Re: [Elecraft] KPA1500 Power Supply Fan Noise

[Steve]

As Dave mentioned the LED board is in the power supply. Take off the cover of 
the power supply and the LED board is small board located on front left side as 
you look at the amp from the rear. It’s held in place by two small screws. The 
resistor to change is located bottom of the board as your looking at it from 
the rear of the amp. The resistor needs to stand off the board a couple of mm. 

Your question regarding the SN when this change occurred is a good one. I don’t 
know the answer. My amp was one of the first with a very low SN. 73

> On Jun 27, 2020, at 6:43 PM, Dave  wrote:
> 
> It is the LED board in the PS.
> 
> Dave wo2x
> 
> Sent from my iPad
> 
>> On Jun 27, 2020, at 7:55 PM, ex...@comcast.net wrote:
>> 
>> Hi Steve,
>> 
>> Thanks for the update.
>> 
>> So, this is the LED board on the amp, not the power supply? Guess we don't
>> know at what serial number the change was made?
>> 
>> Mike
>> K7PI
>> 
>> 
>> -Original Message-
>> From: elecraft-boun...@mailman.qth.net  On
>> Behalf Of STEPHEN R ZUMBRUN
>> Sent: Saturday, June 27, 2020 16:39
>> To: elecraft@mailman.qth.net
>> Subject: [Elecraft] KPA1500 Power Supply Fan Noise
>> 
>> Hello, all and Happy Field Day. Say I just wanted to comment about Elecraft
>> service and the help they provided me to make a mod to my KPA1500. My
>> KPA1500 power supply fan was rather noisy. I had seen discussion on the
>> reflector about this so I contacted Doug at Elecraft service. He ask if I
>> could solder.  I informed him I could and he sent me a new 22 ohm, 3 watt
>> resistor and i swapped it out with the 10 ohm, 3 watt resistor on the LED
>> board of the power supply. I am much pleased with the sound of the power
>> supply fan now after the modification. My amp is an early serial number and
>> the new amps come with the 22 ohm resistor on the LED board. So...if your
>> power supply is a bit noisy you might consider this mod and contact Doug at
>> Elecraft Service. The Elecraft part number of the resistor is E500128. 73,
>> Steve W0SZ.
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Re: [Elecraft] Requesting help with computer issue -

[Ken Barnett]

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[Elecraft] [K3] S/N 45## low power out and ATU not tuning properly?

[Nr4c]

This started several years ago at a FD. Brought home and worked perfectly.  
took to another outdoor event and same thing. Works at home not at events. 

Pulled KPA3 out and applied Deoxit and worked connectors in/out several times 
and replaced KPA3. Worked well thru two FDs and number of other events.  And as 
main radio after selling my K3S last summer ($ for K4D). Took down and packed 
it up for FD about 6 weeks ago and replaced it with an IC-7300 till the K4 
arrives. 

This AM it started again at FD!  

Could this be an LPA issue instead of the KPA3 issue?  Can’t remember if my 
KPA3 has gold pins or not. 

Help!

Sent from my iPhone
...nr4c. Bill 

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[Elecraft] DATA A not available on 20 & 15 PSK31

[John McBride]

Thanks for the responses which have been received. When following the 
directions to set DATA A on  20 and 15 meters, I do a 1/2 second hold on AFX - 
DATA MD and N/A is displayed. When adjusting the VFO B the display then is the 
same as the quick tap on the AFX - DATA MD, that is date, time, etc. Do you 
have any thoughts as to why this is not working (because it does work for 40 
meters)?

John McBride N0UQC
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Re: [Elecraft] DATA A not available on 20 & 15 PSK31

[Nr4c]

It takes more than a 1/2 sec hold. A full 1-2 sec works better. 

You’re getting the error of trying to go DPLIT when one ZvFO is not on sane 
Data mode.   Do the double-tap on A>B. 

