Re: [Elecraft] RFI in audio chain

[Jan Ditzian]

I will continue to try solutions, but they seem to be getting random.

I found my long 50-ohm coax run to the 80-meter vertical.  It ends in a 
DX Engineering 1:1 balun with terminals.  I have tried this before.  I 
connected one of the terminals to the vertical and the other to the 
ground base.  The result was an SWR a little lower than with the 
hardline, patched-together feedline, but RFI when I run power.   I do 
not have a choke or balun on the proximal (shack) end.


It is difficult to assess the radials, but I hope to get some more time 
tomorrow to do this.


73,

Jan, KX2A

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[Elecraft] K3S USB RS232 P3 Conundrum

[tom]

Just put my first K3S on line, replacing a K3. For the moment, I am using
the E980297 cable to go to the P3 and then the P3 to the computer. 
I also have a Y at the computer with a cable going to the CAT input to the
Acom 2000A amplifier. Acom says they get serial data from pins 1 and 5, but
the logging program is what talks to the Acom. I have not figured out the
ramifications of this, but I am temporarily not using the K3CAT feature with
the Acom as it has not been reliable.
 
So, If I wanted to use the USB interface to take advantage of the sound
board options, I could use the CBLP3Y for the P3. But how can I communicate
with the Acom?
Gotta figure this out before I have three K3S talking to three Acom 2000A's
and three P3's!
 
Tom Taormina, K5RC
Comstock Memorial Station, W7RN
Storey County ARES, KS7AA
www.w7rn.com   
 
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Re: [Elecraft] K3S USB RS232 P3 Conundrum

[Eric Swartz - WA6HHQ, Elecraft]

RS232 DB9 "Y" off of the computer side of the P3. Make sure you are only 
listening and not hooked up to send data to the P3/K3 via this path.


We basically take the USB comm data between the K3 and the computer and then 
echo it out the RJ45 CBLP3Y connector to the computer input DB9 on the P3. The 
other connector on that cable returns the P3 data to the K3, along with the 
computer data.


Eric
/elecraft.com/

On 11/24/2015 4:38 PM, t...@k5rc.com wrote:

Just put my first K3S on line, replacing a K3. For the moment, I am using
the E980297 cable to go to the P3 and then the P3 to the computer.
I also have a Y at the computer with a cable going to the CAT input to the
Acom 2000A amplifier. Acom says they get serial data from pins 1 and 5, but
the logging program is what talks to the Acom. I have not figured out the
ramifications of this, but I am temporarily not using the K3CAT feature with
the Acom as it has not been reliable.
  
So, If I wanted to use the USB interface to take advantage of the sound

board options, I could use the CBLP3Y for the P3. But how can I communicate
with the Acom?
Gotta figure this out before I have three K3S talking to three Acom 2000A's
and three P3's!
  
Tom Taormina, K5RC

Comstock Memorial Station, W7RN
Storey County ARES, KS7AA
www.w7rn.com 
  
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Re: [Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

As I responded to to Mark off list, I know the REF ADC calibration and
had already performed it *before* asking for assistance here.  The
voltage display was off by more than 0.5 V prior to performing REF ADC.
The remaining the error is still unacceptably high at more than 0.2 
Volts when a simple DVM has significantly greater accuracy.


I *still* seem to recall a calibration procedure for voltage similar to
that for FP, PA, etc. during the initial assembly and test of this K3.
It seems inconceivable that such a calibration process would not be
present since the "12V" sense point follows at least D6 if not D6, Q2,
RFC40 and R36 which in total would introduce a substantial fraction of
a volt offset from the voltage at the APP and provided to the KPA3.

73,

  ... Joe, W4TV


On 11/24/2015 6:32 PM, Mark E. Musick wrote:

I sent Joe K3 manual REV D6 from early in 2010.
On page 53 of that manual it has the following description for ADC REF and
how to calibrate it.

ADC REF

Allows calibration of the voltage reference used by the K3 to measure and
display
certain values, such as the rig's supply voltage. (Optional.) First,
disconnect
anything attached to the ACC jack. Next, locate the ADC REF menu entry. It
will
initially show 5.00 volts as the reference voltage. Using a DMM set to DC
volts,
measure the actual voltage at pin 2 of the ACC jack. This must be done while
the
ADC REF parameter is being displayed. (Note: The (-) probe of the DMM
should go to the K3's chassis ground, e.g. at the GROUND lug.) Finally, use
VFO
A to set the ADC REF menu parameter to what you measured at pin 2.

