Hello Rick (NK7I) and Andy (K3WYC) - Tnx replies
"Message: 17
Date: Wed, 24 Apr 2024 14:11:28 +
From: Andy Durbin
To: "elecraft@mailman.qth.net"
Subject: [Elecraft] KPA-500 Failure
Message-ID:
<
dm4pr10mb6791e0db00b79830385f5cd28c...@dm4pr10mb6791.namprd1
"With the OPER light GREEN and slowly increasing the RF drive level to the amp,
there is a point where an internal relay 'click' can be heard, the 50-watt LED
on the top row of LEDs turns red and the FAULT light turns red."
All the KPA500 LED are single color. The 50 W LED is either lit green
It sounds like blown FETs. It may be time to ship it to CA where
any/all upgrades can be done as well as repair.
They're a little backed up, so it may take a few weeks. Parts and shop
time too of course.
Call the techs to discuss it and get an RSA and ask if they want you to
pull the
Greeting to everyone
I have read the KPA500 operator manual in hopes of solving my
issue and have found nothing that solves/fixes the problem.
This amplifier has been a workhorse for many years and today
after the KAT500 antenna tuner searched/found a 'match' for a new
antenna, I selected OPER
For Sale:
The KPA-100, 100 watt K2 option still in kit form. Has not been built. Parts
still in plastic bags. Original box.
Last price from Elecraft was $699. I am asking $700 to include US shipping.
Respond to ns6x.j...@gmail.com
72/73
John Kitchens, NS6X
Dear everyone,
This morning while I was running a CW net, using a VibroPlex Lightning bug,
my KPA 500 seemingly went on the Fritz. I was running it at 300 Watts, on
7.123 MHz, paired with my K3 using the smart cables, and it was working
perfectly until about 10 minutes into the net. Whereupon it
"My Winkeyer has settings for both lead and tail time, and so does N1MM+.
WSJT-X does not appear to have these variables."
WSJT-X has provision for changing the delay between assertion CAT PTT and onset
of audio (settings/advanced/miscellaneous). The delay between end of audio and
CAT PTT
My Winkeyer has settings for both lead and tail time, and so does
N1MM+. WSJT-X does not appear to have these variables.
73, Pete N4ZR
On 1/14/2024 11:04 AM, Lou Laderman wrote:
Pete, your issue may only be on the back end of the transmission, and
adjusting the delay time for the exciter to
Pete, have you tried increasing the transmit delay between your exciter and the
amp? If the exciter continues to transmit briefly after the amp’s relay kicks
out, you could see an swr spike.
73, Lou W0FK
Lou Laderman
Sent from my iPad
> On Jan 13, 2024, at 10:50 AM, Pete Smith N4ZR wrote:
>
I don't have the same equipment as you but I experienced a very similar problem
that I initially thought was caused by a problem with my KPA500.However,
when I looked at the output of my TS-590S with a scope and spectrum analyzer,
I found that it was emitting out of band spurii at the end
I've been operating 160M FT8 recently, and am noticing some odd symptoms
from my amp that seem only to occur in FT8 mode. Even running only
about 1170 watts into a good dummy load, with the KPA-1500's ATU
bypassed and a displayed SWR of 1.0:1 during transmit, as soon as the
transmission ends
Bingo. Into my Cantenna no problem all the way up to 1500W. I also
noticed during the antenna tests that my amp heated up very rapidly to
levels not seen before (over 70C). I had expected lower efficiency on
160, so I'll need to watch it. I was temporarily driving my Carolina
Windom, and
Sent: Friday, November 17, 2023 8:54:10 PM
To: Pete Smith N4ZR
Cc: Elecraft List
Subject: Re: [Elecraft] KPA-1500 on 160
The fault table should show what threshold is being exceeded. Recent 160 meter
soft fault detail would be of interest.
73 de Dick, K6KR
> On Nov 17, 2023, at 19:51, P
The fault table should show what threshold is being exceeded. Recent 160 meter
soft fault detail would be of interest.
73 de Dick, K6KR
> On Nov 17, 2023, at 19:51, Pete Smith N4ZR wrote:
>
> I have just tried my K-3/KPA-1500 combo on 160. I find that I can only
> increase the drive to 26
I have just tried my K-3/KPA-1500 combo on 160. I find that I can only
increase the drive to 26 watts, to deliver about 880 watts input before
the OVR light comes on. Is this to be expected? Don't see anything in
the manual about it.