Sent from my iPhone
...nr4c. bill


> On Jun 28, 2020, at 8:31 AM, John McBride  wrote:
> 
> Thanks for the responses which have been received. When following the 
> directions to set DATA A on  20 and 15 meters, I do a 1/2 second hold on AFX 
> - DATA MD and N/A is displayed. When adjusting the VFO B the display then is 
> the same as the quick tap on the AFX - DATA MD, that is date, time, etc. Do 
> you have any thoughts as to why this is not working (because it does work for 
> 40 meters)?
> 
> John McBride N0UQC
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Re: [Elecraft] [K3] S/N 45## low power out and ATU not tuning properly?

[Nr4c]

No. At field it’s batteries. At home an Astron 35m linear or any or several 
switchers. 

The field setup may be one or two AGM batteries. Nominal voltage 12-12.8 volts. 
 At home it’s 14.1.

Sent from my iPhone
...nr4c. bill


> On Jun 28, 2020, at 10:06 AM, rich hurd WC3T  wrote:
> 
> 
> Same power source?
> 
>> On Sun, Jun 28, 2020 at 08:20 Nr4c  wrote:
>> This started several years ago at a FD. Brought home and worked perfectly.  
>> took to another outdoor event and same thing. Works at home not at events. 
>> 
>> Pulled KPA3 out and applied Deoxit and worked connectors in/out several 
>> times and replaced KPA3. Worked well thru two FDs and number of other 
>> events.  And as main radio after selling my K3S last summer ($ for K4D). 
>> Took down and packed it up for FD about 6 weeks ago and replaced it with an 
>> IC-7300 till the K4 arrives. 
>> 
>> This AM it started again at FD!  
>> 
>> Could this be an LPA issue instead of the KPA3 issue?  Can’t remember if my 
>> KPA3 has gold pins or not. 
>> 
>> Help!
>> 
>> Sent from my iPhone
>> ...nr4c. Bill 
>> 
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> -- 
> 72,
> Rich Hurd / WC3T / DMR: 3142737  
> Northampton County RACES, EPA-ARRL Public Information Officer for Scouting
> Latitude: 40.761621 Longitude: -75.288988  (40°45.68' N 75°17.33' W) Grid: 
> FN20is
> 
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Re: [Elecraft] DATA A not available on 20 & 15 PSK31

[John McBride]

Thanks! the A/B switch was the answer. Knew it had to be a simple fix but 
needed someone to give me the answer.

John N0UQC

From: Nr4c 
Sent: Sunday, June 28, 2020 6:48 AM
To: John McBride 
Cc: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] DATA A not available on 20 & 15 PSK31

It takes more than a 1/2 sec hold. A full 1-2 sec works better.

You’re getting the error of trying to go DPLIT when one ZvFO is not on sane 
Data mode.   Do the double-tap on A>B.

Sent from my iPhone
...nr4c. bill


> On Jun 28, 2020, at 8:31 AM, John McBride  wrote:
>
> Thanks for the responses which have been received. When following the 
> directions to set DATA A on  20 and 15 meters, I do a 1/2 second hold on AFX 
> - DATA MD and N/A is displayed. When adjusting the VFO B the display then is 
> the same as the quick tap on the AFX - DATA MD, that is date, time, etc. Do 
> you have any thoughts as to why this is not working (because it does work for 
> 40 meters)?
>
> John McBride N0UQC
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Re: [Elecraft] K4 on Digital Modes

[Joe DeVincentis]

This brings up a question about FSK.  If I read this correctly, we will be
able to generate FSK by toggling RTS/DTR).  Personally, I find the jitter in
Windows to be unacceptable using this method.  Windows is no where real time
having any sort of guarantee.  That's why I use an external FSK keyer on my
K3s.  

What I was wondering is if the K4 will be able to accept an ASCII string and
do the FSK keying (ala a TinyFSK module)?