So you need to set ADC REF to the voltage on pin 2 of the ACC jack. NOT what
is at the APP connection on the RF board.

73,

Mark Musick, WB9CIF

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian
& Cyndi
Sent: Tuesday, November 24, 2015 11:19 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Voltmeter calibration ...

And the info below is what I found in Fred Cady's book on the K3. There is
no other "calibration" for voltage in that book.

Until Don Wilhelm or Wayne Burdick chimes in,  I suspect there may not be
any other adjustment available.

73,
Brian, W6FVI

On 11/24/2015 1:49 PM, Joe Subich, W4TV wrote:


I've already set ADC REF as documented in the manual.  The Voltage is
still off.  There should be a procedure to set the voltage as there
was when I assembled this K3 (s/n 1450) several years ago.
Unfortunately, I can no longer find it in the current Owner's Manual
or Assembly Manual.

73,

   ... Joe, W4TV


On 11/24/2015 4:01 PM, Brian & Cyndi wrote:

Joe, if you just want to make the K3's voltmeter match your "known good"
reference meter, you need to adjust the "ADC REF" value.

Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF"
setting.  Note what it is before changing anything, in case this
adjustment affects anything else adversely.  Adjust the ADC REF value
to cause the voltmeter display to read the value you want. You will
need to go in and out of the menu display to see the results (kinda

clumsy).


Again, this adjustment may affect other measurements, so an accurate
K3 voltmeter may not be that important after all.

73,
Brian, W6FVI

On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:


It matters not if there is a series diode.  The Voltmeter should be
calibrated to the input power.  I remember that being the case when
I assembled my first K3.

73,

... Joe, W4TV


On 11/24/2015 11:02 AM, Michael Blake wrote:

Joe, is there not at least one diode junction or solid state switch
in series with the input power inside the K3?

Michael Blake - K9JRI





On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV 
wrote:


OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the
first time in 30 years (one of the diodes shorted) and when I put
it back on line I decided to double check the K3 Volts display
against the actual output of the supply.  The K3 is reading about
0.2V less than the supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the
voltage display.

73,

... Joe, W4TV

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Re: [Elecraft] P3 Showing Transmit Signal

[Gene Gabry]

I wonder if this phenomenon could be related to N1MM+. I have never seen
this happen before (without N1MM+ running). I was using N1MM+ logging with a
lot of functions running. That might explain the delay. Interesting.

Gene N9TF


The K3 is supposed to send a command to the P3 to tell it whether it is in
transmit or receive mode.  Apparently sometimes that isn't happening for
some reason.  It could be an intermittent RS-232 connection between the K3
and the P3 or perhaps some software running on a PC is overloading the
RS-232 with tons of commands.

Alan N1AL


On 11/24/2015 08:55 AM, Bud Governale wrote:
> I noticed this weekend that occasionally during transmit instead of 
> the scan freezing in place it would continue scanning showing only my 
> transmit signal with only that signal appearing in the black waterfall.
>
> I don't have the P3TXMON. It never did this before.
>
> I was viewing the external SVGA monitor.
>
> Any idea why?
>
> 73,
>
> Bud W3LL
>
>
> 

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Re: [Elecraft] K3 Voltmeter calibration ...

[Walter Underwood]

The measured voltage is what the rig is really seeing, after the protection. If 
you don’t want that, you need to put your own voltmeter outside the rig.