--
73, Pete N4ZR
Also, many people forget that the KAT500 works on RX as well as TX and provides
a band-pass filter which changes position across tuning segments.
If you’re using the KAT500 without the Aux cable and the main TX antenna for
RX, as soon as you tune the RX away from the current tuned segment, the
I have a KPA-1500, and followed the manual's instruction to run an Aux
cable between my K-3's ACC jack (on the KIO3B) and the KPA-1500. I
prefer to have the band changing already accomplished before I go key
down, even for just a dit.
73, Pete N4ZR
On 11/13/2023 7:14 PM, Jim Brown wrote:
I
I have cables that control the amplifier for each radio.
By default, the KPA500, KPA1500, and KAT500 all have near-instantaneous
frequency-detection. They switch very quickly to the right band, and the
tuners will recall previous antenna tunings for the detected frequency.
All it takes is a
Doug,
You will have to use a switch that changes all 15 conductors. VGA
switches may not implement all conductors and worse yet, some may be
connected together to common (ground).
73,
Don W3FPR
On 11/13/2023 3:18 PM, Doug Millar via Elecraft wrote:
I am trying to use my K3 and a Yaesu
I am trying to use my K3 and a Yaesu FTDX10 with my KPA 500. I have cables
that control the amplifier for each radio. What can I use for a switch box to
switch the cables into the amp? A VGA switch did not work. Doug K6JEY
__
Anyone have an interest for subject cable UNUSED in original packaging?
Contact OFF list.
Mike AC5P
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Post:
I have an unused new elecraft cable for a Yaesu to KPA-1500 to practically
give away. I no longer own a Yaesu rig so the cable is available for a mere
$10 plus shipping.
If anyone is interested in SO2R operation and has some RF interference on
40 from another band while using the second radio, I
Dave;
Do you get the Operate message on the K3 display before the band change?
Might the K3 be transmitting when you hit the OPER button on the KPA?
Use the KPA Utility to get a fast log file and send it my way. I am very
interested in seeing the KPA’s current settings. I’m really puzzled at
K3 – KAT500 – KPA500 setup using AUX cables (2) to interconnect. All 3 devices
seem to be talking to each other just fine but when I go from STBY to OPER on
the amp, it changes bands and changes the band on the K3. It most often goes to
28Mhz but not every time. I checked both cables for
On Behalf Of dave ingebright
Sent: Tuesday, December 13, 2022 9:47 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA 500: No Output
Hello-- I have a 3 yr old KPA500 that has just exhibited it's first problem.
No amplification! I am remote controlling it via the remote client over the
int
If you have a camera pointing at the amp, look for the "*" when you key
down...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 12/13/22 07:47, dave ingebright wrote:
Hello-- I
Hello-- I have a 3 yr old KPA500 that has just exhibited it's first problem. No
amplification! I am remote controlling it via the remote client over the
internet from 2000 miles away. Nothing has changed in the remote shack and no
wiring has been disturbed. There is no output from the KPA on
@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 timing settings IC-7300
On 7/27/2022 12:08 PM, Lyn Norstad wrote:
> CW Rise Time set to the default, 4ms (range 2ms - 8ms).
This is MUCH too fast, very clicky. Even the slowest is much too clicky.
See my analysis of ARRL Lab Test results d
, WØLEN
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown
Sent: Thursday, July 28, 2022 2:55 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 timing settings IC-7300
On 7/27/2022 12:08 PM, Lyn Norstad
On 7/27/2022 12:08 PM, Lyn Norstad wrote:
CW Rise Time set to the default, 4ms (range 2ms - 8ms).
This is MUCH too fast, very clicky. Even the slowest is much too clicky.
See my analysis of ARRL Lab Test results done in 2014. This is all THEIR
data, that they sent me in electronic form.