73,
Joe, KO8V

-Original Message-
From: elecraft-boun...@mailman.qth.net  On
Behalf Of Bob Wilson, N6TV
Sent: Saturday, June 27, 2020 12:36
To: Elecraft Reflector 
Subject: Re: [Elecraft] K4 on Digital Modes

On Sat, Jun 27, 2020 at 8:14 AM Gus Holcomb  wrote:

> With the K4D, for instance, what interfaces are presented on the 
> computer and how many of them are there?


To review, on a K3S or K3+KIO3B with USB connector, you get one virtual
serial port and one USB Sound Card (USB AUDIO CODEC).  Windows cannot
separately set the record level of the left/right audio channels of the K3S
sound card.

With the K4 USB connector you get *two* virtual serial ports on the USB
(similar to IC-7610) and a new USB Sound Card that Windows recognizes as
"LINE" instead of "MIC", so you can set the left/right recording levels
separately, if needed for critical SO2V RTTY Contesting.  The second serial
port is ideal for computer-generated CW, FSK or PTT keying (via RTS/DTR
pins) for programs like N3FJP (and HRD?) that cannot do both CW keying and
rig control on the same serial port, or programs like MMTTY that need a
dedicated serial port for FSK keying.  Port sharing software not needed.
An FSK keying circuit on the K3 ACC connector is no longer needed (but is
still supported).

There's also a separate and independent female DE-9 RS232 connector ideal
for connecting non-Elecraft amplifier "CAT" cables or SteppIR controllers.
This port operates independently of the USB serial ports so no special
Y-Cables needed, and it can use a different baud rate; the device is allowed
to poll the K4 at the same time that a logging program is polling the radio
on a different port (not possible on K3 or K3S).

Will all over them be accessed over ethernet or can you also use USB?


Ethernet can be used too, but it is optional.


> What software will you need to run on your computer?


Same as you would for K3, with enhancements developed over time to take
advantage of K4's extra capability, such as FSK keying over serial port.

Can you run multiple copies of a wsjt-x and monitor different
> bands/frequencies simultaneously?


Monitoring two bands will be possible with a K4D model if a Sub Receiver is
enabled.  However, we'll have to tell the second instance of WSJT-X to read
"VFO B" instead of "VFO A" to display the SubRx frequency, and transmitting
one both would require constantly switching between "SPLIT ON" and "SPLIT
OFF".  Of course, while one VFO is transmitting the other won't be able to
receive since all receivers are muted during transmit.


> Will you be able to transmit on each of those bands seamlessly?


Not sure what you mean by seamlessly.  It's treated as one radio with two
VFOs, and you can transmit on VFO A if SPLIT is OFF, or transmit on VFO B if
SPLIT is ON.


> With the K4D each having a receiver and a sub-receiver can you monitor 
> 4 bands or just 2?
>

Two bands.  There are only two audio output channels, not four.

73,
Bob, N6TV
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[Elecraft] Sharing

[Bill Wiehe via Elecraft]

Hi Madelyn,
I have a quick question,   I was waiting,  saving up, to upgrade my K3 with the 
KIO3BUpkt-KIO3Bkit. However, now I see the kit is unavailable. Are there any 
plans to make anymore of these kits onceyou are all back to full operation?
Thank you, Bill-W0BBI 
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[Elecraft] K2 K2/100 post FD review

[NJMike]

I was able to finish my KPA100 a few days ago, just in time for Field Day. 

The amp worked flawlessly!  No error messages, over heating, etc. made 451
contacts on CW and phone with no bad reports. 

I am extremely pleased and wish to thank the Elecraft team for developing
such a great kit!

I did notice a variation on the power output on different bands:

80m - 100w
40m - 100w
20m - 80w
15m - 50w
10m - 30w

SWR was never above 1.3-1. 

Does that sound normal?

Thanks again!
Mike NJ2OM



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Re: [Elecraft] K2 K2/100 post FD review

[Don Wilhelm]

Mike,

Congratulations on finishing the K2/100.