A 0.2V difference isn’t calibration, this is you disagreeing with an Elecraft 
design decision.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Nov 24, 2015, at 4:55 PM, Joe Subich, W4TV  wrote:
> 
> 
> As I responded to to Mark off list, I know the REF ADC calibration and
> had already performed it *before* asking for assistance here.  The
> voltage display was off by more than 0.5 V prior to performing REF ADC.
> The remaining the error is still unacceptably high at more than 0.2 Volts 
> when a simple DVM has significantly greater accuracy.
> 
> I *still* seem to recall a calibration procedure for voltage similar to
> that for FP, PA, etc. during the initial assembly and test of this K3.
> It seems inconceivable that such a calibration process would not be
> present since the "12V" sense point follows at least D6 if not D6, Q2,
> RFC40 and R36 which in total would introduce a substantial fraction of
> a volt offset from the voltage at the APP and provided to the KPA3.
> 
> 73,
> 
>  ... Joe, W4TV
> 
> 
> On 11/24/2015 6:32 PM, Mark E. Musick wrote:
>> I sent Joe K3 manual REV D6 from early in 2010.
>> On page 53 of that manual it has the following description for ADC REF and
>> how to calibrate it.
>> 
>> ADC REF
>> 
>> Allows calibration of the voltage reference used by the K3 to measure and
>> display
>> certain values, such as the rig's supply voltage. (Optional.) First,
>> disconnect
>> anything attached to the ACC jack. Next, locate the ADC REF menu entry. It
>> will
>> initially show 5.00 volts as the reference voltage. Using a DMM set to DC
>> volts,
>> measure the actual voltage at pin 2 of the ACC jack. This must be done while
>> the
>> ADC REF parameter is being displayed. (Note: The (-) probe of the DMM
>> should go to the K3's chassis ground, e.g. at the GROUND lug.) Finally, use
>> VFO
>> A to set the ADC REF menu parameter to what you measured at pin 2.
>> 
>> So you need to set ADC REF to the voltage on pin 2 of the ACC jack. NOT what
>> is at the APP connection on the RF board.
>> 
>> 73,
>> 
>> Mark Musick, WB9CIF
>> 
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian
>> & Cyndi
>> Sent: Tuesday, November 24, 2015 11:19 PM
>> To: elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] K3 Voltmeter calibration ...
>> 
>> And the info below is what I found in Fred Cady's book on the K3. There is
>> no other "calibration" for voltage in that book.
>> 
>> Until Don Wilhelm or Wayne Burdick chimes in,  I suspect there may not be
>> any other adjustment available.
>> 
>> 73,
>> Brian, W6FVI
>> 
>> On 11/24/2015 1:49 PM, Joe Subich, W4TV wrote:
>>> 
>>> I've already set ADC REF as documented in the manual.  The Voltage is
>>> still off.  There should be a procedure to set the voltage as there
>>> was when I assembled this K3 (s/n 1450) several years ago.
>>> Unfortunately, I can no longer find it in the current Owner's Manual
>>> or Assembly Manual.
>>> 
>>> 73,
>>> 
>>>   ... Joe, W4TV
>>> 
>>> 
>>> On 11/24/2015 4:01 PM, Brian & Cyndi wrote:
 Joe, if you just want to make the K3's voltmeter match your "known good"
 reference meter, you need to adjust the "ADC REF" value.
 
 Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF"
 setting.  Note what it is before changing anything, in case this
 adjustment affects anything else adversely.  Adjust the ADC REF value
 to cause the voltmeter display to read the value you want. You will
 need to go in and out of the menu display to see the results (kinda
>> clumsy).
 
 Again, this adjustment may affect other measurements, so an accurate
 K3 voltmeter may not be that important after all.
 
 73,
 Brian, W6FVI
 
 On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:
> 
> It matters not if there is a series diode.  The Voltmeter should be
> calibrated to the input power.  I remember that being the case when
> I assembled my first K3.
> 
> 73,
> 
>... Joe, W4TV
> 
> 
> On 11/24/2015 11:02 AM, Michael Blake wrote:
>> Joe, is there not at least one diode junction or solid state switch
>> in series with the input power inside the K3?
>> 
>> Michael Blake - K9JRI
>> 
>> 
>> 
>> 
>>> On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV 
>>> wrote:
>>> 
>>> 
>>> OK, I'm sure I am overlooking something simple but I can not find
>>> (or remember) how to calibrate the voltage display in the K3.
>>> 
>>> I had to repair one of my Astron RS-35A power supplies for the
>>> first time in 30 years (one of the diodes shorted) and when I put
>>> it back on line I decided to double check the K3 Volts display

Re: [Elecraft] P3 Showing Transmit Signal

[Alan]

The K3 is supposed to send a command to the P3 to tell it whether it is 
in transmit or receive mode.  Apparently sometimes that isn't happening 
for some reason.  It could be an intermittent RS-232 connection between 
the K3 and the P3 or perhaps some software running on a PC is 
overloading the RS-232 with tons of commands.


