the K3 except for a dummy load.
Don - thanks
If I let it sit while turned on, the fan will bring the temp down, then
I can turn the power back up and operate at 100w. The fans keep the PA
temp around 45C. So I don't think the finals have gone - yet.
It is drawing about 2 amps with the power turned off but plugged in and
Hi folks
K3 here has developed a slight problem with the PA temp sensing..
it is flicking between normal and +40 several times per minute.
noticed the fans starting in a very cold shack RX only running.
This may have been happening for a while, but never noticed until
the cooler mornings.
Early this SAT morning gettin gready to play in NAQP code I fired up
both K3's, the logging PC and such. I started double checking SO2R
setup in N1MM when all of a sudden radio #1 (K3 sn 594) flashed the
ERR 12v message, and I think it said CHECK CIRCUIT BREAKER etc. I
looked at circuit breaker
Hi Ron,
Yes, I would say they are related. From the owner's manual section on
troubleshooting transmit problems:
... low voltage may cause an erroneous temperature reading...
The ERR 12V message also indicates low voltage.
I think you're on the right track checking the circuit breaker lugs,
, there is always TX GATE
:)
-lu-w4lt-
K3 #3192
From: Fred Jensen k6...@foothill.net
Subject: [Elecraft] K3 PA Temp
To: Elecraft Reflector elecraft@mailman.qth.net
Date: Sunday, January 9, 2011, 1:24 PM
Playing around in the RTTY RU after a
full effort in NAQP CW yesterday.
? PA temp @100W
56C is no problem and well within our normal PA temp operating range.
Even the 84C limit is a conservative number with a fair amount of headroom.
73, Eric WA6HHQ
www.elecraft.com
===
On 1/9/2011 1:22 PM, Joe Planisky wrote:
Hi Fred,
According to the manual, the PA drops out at 84C, so
.
A couple of clamp-on chokes on both the positive and negative together
seem to have cleaned this issue up nicely.
Milt
AD5XD
--- On Sun, 1/9/11, Fred Jensen k6...@foothill.net wrote:
From: Fred Jensen k6...@foothill.net
Subject: [Elecraft] K3 PA Temp
To: Elecraft Reflector elecraft
Oh, and I forgot to mention the 12 vdc muffin fan that I have sitting on
the top that blows air into the rig.
Milt
AD5XD
--- On Mon, 1/10/11, Milton marl...@flash.net wrote:
From: Milton marl...@flash.net
Subject: Re: [Elecraft] K3 PA Temp
To: Elecraft Reflector elecraft@mailman.qth.net
Playing around in the RTTY RU after a full effort in NAQP CW yesterday.
PA temp @100W gets up to about 56C while CQ'ing, so I backed off to
80W. Anyone know how hot is too hot?
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 2011 Cal QSO Party 1-2 Oct 2011
- www.cqp.org
@mailman.qth.net
Sent: Sunday, January 09, 2011 1:24 PM
Subject: [Elecraft] K3 PA Temp
Playing around in the RTTY RU after a full effort in NAQP CW yesterday.
PA temp @100W gets up to about 56C while CQ'ing, so I backed off to
80W. Anyone know how hot is too hot?
73,
Fred K6DGW
- Northern
--- On Sun, 1/9/11, Fred Jensen k6...@foothill.net wrote:
From: Fred Jensen k6...@foothill.net
Subject: [Elecraft] K3 PA Temp
To: Elecraft Reflector elecraft@mailman.qth.net
Date: Sunday, January 9, 2011, 7:24 PM
Playing around in the RTTY RU after a full effort in NAQP CW yesterday.
PA temp
Hi Fred,
According to the manual, the PA drops out at 84C, so that's clearly the upper
limit that Elecraft thought was safe. I routinely see PA temperatures of 60C -
65C when running 100% modes like RTTY, PSK31, etc. into a well matched load for
more than a minute or two. I have performed
--- G4ILO [EMAIL PROTECTED] wrote:
hank k8dd-3 wrote:
I was sitting in a pileup at 90 watts and watching
the PA Temp - it got up
to around 41 or 42 C (about 100 F) so I turned the
fan up a notch or two
and it cooled right back down to around 20 C (70
F).
How did you turn up
stopped.
Did you experience either of these?
73,
Dennis, K2SX
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of hank k8dd
Sent: Wednesday, June 04, 2008 4:43 PM
To: G4ILO
Cc: Elecraft Reflector
Subject: Re: [Elecraft] [K3] PA Temp
--- G4ILO [EMAIL PROTECTED
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