On the power output variation, that is not normal.
First check the voltage delivered to the K2 while in transmit.
You should do that by tapping DISPLAY and scrolling to the voltage 
display.  Your power source should provide at least 13.8 volts, but 
higher (up to 15 volts) is better.  If the voltage shown by the K2 
display during transmit is less than 12.6, make certain all power cable 
connections are tight.


If the power supply voltage is not the problem, then remove the KPA100 
from the base K2 and realign the bandpass filters.  Connect a dummy load 
to the base K2 BNC ANT jack.  After that, check the maximum power from 
the base K2 - you should have at least 10 watts on each band.  Record 
the power for each band.


Using a dummy load takes away any question about your antennas.  Always 
check into a dummy load - with an in-line wattmeter if necessary.


The other possibility is that you have a problem in the Low Pass Filter 
in the KPA100.  To check for that, re-install the KPA100, but power the 
base K2 from the coaxial power jack (no power to the KPA100 - connect 
the dummy load to the SO2339 jack on the KPA100.
Again check the maximum power on each band from the base K2.  It should 
be no more than 5% less than you found with the base K2 only.
If there is a substantial difference in power, then check the KPA100 Low 
Pass Filter - particularly checking the number of turns on the toroids.


73,
Don W3FPR


On 6/28/2020 4:04 PM, NJMike wrote:


I did notice a variation on the power output on different bands:

80m - 100w
40m - 100w
20m - 80w
15m - 50w
10m - 30w

SWR was never above 1.3-1.

Does that sound normal?


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Re: [Elecraft] Requesting help with computer issue -

[Lynn W. Taylor, WB6UUT]

I fought for a very long time, and finally gave up on Windows and 
shifted to Linux Mint Cinnamon.


One of my mentors calls Linux the OS of last resort, and I agree, 
Microsoft finally pushed me that far.


The Cinnamon desktop is more windows-like than Windows 10.

73 -- Lynn

On 6/27/20 8:29 PM, Phil Kane wrote:

On 6/27/2020 7:27 PM, Dauer, Edward wrote:


Why it should need that after having worked flawlessly for a couple
of years is beyond me – unless Windows’ latest update messed it up.
I choose to blame that.


I have to do that every so often with my laptop that I use only for ham
radio stuff - W10 has a will of its own, it seems.

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

 From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Re: [Elecraft] K2 K2/100 post FD review

[Mike Kopacki]

Well, that gives me something to do!  I’ll let you know how it goes. 

Thanks,
Mike NJ2OM 

> On Jun 28, 2020, at 4:41 PM, Don Wilhelm  wrote:
> 
> Mike,
> 
> Congratulations on finishing the K2/100.
> 
> On the power output variation, that is not normal.
> First check the voltage delivered to the K2 while in transmit.
> You should do that by tapping DISPLAY and scrolling to the voltage display.  
> Your power source should provide at least 13.8 volts, but higher (up to 15 
> volts) is better.  If the voltage shown by the K2 display during transmit is 
> less than 12.6, make certain all power cable connections are tight.
> 
> If the power supply voltage is not the problem, then remove the KPA100 from 
> the base K2 and realign the bandpass filters.  Connect a dummy load to the 
> base K2 BNC ANT jack.  After that, check the maximum power from the base K2 - 
> you should have at least 10 watts on each band.  Record the power for each 
> band.
> 
> Using a dummy load takes away any question about your antennas.  Always check 
> into a dummy load - with an in-line wattmeter if necessary.
> 
> The other possibility is that you have a problem in the Low Pass Filter in 
> the KPA100.  To check for that, re-install the KPA100, but power the base K2 
> from the coaxial power jack (no power to the KPA100 - connect the dummy load 
> to the SO2339 jack on the KPA100.
> Again check the maximum power on each band from the base K2.  It should be no 
> more than 5% less than you found with the base K2 only.
> If there is a substantial difference in power, then check the KPA100 Low Pass 
> Filter - particularly checking the number of turns on the toroids.
> 
> 73,
> Don W3FPR
> 
> 
>> On 6/28/2020 4:04 PM, NJMike wrote:
>> I did notice a variation on the power output on different bands:
>> 80m - 100w
>> 40m - 100w
>> 20m - 80w
>> 15m - 50w
>> 10m - 30w
>> SWR was never above 1.3-1.
>> Does that sound normal?
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Re: [Elecraft] KX2 power cable polarity?