Alan N1AL


On 11/24/2015 08:55 AM, Bud Governale wrote:

I noticed this weekend that occasionally during transmit instead of the
scan freezing in place it would continue scanning showing only my
transmit signal with only that signal appearing in the black waterfall.

I don't have the P3TXMON. It never did this before.

I was viewing the external SVGA monitor.

Any idea why?

73,

Bud W3LL





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Re: [Elecraft] K1 headphone jack

[Don Wilhelm]

Actually, the failure is because the lever that operates the switch at 
the rear of the jack has broken.
That failure has nothing to do with lateral forces on the key jack, but 
is a failure that is related more to the number of times the headphone 
jack has been inserted and removed.  If the lever is not operated, it is 
not likely to fail.


73,
Don W3FPR

On 11/23/2015 1:06 PM, Ron D'Eau Claire wrote:

The problem seems to be the leverage the plug provides to allow the plug to
move inside the jack and damage the switch if the phones cord is tugged.

My K2 has the original jack after many hours of use, but as it happens I
have a right-angle plug so there is no long lever to apply force on the
internal components in the jack if I tug on the cord accidentally.




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Re: [Elecraft] K1 power output on 15 meters

[Don Wilhelm]

The K1 should develop greater than 5 watts on any band as long as the 
power supply during transmit is greater than 12 volts.


I suggest turning to the Troubleshooting section of the Owner's manual 
and doing the Transmit Signal Tracing procedures to determine which 
stage is failing.   Once that stage is located, we may be able to help 
with further troubleshooting of that particular.


73,
Don W3FPR

On 11/23/2015 11:28 AM, Gee wrote:

What should the power output be from a K1 set to maximum power on 15 meters? I 
can only get 2 watts. This seems too low. With the same K1 and a 40/20 module I 
get 6 watts on both bands.  I've checked the 30/15 module for any errors but it 
looks good. 30 meters produces 6 watts.  Any suggestions where to look? Thanks 
all!



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Re: [Elecraft] P3 Showing Transmit Signal

[Gene Gabry]

I noticed this a few times as well with my K3S and P3. When it happened, I
was running a frequency, and I would go into TX sometimes before the P3
would unfreeze and the P3 would display my TX peak, following my modulation.
Seemed to maybe happen at some transition of the P3 going back to RX when I
keyed the microphone. Also noticed sporadic freeze decay of P3 after
stopping TX. Most times it switched to RX right away, but sometimes it hung
up for a second or two. I thought I was seeing things! 

Any ideas out there?

Gene, N9TF
K3S 10057 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bud
Governale
Sent: Tuesday, November 24, 2015 10:56 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] P3 Showing Transmit Signal

I noticed this weekend that occasionally during transmit instead of the scan
freezing in place it would continue scanning showing only my transmit signal
with only that signal appearing in the black waterfall.

I don't have the P3TXMON. It never did this before.

I was viewing the external SVGA monitor.

Any idea why?

73,

Bud W3LL





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Re: [Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

On 11/24/2015 8:17 PM, Walter Underwood wrote:

The measured voltage is what the rig is really seeing, after the
protection.


That *is not the case* I've checked the voltage on the KPA3 and, again,
the Voltage display is approximately 0.2 Volts *lower* than measured at
"12PA" - the output of CB1.

Again, *HOW DOES ONE CALIBRATE THE VOLTAGE DISPLAY?*

CONFIG: ADC REF matches the voltage measured at pin 2 of the ACC jack
with nothing connected to the +12V Out.  However, the Voltage display
does not match the voltage at either the APP or +12PA.  That the
"meter" is not accurate at *either of the two* most important points
- the two points that have the greatest impact on performance - is not
acceptable.

*HOW DOES ONE CALIBRATE THE VOLTAGE DISPLAY?*

73,

  ... Joe, W4TV


On 11/24/2015 8:17 PM, Walter Underwood wrote:

The measured voltage is what the rig is really seeing, after the protection. If 
you don’t want that, you need to put your own voltmeter outside the rig.