-boun...@mailman.qth.net] On Behalf Of Tom N4LSJ
> Sent: Tuesday, July 26, 2022 8:39 PM
> To: Elecraft@mailman.qth.net
> Subject: [Elecraft] KPA-500 timing settings IC-7300
>
> I've been on the internet and can find IC-7300 TX Delay, CW Rise Time
> settings for other amplifiers pretty
-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Tom N4LSJ
Sent: Tuesday, July 26, 2022 8:39 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KPA-500 timing settings IC-7300
I've been on the internet and can find IC-7300 TX Delay, CW Rise Time
t5he ic7300 does have an RF tail, which has recently been discussed in the
ic7300 group on groups.io
extract from there:
Hello Adam,
As you requested, I have updated the page with the new 'scope trace.
http://wb6bbb.com/Icom_IC-7300/index.html
The entire
The KPA500 is a QSK amplifier. It switches from RX to TX very rapidly (about 2
mSec) in order to allow QSK operation of the station.
The TRTime parameter sets the time the KPA takes to transition from TX to RX -
this is specifically for transmitters that may continue to output RF for a
short
I've been on the internet and can find IC-7300 TX Delay, CW Rise Time
settings for other amplifiers pretty easily. There don't appear to be
any for -specifically- the IC-7300 and KPA-500. Are there "officially
sanctioned" settings for that combination? I feel it may be overkill to
use 30ms
I had to add a soft-start relay to my Astron RS-70A power supply to keep
it from popping a 16a breaker when using it on 50 Hz. But otherwise it
works fine with the transformer wired for 240v.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On
and, though not always well known, ferrite cores in transformers for
feeding antennas can also saturate with excess RF power. The resulting
RF din can be discouraging to neighbor hams and folks watching TV.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
Josh Fiden wrote on 7/6/2022
Transformer core can saturate if line frequency is too low. Except I’d be
certain KPA-500 uses the same transformer for export to 50Hz countries so your
variations are fine.
Many years ago when I was young & dumb discovered this the hard way. Customers
would take products with 120v/60Hz line
Greetings everyone
I hesitate to use my KPA-500 here at this CN98pi QTH. LIne frequency here
varies daily between 58.xx-to-61.yy Hz and line voltages vary between
110-to-130VAC due to the limitations of the governor controlling the
communities 200KW hydro system (Chelan County PUD remote
Yesterday, I finally took the cover off my KPA-1500 power supply, which
has been sitting on the carpet behind my desk for 2 1/2 years. I have a
shedding dog and am not particularly fastidious, so I was worried about
diminished cooling. I needn't have worried - the interior of the supply
With all the various pieces of information in this discussion, let’s answer
things correctly. First, is hardwired cabling needed?
The answer is no, it is definitely not. The KPA500 always counts the RF
frequency and will switch to the counted band if
it does not agree with whatever else it sees.
d KPA500s and a KPA1500 I have yet to touch them. To each his own.
>
> Ken K6MR
>
>
> From: elecraft-boun...@mailman.qth.net on
> behalf of Andy Durbin
> Sent: Wednesday, March 23, 2022 1:18 PM
> To: elecraft@mailman.qth.net
> Subject: [El
, March 23, 2022 4:26 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA 500
Hmm. I used to joke that I bought a KPA500 just so I could switch bands on my
K3 without accidentally changing the VOX setting.
N7WS
On 3/23/2022 1:58 PM, Ken K6MR wrote:
> "They are a "bandaid&
Hmm. I used to joke that I bought a KPA500 just so I could switch bands on my
K3 without accidentally changing the VOX setting.
N7WS
On 3/23/2022 1:58 PM, Ken K6MR wrote:
"They are a "bandaid" for the lack of band buttons on the K3."
I've always considered "band buttons" on any radio to
m. To each his own.
Ken K6MR
From: elecraft-boun...@mailman.qth.net on
behalf of Andy Durbin
Sent: Wednesday, March 23, 2022 1:18 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA 500
"It’s also worth mentioning that if the radio and the amp are hard wired
together,
"It’s also worth mentioning that if the radio and the amp are hard wired
together, changing the band using the buttons on the front of the amp
automatically changes the band on the radio."
It should be possible to disable the KPA 500 band buttons but it isn't. They
are a "bandaid" for the
It’s also worth mentioning that if the radio and the amp are hard wired
together, changing the band using the buttons on the front of the amp
automatically changes the band on the radio.
Richard
W4KBX
> With the band switching cable between the radio and amp, the amp follows the
> receiver
KPA500. Sure is a
sweet and reliable system. Hard to screw up anything.