[Bill Frantz]

My .sig at the bottom says it all. 73 Bill AE6JV

On 6/27/20 at 6:48 PM, k2...@kanafi.org (Phil Kane) wrote:

> Unfortunately I have found two standards for
> "zip cord" markings - white stripe on positive, and white stripe on
> negative.  Your multi-meter is your friend.

---
Bill Frantz|The nice thing about standards| Periwinkle
(408)348-7900  |is there are so many to choose| 150 Rivermead Rd #235
www.pwpconsult.com |from.   - Andrew Tanenbaum| Peterborough, NH 03458

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Re: [Elecraft] K4 on Digital Modes

[Bill Frantz]

The K3 will accept a command through the CAT interface to send 
CW/RTTY/PSK. The K4 should as well.


73 Bill AE6JV

On 6/28/20 at 12:49 PM, j...@ko8v.net (Joe DeVincentis) wrote:


What I was wondering is if the K4 will be able to accept an ASCII string and
do the FSK keying (ala a TinyFSK module)?


---
Bill Frantz|"Web security is like medicine - trying to 
do good for

408-348-7900   |an evolved body of kludges" - Mark Miller
www.pwpconsult.com |

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Re: [Elecraft] Requesting help with computer issue -

[Phil Kane]

On 6/28/2020 1:48 PM, Lynn W. Taylor, WB6UUT wrote:

> The Cinnamon desktop is more windows-like than Windows 10.

It took some doing but I made Win 10 look and feel like "real windows"
(Win 7).

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

>From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Re: [Elecraft] K2 K2/100 post FD review

[Eric Norris]

Congratulations, Mike!  Please let us ALL know how it goes, as we of the K2
clan learn something with every post.

73 Eric WD6DBM

On Sun, Jun 28, 2020, 2:12 PM Mike Kopacki  wrote:

> Well, that gives me something to do!  I’ll let you know how it goes.
>
> Thanks,
> Mike NJ2OM
>
> > On Jun 28, 2020, at 4:41 PM, Don Wilhelm  wrote:
> >
> > Mike,
> >
> > Congratulations on finishing the K2/100.
> >
> > On the power output variation, that is not normal.
> > First check the voltage delivered to the K2 while in transmit.
> > You should do that by tapping DISPLAY and scrolling to the voltage
> display.  Your power source should provide at least 13.8 volts, but higher
> (up to 15 volts) is better.  If the voltage shown by the K2 display during
> transmit is less than 12.6, make certain all power cable connections are
> tight.
> >
> > If the power supply voltage is not the problem, then remove the KPA100
> from the base K2 and realign the bandpass filters.  Connect a dummy load to
> the base K2 BNC ANT jack.  After that, check the maximum power from the
> base K2 - you should have at least 10 watts on each band.  Record the power
> for each band.
> >
> > Using a dummy load takes away any question about your antennas.  Always
> check into a dummy load - with an in-line wattmeter if necessary.
> >
> > The other possibility is that you have a problem in the Low Pass Filter
> in the KPA100.  To check for that, re-install the KPA100, but power the
> base K2 from the coaxial power jack (no power to the KPA100 - connect the
> dummy load to the SO2339 jack on the KPA100.
> > Again check the maximum power on each band from the base K2.  It should
> be no more than 5% less than you found with the base K2 only.
> > If there is a substantial difference in power, then check the KPA100 Low
> Pass Filter - particularly checking the number of turns on the toroids.
> >
> > 73,
> > Don W3FPR
> >
> >
> >> On 6/28/2020 4:04 PM, NJMike wrote:
> >> I did notice a variation on the power output on different bands:
> >> 80m - 100w
> >> 40m - 100w
> >> 20m - 80w
> >> 15m - 50w
> >> 10m - 30w
> >> SWR was never above 1.3-1.
> >> Does that sound normal?
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[Elecraft] RFE KAT500 One Button Tune

[Eric Norris]

I really like the One Button Tune feature on the KPA1500 (press ATU TUNE on
the K3, and the KPA1500 ATU does a tune sequence).  Would it be possible to
implement this on the K4 (if not the K3) for the KAT500 as well?

