That's right - my focus was (perhaps too narrowly) on the behavior of
the power supply under load, not on losses in the system. Now if
someone can just tell me how to read the voltage at the transceiver - I
know there's a menu setting somewhere but my radio is fairly early and
the manual doesn't say.
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 4/25/2020 11:25 AM, hawley, charles j jr wrote:
I did notice that the post mentioned that his power supply dipped in voltage
but as for preventing issues due to low voltage, it's not your voltmeter on the
power supply that is the proper indicator. It is the voltage on the input to
the K3 that you should be noting. It's available on the menu and displays in
the VFO B area on the screen.
Jack BMW Motorcycles
Chuck KE9UW
c-haw...@illinois.edu
Sent from my iPad
On Apr 25, 2020, at 9:51 AM, N4ZR <n...@comcast.net> wrote:
For whatever it may be worth, my K3 is run through a West Mountain RigRunner
4005i, and the voltmeter on my SEC 1235M doesn't even flicker when I go
key-down at 100 watts.
I'm wondering if a 25-amp-rated supply (perhaps a little optimistic) might be
to blame. My K3 draws 20.2 amps at 100 watts key down.
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
On 4/25/2020 10:32 AM, Jim Rhodes wrote:
I had been using a power pole strip to power everything. After seeing some
discussion on this topic some time ago I found that in the string of 3
power pole connections in my setup at the time I was seeing around a 1 volt
drop in the voltage on the K3 metering between receive and 100 watts
keydown. That voltage drop was confirmed by my VOM so I wired the rig
directly to the supply and the voltage drop was less than 0.25 volts. That
is the way my rigs and VHF/UHF amps will be connected from now on with only
a fuse inline. The low current stuff will stay on the power pole strip
where they do just fine lighting up lights and stuff.
On Sat, Apr 25, 2020, 09:16 Don Schroder <donandde...@hotmail.com> wrote:
Bob,
Is it safe to run my K2 using Anderson Power Pole connections, and/or
RigRunner equipment?
For my info, what is the reason for NOT using them?
I’m rewiring, and I want to do it right!
Gunny, KE0PVQ
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
Windows 10
From: Gmail<mailto:anyone1...@gmail.com>
Sent: Saturday, April 25, 2020 9:03 AM
To: Bob McGraw K4TAX<mailto:rmcg...@blomand.net>
Cc: Elecraft@mailman.qth.net<mailto:Elecraft@mailman.qth.net>
Subject: Re: [Elecraft] K3S poor CW keying further investigation
Nuts, just measure the drop between radio and power supply see if it is
reasonable. Mine is 0.25 volts when transmitting. I run 14.0 out of supply.
Ray
W8LYJ
Sent from my iPad
On Apr 25, 2020, at 07:48, Bob McGraw K4TAX <rmcg...@blomand.net> wrote:
As to the RigRunner power pole strip.........PUT IT IN THE TRASH where
it belongs. NEVER NEVER NEVER use a power distribution strip to power a
100 watt radio. ALWAYS connect the radio direct to the power supply
terminals. NO exceptions!
73
Bob, K4TAX
On 4/25/2020 7:13 AM, Chuck Chandler wrote:
After more checking, I suspect the internal 100W amp is the common
factor
in the poor keying characteristics I'm seeing and hearing about from my
rig. I am trying to determine if my power supply is doing it's job.
I'm using a TenTec 963 switching supply rated at 25A continuous. At
rest
the K3S panel display shows 13.6V, with full power key down it dips to
11.5
or so. This seems like a lot. I'm running the power cable thru a
RigRunner Powerpole strip. If I can dig out another power supply from
the
packed boxes I can wire the K3S directly to the supply.
Is 11.5V at key down enough to cause the slow rise time being reported?
73 de Chuck, WS1L
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