I’m pretty sure the first homebrew project I ever made was a switched outlet
strip using utility boxes on a 1x3. Might be worth doing that again and adding
some good filtering.
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
> On Jul 2, 2021, at 1:10 AM, Jim
On 7/1/2021 2:24 PM, Bob McGraw wrote:
One thing that really concerns me is the use of power distribution strips.
That's the least of the problems -- the MOVs built into many (most?)
strips. advertised as surge protection are more likely to CAUSE
destructive failures of interconnected
and power it
down using the #3, #2, #1 sequence.
73
Bob, K4TAX
Message: 3
Date: Thu, 1 Jul 2021 10:00:27 -0700
From: John Nicholson
To: Buck
Cc:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Temperature or Warmth of KPA500 when "Off" ?
Message-ID:
Content-Type: text/plain; charset=utf
I use a sine wave UPS in the shack and an IOTA 55 amp power supply for
the rigs is plugged into that. Power blips and short outages do not affect
the station with the exception that the KPA500 will drop out since it is
running on 240V. The UPS provides more than enough time to safely shut
down
On 7/1/2021 10:49 AM, Bob McGraw wrote:
As to shutting down the Elecraft equipment.
It is VERY important to turn the K3 and K3S off at the radio, NOT by
killing power it. When turned off, the rig writes its current state to
memory, so comes back to where it was when turned on next. If power
t; On Behalf Of Ken Winterling
> Sent: Thursday, July 1, 2021 11:26 AM
> To: John Nicholson
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] Temperature or Warmth of KPA500 when "Off" ?
>
> John,
>
> You could build a 220/240V outlet with a remote switch using a coupl
, July 1, 2021 11:26 AM
To: John Nicholson
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Temperature or Warmth of KPA500 when "Off" ?
John,
You could build a 220/240V outlet with a remote switch using a couple
electrical boxes.
Ken
WA2LBI
On Thu, Jul 1, 2021 at 1:01 PM John Nichol
John,
You could build a 220/240V outlet with a remote switch using a couple
electrical boxes.
Ken
WA2LBI
On Thu, Jul 1, 2021 at 1:01 PM John Nicholson
wrote:
> Does anyone know if there is such a thing as a 220V power strip? My
> searches come up empty handed. I would like to plug the
, elecraft-requ...@mailman.qth.net wrote:
Message: 1
Date: Thu, 1 Jul 2021 00:37:49 +
From: Tim C
To:"Elecraft@mailman.qth.net"
Subject: Re: [Elecraft] Temperature or Warmth of KPA500 when "Off" ?
Message-ID:
Content-Type: text/plain; charset="us-ascii"
Does anyone know if there is such a thing as a 220V power strip? My searches
come up empty handed. I would like to plug the KPA500 into the strip to turn it
totally on off. The power switch on the back of the amp is inconvenient to
reach in my shack.
John K7FD
> On Jul 1, 2021, at 9:21 AM,
Another interesting side note - the 12 volt rail in the K3 is "ON" all
the time, even when the K3 is turned off. I found that out when one of
the finals developed a partial short and the radio was drawing 2 amps
when turned "OFF."
If you are not using equipment, find a way to disconnect the
Maybe so. But this is an old design.
> On Jul 1, 2021, at 04:50, David Woolley wrote:
>
> I don't think this design would be acceptable in modern consumer equipment,
> at least not in Europe. Typically they would have an auxiliary power supply
> for the microcontroller, to reduce power
I don't think this design would be acceptable in modern consumer
equipment, at least not in Europe. Typically they would have an
auxiliary power supply for the microcontroller, to reduce power
consumption to well under 1 watt, and maintain a reasonably good power
factor, when in a soft power
I've read this whole thread and I'm confused. I control my KPA500 and KAT500
remotely. When shutting down my station is shutting down the Elecraft
equipment adequate remotely?
Thanks ES 73 DE TIM WB8HRO
__
Elecraft mailing list
I can answer this. It is normal. The microcontroller is on, but sleeping when
the rear-panel power switch is on. It needs to run to be able to respond to
serial commands and for the front-panel power-on button to work. It is powered
by the 5V linear regulator, which is providing the heat you
I would assume so, as mine is the same way... So unless both of our
KPA500's have failed in the same way, at the same time, it is more than
likely normal. A short call to Elecraft will answer your question with
more surety.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer
"But, is this normal? I assume that there is a small current powering a micro
processor and its related circuitry but should it be actually that warm — is
there a cpu burning "idle loop" used and thus causing high current flow thru
the processor. "
My KPA500 draws 0.14 A when "On" and in
Solid state filaments?
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Please help
Yes, there is a master switch. I think I forgot about that.
> On Jun 30, 2021, at 8:47 AM, Ken Winterling wrote:
>
> Phil,
>
> No need to unplug the KPA500 when not in use. There is a master power
> switch on the rear panel that will disconnect everything.
>
> Ken
> WA2LBI
>
>
>
>
>
>
Morning Phil,
Also living in the NW, (Eugene), do I fully understand your concern...
There is a switch in the rear left of the cabinet as seen from the
front. I believe that will kill power to most of the amp.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL
Phil,
No need to unplug the KPA500 when not in use. There is a master power
switch on the rear panel that will disconnect everything.
Ken
WA2LBI
On Wed, Jun 30, 2021 at 11:41 AM Louandzip via Elecraft <
elecraft@mailman.qth.net> wrote:
> I use a clamp on ammeter and a short power cord
I use a clamp on ammeter and a short power cord jumper with the wires
separated where I can clamp over the black wire. That quantitatively tells me
the power being consumed/dissipated. Keep in mind temperature is intensive
whereas heat is extensive.
Lou W7HV
On Wednesday, June 30,
Living in the Pacific Northwest and having just gone through a big bath of heat
I have become a temperature detective. Anything not being used should not be
radiating in the infrared spectrum above surroundings. Thus, all of my radios
are off.
Or, so I thought. I forgot that the KPA500 was
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