73 Eric WD6DBM
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Re: [Elecraft] K2 K2/100 post FD review

[Mike Kopacki]

I can run through some of the items you suggest. But I don’t have an external 
wattmeter that can measure 100 watts. I do have a QRP wattmeter. 

I will start tomorrow to try and work through the question. 

But to be completely accurate...you are saying that the KPA100 wattmeter (which 
is what I see when pressing TUNE and DISPLAY together), should read the same as 
the REQUESTED power (which is what the power knob sets)?

Thanks,
Mike NJ2OM 

> On Jun 28, 2020, at 8:58 PM, Eric Norris  wrote:
> 
> 
> Congratulations, Mike!  Please let us ALL know how it goes, as we of the K2 
> clan learn something with every post.
> 
> 73 Eric WD6DBM
> 
>> On Sun, Jun 28, 2020, 2:12 PM Mike Kopacki  wrote:
>> Well, that gives me something to do!  I’ll let you know how it goes. 
>> 
>> Thanks,
>> Mike NJ2OM 
>> 
>> > On Jun 28, 2020, at 4:41 PM, Don Wilhelm  wrote:
>> > 
>> > Mike,
>> > 
>> > Congratulations on finishing the K2/100.
>> > 
>> > On the power output variation, that is not normal.
>> > First check the voltage delivered to the K2 while in transmit.
>> > You should do that by tapping DISPLAY and scrolling to the voltage 
>> > display.  Your power source should provide at least 13.8 volts, but higher 
>> > (up to 15 volts) is better.  If the voltage shown by the K2 display during 
>> > transmit is less than 12.6, make certain all power cable connections are 
>> > tight.
>> > 
>> > If the power supply voltage is not the problem, then remove the KPA100 
>> > from the base K2 and realign the bandpass filters.  Connect a dummy load 
>> > to the base K2 BNC ANT jack.  After that, check the maximum power from the 
>> > base K2 - you should have at least 10 watts on each band.  Record the 
>> > power for each band.
>> > 
>> > Using a dummy load takes away any question about your antennas.  Always 
>> > check into a dummy load - with an in-line wattmeter if necessary.
>> > 
>> > The other possibility is that you have a problem in the Low Pass Filter in 
>> > the KPA100.  To check for that, re-install the KPA100, but power the base 
>> > K2 from the coaxial power jack (no power to the KPA100 - connect the dummy 
>> > load to the SO2339 jack on the KPA100.
>> > Again check the maximum power on each band from the base K2.  It should be 
>> > no more than 5% less than you found with the base K2 only.
>> > If there is a substantial difference in power, then check the KPA100 Low 
>> > Pass Filter - particularly checking the number of turns on the toroids.
>> > 
>> > 73,
>> > Don W3FPR
>> > 
>> > 
>> >> On 6/28/2020 4:04 PM, NJMike wrote:
>> >> I did notice a variation on the power output on different bands:
>> >> 80m - 100w
>> >> 40m - 100w
>> >> 20m - 80w
>> >> 15m - 50w
>> >> 10m - 30w
>> >> SWR was never above 1.3-1.
>> >> Does that sound normal?
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Re: [Elecraft] K4 on Digital Modes

[Joe DeVincentis]

I am aware of the KY command, but it is limited to 24 characters per command.  
And as far as I can tell no system supports it in a conversational mode (e.g. 
fldigi, mmtty, etc) in the same way an external modem is supported.