A 0.2V difference isn’t calibration, this is you disagreeing with an Elecraft 
design decision.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)


On Nov 24, 2015, at 4:55 PM, Joe Subich, W4TV  wrote:


As I responded to to Mark off list, I know the REF ADC calibration and
had already performed it *before* asking for assistance here.  The
voltage display was off by more than 0.5 V prior to performing REF ADC.
The remaining the error is still unacceptably high at more than 0.2 Volts when 
a simple DVM has significantly greater accuracy.

I *still* seem to recall a calibration procedure for voltage similar to
that for FP, PA, etc. during the initial assembly and test of this K3.
It seems inconceivable that such a calibration process would not be
present since the "12V" sense point follows at least D6 if not D6, Q2,
RFC40 and R36 which in total would introduce a substantial fraction of
a volt offset from the voltage at the APP and provided to the KPA3.

73,

  ... Joe, W4TV


On 11/24/2015 6:32 PM, Mark E. Musick wrote:

I sent Joe K3 manual REV D6 from early in 2010.
On page 53 of that manual it has the following description for ADC REF and
how to calibrate it.

ADC REF

Allows calibration of the voltage reference used by the K3 to measure and
display
certain values, such as the rig's supply voltage. (Optional.) First,
disconnect
anything attached to the ACC jack. Next, locate the ADC REF menu entry. It
will
initially show 5.00 volts as the reference voltage. Using a DMM set to DC
volts,
measure the actual voltage at pin 2 of the ACC jack. This must be done while
the
ADC REF parameter is being displayed. (Note: The (-) probe of the DMM
should go to the K3's chassis ground, e.g. at the GROUND lug.) Finally, use
VFO
A to set the ADC REF menu parameter to what you measured at pin 2.

So you need to set ADC REF to the voltage on pin 2 of the ACC jack. NOT what
is at the APP connection on the RF board.

73,

Mark Musick, WB9CIF

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian
& Cyndi
Sent: Tuesday, November 24, 2015 11:19 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Voltmeter calibration ...

And the info below is what I found in Fred Cady's book on the K3. There is
no other "calibration" for voltage in that book.

Until Don Wilhelm or Wayne Burdick chimes in,  I suspect there may not be
any other adjustment available.

73,
Brian, W6FVI

On 11/24/2015 1:49 PM, Joe Subich, W4TV wrote:


I've already set ADC REF as documented in the manual.  The Voltage is
still off.  There should be a procedure to set the voltage as there
was when I assembled this K3 (s/n 1450) several years ago.
Unfortunately, I can no longer find it in the current Owner's Manual
or Assembly Manual.

73,

   ... Joe, W4TV


On 11/24/2015 4:01 PM, Brian & Cyndi wrote:

Joe, if you just want to make the K3's voltmeter match your "known good"
reference meter, you need to adjust the "ADC REF" value.

Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF"
setting.  Note what it is before changing anything, in case this
adjustment affects anything else adversely.  Adjust the ADC REF value
to cause the voltmeter display to read the value you want. You will
need to go in and out of the menu display to see the results (kinda

clumsy).


Again, this adjustment may affect other measurements, so an accurate
K3 voltmeter may not be that important after all.

73,
Brian, W6FVI

On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:


It matters not if there is a series diode.  The Voltmeter should be
calibrated to the input power.  I remember that being the case when
I assembled my first K3.

73,

... Joe, W4TV


On 11/24/2015 11:02 AM, Michael Blake wrote:

Joe, is there not at least one diode junction or solid state switch
in series with the input power inside the K3?

Michael Blake - K9JRI





On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV 

Re: [Elecraft] Using X-lock to stabilize PLL osc??

[N2PD]

Well, I made some measurements tonite.  Using the k2 counter to track the BFO
and an external counter to track the PLL, I measured from cold start to 45
minutes, with no transmitting.  The results:
PLL drifted 50hz UP, and the BFO drifted 60 hz DOWN.  Perfect for the higher
bands where they almost cancel, but not so for the lower bands where they
add (do I have that right?).
Does anyone have any info on frequency compensating the oscillators using
negative coefficient caps?