73
Bob, K4TAX
On 3/23/2022 2:14 PM, elecraft-requ...@mailman.qth.net wrote:
Message: 6
Date: Tue, 22 Mar 2022 10:24:59 +0100
From: F5vjc
To: Elecraft Reflector
Subject: [Elecraft] KPA 500
Message-ID:
Content
Although I have a K3 and a K3S, they are relegated to backup service to my
Kenwood TS-890.
A number of us Kenwood users also have KPA500 and KAT500s. We are using mostly
home-built cables for interconnection. If you don't have the KAT500 then RF
sensing is probably good enough. The
A long time ago I used a KPA500 with a Yaesu FT1000MP and the RF sensing
worked perfectly. Perhaps if you have a KAT500 and are using different
antenna ports or have very out of tune antennas there may be an advantage to
having cable control but otherwise I would not worry about it.
John KK9A
On 3/22/2022 2:24 AM, F5vjc wrote:
What is the advantage of using a band switching cable between the
transceiver and the KPA500 over just relying on the RF sensing function?
I've never used one. A tap on the mic or a dit is all that is needed.
73, Jim K9YC
On 2022-03-22 02:24, F5vjc wrote:
What is the advantage of using a band switching cable between the
transceiver and the KPA500 over just relying on the RF sensing
function?
Do you trust that RF sensing function? REALLY trust it? Because if you
transmit
into the wrong LPF, it can be Game
What is the advantage of using a band switching cable between the
transceiver and the KPA500 over just relying on the RF sensing function?
I want to drive my KPA500 from an FTDX 101D, is a cable the better way to
go?
73 F5VJC
__
I operated my KPA1500 at 200 watts on 30M without any problems (cw,
FT8/RTTY/psk). ICOM-7610 is driving the KPA1500
My normal power was about 500 watts (or less) with a few ventures to 700 watts
as I found that my Ameritron remote coax
switch did not like real high power.
Unfortunately, my
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Hi Guys,
Wondering if anyone has measured or experienced distortion on a KPA-1500 when
operated at low power, such as: 200, 400 or 800 watts? I ask because sometimes
I need more than 100 watts to make a Qso but sometimes it's fun to run the
minimum power required to complete the Qso. That
Yes, I leave my Power Supply on all the time. I just keep an eye on the
dust factor.
--
*73 De Mike*
*VE3YF
_/http://www.ve3yf.com/_*
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Help:
Yep. And I keep the K3 on all the time.N2TK, Tony
-Original Message-
From: Larry Boekeloo
To: elecraft@mailman.qth.net
Sent: Mon, Jan 3, 2022 11:30 am
Subject: [Elecraft] KPA-1500 Power Supply
Do most of you leave your KPA-1500 Power Supply powered up all the time
even with the RF Deck
On 1/3/2022 8:30 AM, Larry Boekeloo wrote:
Do most of you leave your KPA-1500 Power Supply powered up all the time
even with the RF Deck off?
Yes
73, Jim K9YC
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Home:
Yes.
On Mon, Jan 3, 2022 at 8:30 AM Larry Boekeloo wrote:
> Do most of you leave your KPA-1500 Power Supply powered up all the time
> even with the RF Deck off?
>
> Thanks.
>
> Larry, KN8N
> Kalamazoo, Michigan
> __
> Elecraft mailing
Same here. I’m too old to continue reaching under the bench to turn it off .
73,
Bill WE5P
Comfortably Numb
> On Jan 3, 2022, at 11:45, Charles K0MV wrote:
>
> Mine is powered all the time, but the RF deck is not.
>
>
>> On 1/3/22 9:30 AM, Larry Boekeloo wrote:
>> Do most of you leave
Mine is powered all the time, but the RF deck is not.
On 1/3/22 9:30 AM, Larry Boekeloo wrote:
Do most of you leave your KPA-1500 Power Supply powered up all the time
even with the RF Deck off?
Thanks.
Larry, KN8N
Kalamazoo, Michigan
Do most of you leave your KPA-1500 Power Supply powered up all the time
even with the RF Deck off?
Thanks.
