You did not show any of the prior information (one of the problems with
posts from Nabble), so I can only guess that you are working with a
power supply problem.
A situation like that is often caused by something loose in the negative
side of the supply, something that is frequently overlooked.
Good morning Don. The PS suddenly died on me at our beach house in Long Beach.
I had no equipment there and first
assumed it was my K3. Brought the rig home to Portland and it worked fine.
So, it was the supply, an Astron RS35A--couple years old.
Anyway, checked the fuse, cleaned contacts
Looking for an W2 wattmeter with the 2kw sensor. If you have one for sale
please send details such as condition and price shipped to zip 45324. Must be
from a non smoking environment.
Prefer to pay by Paypal.
Thanks
Tim
NZ8J
__
Sounds like you could be tripping the over voltage protection. When there is
no other
fault the current limiting built into the supply folds the current back so that
it does not
blow the fuse. You can disconnect the wire going to the scr that is the OV
clamp and see
if it's ok. You can then
With my old Fluke 97 in series with the PowerPole input to my
K3/10 (#6299), I saw 0 as the parasitic current. I couldn't even
measure anything on the microamp scale.
When I turned the K3 and P3/SVGA on, the current readings were
much higher on the meter than on the K3 internal meter. (On the
I have not found a way to change the minimum fan speed from the utility. Am
I overlooking it?
I find that when in a qso, if the fan control is set to NOR, then sometimes
the fan kicks up really high, I can tell it is at least up to level 5. If I
have it set to level 3, then it sometimes kicks
Gary,
One thing to check is the tightness of the screws for the supply output
terminals. If one or both are loose, I recommend removing them
completely and cleaning the contact points on the inside of the power
supply. Tighten everything else up too while you are at it.
You don't have to
Guess I should read the manual. Apparently KX3 is only good for 8 watts on 12
meters and up, although you can set it for 10 watts. Backing down to 8 watts
seems to solve the issue.
Jim
--
View this message in context:
Hi Jim,
A couple of thoughts I have a Kill A Watt meter for measuring line
power consumption and discovered it is VERY inaccurate at the low end of
its range. I was measuring an unloaded DC linear supply and at values of
a few mA it was high by a factor of 10 (!) compared to a Fluke 87V.
Hi Chuck,
You could use the Command Tester tab, and enter a command like
^FC5; (without the quotes).
If seems like a valid RFE for the KPA Utility, to add a user-friendly
control for this. Maybe contact support and suggest it or maybe
K6KR is listening...
73,
~iain / N6ML
On Thu,
Why didn't I think of this? I should have realized I could handle it this
way. Works great. I tested first with ^FC3; since that is the highest
minimum speed I want and at first thought it did not work because of other
noises in the shack. But ^FC5; left no doubt!
I should have posted my
Discharge the cap BEFORE trying to tighten or loosen the screws.
From: Vic K2VCO k2vco@gmail.com
To: elecraft@mailman.qth.net
Sent: Thursday, October 17, 2013 3:37 PM
Subject: Re: [Elecraft] K3 suddenly dies
Sometimes the screws holding the board to
Sometimes the screws holding the board to the capacitors loosen up after a few
years.
On 10/17/2013 7:14 AM, Gary, W7TEA wrote:
Good morning Don. The PS suddenly died on me at our beach house in Long Beach.
I had
no equipment there and first assumed it was my K3. Brought the rig home to
I have had the board off a couple of times to reseat and then to change out the
voltage reg IC and to
adjust the trimmer. I have done a visual inspection but will check that all
hardware is
securely fastened. May have to invest in another assembled board if nothing
else works.
Thank you all
On Thu, 17 Oct 2013 12:27:53 -0700 (PDT), W5UXH wrote:
I tested first with ^FC3; since that is the highest
minimum speed I want and at first thought it did not work because of other
noises in the shack. But ^FC5; left no doubt!
But why not let the thermostatic controller do its thing? And,
The reason is because then it does sometimes get up to level 5 and I prefer
to keep it below that, if using level 3 as the minimum happens to accomplish
that. Level 4 with headphones on is fine, level 5 is just a tad too
noticeable.
My only type of operation is CW, no monologues, sometimes as
I have an Astron 35A and was fishing around for details and found a guy
who talked about replacing the circuit board. I'm not sure it's
necessary, but here's the link:
http://www.repeater-builder.com/astron/pdf/w5bwc-rs35-rebuild.pdf
On Thu, 17 Oct 2013, Gary, W7TEA wrote:
I have had the
Thank you Hisashi! I called Astron and they quoted $26US including shipping.
Gary
On Oct 17, 2013, at 2:26 PM, Hisashi T Fujinaka [via Elecraft]
ml-node+s365791n757998...@n2.nabble.com wrote:
I have an Astron 35A and was fishing around for details and found a guy
who talked about
Re Wayne's possible explanation: My K3 (#266) draws around 39ma when it's
off and the 13.8v psu is on. It seems to be working normally in all
respects. Of course when my K3 is turned off the psu still delivers 13.8v
unless it, too, is turned off so if K3s do not turn off all the way when
Keep in mind that the article I sent you is a complete refurb that even
replaces the pass transistors.
I think googling around said the most likely culprit is a bad LM723, but
I didn't look too hard since my Astron was working fine before I decided
it made a nice footrest and bought a switching
Recently, I was asked to look over a K3 that had been purchased from someone
who had never managed to get the best out of his K3's setup.
When the filters in the main and sub rx were being checked for type and
location, I discovered a loose foreign body inside the K3. It reminded me
of the
On 10/16/2013 6:35 PM, Joe Subich, W4TV wrote:
I would suspect a display problem with the Watts Up ... like showing
the wrong range. I *measure* 4.4 mA and 4.2 mA respectively on my K3s
- s/n 622 and 1450 - with my trusty Fluke 85.
You're right, Joe. I pulled out my Fluke and an adapter I
So that leaves some K3s still drawing about 38 mA when switched off. Mine,
Geoff
G3UCK and I think there were a couple of others who commented yesterday.
Strange...
73 Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On
W2 found, thanks
Tim
NZ8J
__
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Please help
On Thu, 17 Oct 2013 13:46:46 -0700 (PDT), W5UXH wrote:
My daily sked has had his amp for a year or more and he experiences the same
behavior, he also leaves his at level 3 for the same reason.
Very interesting usage and heating results. You've obviously done your
homework. I think for most
Hi Gary,
Since I leave the fan at NOR most of the day, just bumping it up to
level 3 during the long qsos, the fan mostly does not run at all.
I still don't really understand why the fan sometimes kicks up a step
higher when I have it set to NOR than when I have it set to level 3. It
is not
I too have found that setting the KPA500 fan control for a slightly higher
speed all the time means that I don't have a big thermal buildup that
causes the fan to kick into high momentarily. Once I made that adjustment
the fan hardly ever goes above the middle setting.
73, Bob, WB4SON
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