Joe, KO8V

> On Jun 28, 2020, at 20:21, Bill Frantz  wrote:
> 
> The K3 will accept a command through the CAT interface to send CW/RTTY/PSK. 
> The K4 should as well.
> 
> 73 Bill AE6JV

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Re: [Elecraft] RFE KAT500 One Button Tune

[Jack Brindle via Elecraft]

In a word, no. The KAT500 listens to the K3 over the Auxbus, but does not have 
the ability to talk to the K3. So, there is no way for the KAT500 to tell the 
K3 about tune.
I feel your frustration, and wish we could implement this capability.

73!
Jack, W6FB


> On Jun 28, 2020, at 6:06 PM, Eric Norris  wrote:
> 
> I really like the One Button Tune feature on the KPA1500 (press ATU TUNE on
> the K3, and the KPA1500 ATU does a tune sequence).  Would it be possible to
> implement this on the K4 (if not the K3) for the KAT500 as well?
> 
> 73 Eric WD6DBM
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Re: [Elecraft] K2 K2/100 post FD review

[Don Wilhelm]

Mike,

No, the KPA100 wattmeter will display the actual power being produced if 
it is well calibrated.
That is not necessarily the same as the requested power, although with a 
properly working KPA100 and a calibrated KPA100 wattmeter, the reading 
should be the same.


73,
Don W3FPR

On 6/28/2020 9:41 PM, Mike Kopacki wrote:
I can run through some of the items you suggest. But I don’t have an 
external wattmeter that can measure 100 watts. I do have a QRP wattmeter.


I will start tomorrow to try and work through the question.

But to be completely accurate...you are saying that the KPA100 
wattmeter (which is what I see when pressing TUNE and DISPLAY 
together), should read the same as the REQUESTED power (which is what 
the power knob sets)?


Thanks,
Mike NJ2OM

On Jun 28, 2020, at 8:58 PM, Eric Norris  
wrote:



Congratulations, Mike!  Please let us ALL know how it goes, as we of 
the K2 clan learn something with every post.


73 Eric WD6DBM

On Sun, Jun 28, 2020, 2:12 PM Mike Kopacki > wrote:


Well, that gives me something to do!  I’ll let you know how it goes.

Thanks,
Mike NJ2OM

> On Jun 28, 2020, at 4:41 PM, Don Wilhelm
mailto:donw...@embarqmail.com>> wrote:
>
> Mike,
>
> Congratulations on finishing the K2/100.
>
> On the power output variation, that is not normal.
> First check the voltage delivered to the K2 while in transmit.
> You should do that by tapping DISPLAY and scrolling to the
voltage display.  Your power source should provide at least 13.8
volts, but higher (up to 15 volts) is better.  If the voltage
shown by the K2 display during transmit is less than 12.6, make
certain all power cable connections are tight.
>
> If the power supply voltage is not the problem, then remove the
KPA100 from the base K2 and realign the bandpass filters. 
Connect a dummy load to the base K2 BNC ANT jack.  After that,
check the maximum power from the base K2 - you should have at
least 10 watts on each band.  Record the power for each band.
>
> Using a dummy load takes away any question about your
antennas.  Always check into a dummy load - with an in-line
wattmeter if necessary.
>
> The other possibility is that you have a problem in the Low
Pass Filter in the KPA100.  To check for that, re-install the
KPA100, but power the base K2 from the coaxial power jack (no
power to the KPA100 - connect the dummy load to the SO2339 jack
on the KPA100.
> Again check the maximum power on each band from the base K2. 
It should be no more than 5% less than you found with the base K2
only.
> If there is a substantial difference in power, then check the
KPA100 Low Pass Filter - particularly checking the number of
turns on the toroids.
>
> 73,
> Don W3FPR
>
>
>> On 6/28/2020 4:04 PM, NJMike wrote:
>> I did notice a variation on the power output on different bands:
>> 80m - 100w
>> 40m - 100w
>> 20m - 80w
>> 15m - 50w
>> 10m - 30w
>> SWR was never above 1.3-1.
>> Does that sound normal?
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