Larry, KN8N
Kalamazoo, Michigan
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Dear OMs and YL,
Can someone please tell me what the % sign with Status message of say
67% indicates. I think it is the efficiency of the amplifier at a given
point.The same Status screen displays: forward power, Voltage, Current
and temperature as well as the % figure. I looked
I don't know if this is useful, but I have noticed that my KXPA100 with
ATU takes a few seconds to ramp up, or at least to light all the LED's
up to 100W. This happens only on the first transmit after sitting
awhile and I just assumed that it takes a few seconds for the coils,
etc. to warm
: "David Hachadorian"
To: "k4mwb", "Reflector Elecraft"
Cc:
Sent: Saturday December 11 2021 10:29:48AM
Subject: Re: [Elecraft] KPA-1500 tuner power ramp up
I don't know anything about the KPA-1500, but I have seen similar
power ramping if I have K3/config/TX DLY set
I don't know anything about the KPA-1500, but I have seen similar power
ramping if I have K3/config/TX DLY set too short for my AL-1500 amps.
With that amp, I have to set TX DLY to 14 msec. What happens is that
the K3 sees a momentary high swr before the amp relay closes, and
throttles back
When using the tuner only (amp on standby), ATU tune works fine, but
observing the PWR it ramps up slowly from 0 watts. For example K3 set
to 100 watts, amp on standby, press ATU tune and it takes about 15
seconds for the amp PWR indicator to reach 100 watts. Is this normal?
There is no noise from
My new-to-me KPA-1500 arrived today. I had to change out my 220 wall plug
to accommodate the amp. It's up and running and already interfaced with my
K3.
Wow...what a piece of gear!
Larry, KN8N
Kalamazoo, Michigan
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The unit was sold.
AD2F
John
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Unit was sold
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Do you have a price in mind?
On Tue, Oct 19, 2021, 16:47 John Pierce via Elecraft <
elecraft@mailman.qth.net> wrote:
> Excellent Condition, light usage.
>
>
>
> AD2F
>
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> Home:
Excellent Condition, light usage.
AD2F
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This list hosted by:
Looks like KPA-1500 #167 needs service. Anyone know what "FAULT: Low Gain
Ratio 2" means? Perhaps a LDMOS kicked the bucket? 73, Dick- K9OM
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Dick, during such episodes, what is the SWR meter on the amp reading?
Could amp be on the verge of protecting itself?
Roy K6XK
Hi Guys,
My KPA-1500 is having an issue: with the internal ATU tuned "OFF" or in "ByPass" mode, when
transmitting the KPA-1500's relays occassionally chatter
Hi Guys,
My KPA-1500 is having an issue: with the internal ATU tuned "OFF" or in
"ByPass" mode, when transmitting the KPA-1500's relays occassionally chatter
like a machine gun while transmitting. It sounds just like the relays do when
the ATU is turned "ON" and it's tuning an antenna for
I have my KPA500 for sale. My location is NJ
John, AD2F
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Local buyer (SETX) preferred:
https://ae5x.blogspot.com/2021/09/elecraft-kpa-500-for-sale-local-buyer.html
73,
John AE5X
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I don't know the KPA1500 but KAT500 power is limited as a function of the
Bypass SWR for the active antenna and tuned frequency. The higher the bypass
SWR the lower the allowed power with tuner active.
Andy, k3wyc
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I have noticed on the bottom of the display an indication of the ATU power
limit which is different for every band. How is this value calculated?
Howard
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Well, at the risk of offending Fred ...
A PIN diode has an intrinsic (I) region between the P and N junctions.
The I region is almost completely undoped and therefore the carrier
lifetimes are long relative to the frequency of the signal being
switched. A PIN diode is turned on with
On 2021-08-26 15:19, David Gilbert wrote:
Pedantic? If those were truly PIN diodes like you called them the
270v bias wouldn't have been used there.
Actually, I'm finding this interesting. So with real PIN diodes, you
don't have
to strongly bias them off?
The HV is obtained in various
Pedantic? If those were truly PIN diodes like you called them the 270v
bias wouldn't have been used there.
Dave AB7E
On 8/26/2021 2:56 PM, Fred Jensen wrote:
This morphed into a pedantic discussion of solid state diodes.
Chuck's original question was about the 270 V error. I'm fairly
This morphed into a pedantic discussion of solid state diodes. Chuck's
original question was about the 270 V error. I'm fairly sure the only
purpose for the 270 V in a KPA500 is bias for the T-R switch. He asked
for suggestions. The T-R switch and the source for the 270 V might be a
good
High voltage rectifier diodes would have very low doped N-regions, which
means fairly long carrier lifetimes so no doubt they work somewhat like
a PIN diode if properly biased. But they aren't really the same thing,
and I still say that a PIN diode has performance advantages in many
Using 1N4007's and 1N5208's ( I could have the last # wrong ) as "Poor
Man PIN
diodes" is pretty established practice in the amateur community. Look
up
W6JL on QRZ.com. He has an extensive article about it on his page
there.
Also Hans Summers of qrp-labs uses them in his 50W QSK amplifier.
My schematic shows TR Switch diode type is S1M. Datasheet easily found on-line.
I doubt this has any influence of 270 V failure.
Andy, k3wyc
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That sounds odd to me. True PIN diodes are current actuated devices.
The carrier lifetimes are long enough that the devices are "on" even if
the signal peaks exceed the voltage of the control current ... as long,
of course, as the control current exceeds the signal current.
On the other
I think the 270 V circuit is DC bias for the PIN diodes in the TR-switch.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 8/26/2021 10:32 AM, Chuck Chandler wrote:
My KPA-500 has been running great for several years. Recently I noticed it
was making the occasional extra "click" or
Well if it were mine I'd check the voltage on the nominal 270 V connector on
the PA module then work back from there.
I keep notes from discussion of other peoples problems and their resolution.
You can find all this in the archive but this is what I have in my notes for
KPA 270 V problems:
My KPA-500 has been running great for several years. Recently I noticed it
was making the occasional extra "click" or "thunk" upon powering up or
down. Usually it would "click" when powered up and again when powered
down, but recently a few seconds after the first click there would be
another
There was a post to this maillist over a year ago which said
that the most frequent casualty of lightning strikes in the K3S
was the USB chip and associated circuitry. The recommended "fix"
was to unplug the USB cable from the back of the radio when it
was not in use.
Applying this fix to a
On 7/10/2021 12:59 PM, Bob McGraw wrote:
Sure, power strips are inexpensive. But they really only protect
against one type of power surge. If the voltage spikes, the breaker
should trip. However, this isn’t always instantaneous. Delicate devices
can still be damaged, and many other types
1
Date: Sat, 10 Jul 2021 11:30:18 -0700
From: Jim Brown
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-1500 issue (power surge?)
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed
On 7/10/2021 3:55 AM, Jim Cary wrote:
I posted a note yesterday that I took a power
Do you have it disabled?
73,
Bill WE5P
Comfortably Numb
> On Jul 10, 2021, at 14:42, Hunsdon Cary III wrote:
>
> I have #380 and yesterday, for the first time, tried to use the 2nd antenna
> port but it’s not available and a check of my manual says “for future use”.
> Has a subsequent
I have #380 and yesterday, for the first time, tried to use the 2nd antenna
port but it’s not available and a check of my manual says “for future use”.
Has a subsequent firmware update added access to the 2nd antenna port?
73,
Cary
K4TM
Lynchburg VA
Sent from Clovelly Cottage II, home of
On 7/10/2021 3:55 AM, Jim Cary wrote:
I posted a note yesterday that I took a power surge
That's probably because some part of your station was getting power from
a circuit that had an MOV "surge protector" in it, and your station was
not properly bonded. Study N0AX's ARRL book on the topic,
I posted a note yesterday that I took a power surge which knocked out my PC and
couldn’t connect to my K3S. Thanks to all the input for you guys, it would
appear that the IO board on the K3S got fried. Still to be confirmed, but
strongly suspect true.
I figured I better check out the
Given the starting point is the ambient temp in your shack, what
temperatures are you observing on your KPA-1500 when operating FT8?
Another way of saying this is how many degrees above the ambient while tx
on FT8?
--
*Mac Gray-W8LMG *
See page 14, paragraph 1. for the confirmation of why the left rear
corner is warm.
73
Bob, K4TAX
On 6/30/2021 7:12 PM, elecraft-requ...@mailman.qth.net wrote:
Message: 2
Date: Wed, 30 Jun 2021 09:08:41 -0700
From: Phil Hystad
To: Ken Winterling
Cc: Elecraft Reflector
Subject: Re:
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