-
Paul, N2PD
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Re: [Elecraft] K1 headphone jack

[Ron D'Eau Claire]

Don, if I move the body of the plug laterally the tip of the plug in contact
with the spring contact and switch moves laterally inside the jack itself
with the ferrule at the opening of the jack acting as a fulcrum. So it's
hard to understand why you think that cannot cause the failure.  

73, Ron AC7AC

-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com] 
Sent: Tuesday, November 24, 2015 6:15 PM
To: Ron D'Eau Claire; mbyr...@tampabay.rr.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K1 headphone jack

Actually, the failure is because the lever that operates the switch at the
rear of the jack has broken.
That failure has nothing to do with lateral forces on the key jack, but is a
failure that is related more to the number of times the headphone jack has
been inserted and removed.  If the lever is not operated, it is not likely
to fail.

73,
Don W3FPR

On 11/23/2015 1:06 PM, Ron D'Eau Claire wrote:
> The problem seems to be the leverage the plug provides to allow the plug
to
> move inside the jack and damage the switch if the phones cord is tugged.
>
> My K2 has the original jack after many hours of use, but as it happens I
> have a right-angle plug so there is no long lever to apply force on the
> internal components in the jack if I tug on the cord accidentally.
>
>


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Re: [Elecraft] KX3 VSWR problem

[WD4SDC]

Jim Rodenkirch wrote
> 
> I'm not sure I understand..are you saying with the ATU removed the
> VSWR is 1.2:1 and with it
> 
> installed but not tuned it's 1.8:1 until the ATU "kicks in and does its
> job???



Hi Jim,

Sorry for the confusion. I'll pull everything into this post to put it in
the correct context:

Problem:
6M band -> VSWR 1.8:1 (KX3 meter) on 50ohm load connected directly to ant
connector (no cable).
ATU - bypass mode
Load verified good.
All other bands good.
ATU will match to 1:1 if enabled and tune requested.
After ATU match, 25ohm load yields 2:1 (KX3 VSWR meter test - OK).

So the issue was that the ATU in bypass mode on 6M into good load gives a
1.8:1 VSWR. 

Working with Elecraft support, I removed the ATU board to check VSWR w/o the
ATU in the line.  That checked good 1.2:1. The ATU in bypass mode on 6M does
not quite function as a 50 ohm transmission line.  For my particular unit,
it was higher than expected.  1.4:1 is considered OK.  If the ATU is enabled
and tune is engaged, it has no problem matching the output stage to the load
and delivering rated power. So, operationally not really an issue. Just
leave the ATU enabled and tuned.

The reason for going into bypass mode was to perform a TX gain cal
procedure, which specifies the ATU must be set to bypass. I used the KX3
utility to do this and it sets the ATU to bypass and steps thru each band. 
When it got to 6M, it failed - probably because the foldback circuit was
kicking in @ 1.8:1 and/or the output stage can't deliver the 6 watts need to
complete the cal into that mismatch.  Doing the cal manually with the ATU on
and matched for 6M band works fine. 

Hopefully, this provides a more useful note for anyone else that may have a
similar issue.

Trying to contribute back to the list - as I have learned a lot using this
resource.

Steve
WD4SDC





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Re: [Elecraft] K3 Voltmeter calibration ...

[Ron D'Eau Claire]

Joe, as a point of reference, I have a K3 with the bottom off on the bench
so I checked the voltage at the terminals of the APP connector on the RF
board with two DMMs. One DMM says 13.63 and the other says 13.66. The FP
display says 13.4. 

It sure looks like they aren't compensating for the 0.2VDC drop across the
reverse protection diode. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe
Subich, W4TV
Sent: Tuesday, November 24, 2015 9:31 AM
To: Robert Nobis; Elecraft
Subject: Re: [Elecraft] K3 Voltmeter calibration ...


> You could easily drop 0.2 volts in the cable depending how long it 
> isand the gauge of the wire.

Not in six feet of #10 wire at 1.5A.  Even if it were #12 the voltage drop
should be less than 0.03V (1.62 Ohms/1000 feet for #12).

73,

... Joe, W4TV


On 11/24/2015 10:39 AM, Robert Nobis wrote:
> Joe,
>
> How long is your power cable from the RS-35A to your K3, and what gauge
wire is used?  You could easily drop 0.2 volts in the cable depending how
long it is and the gauge of the wire.
>
> 73,
>
>
> Bob Nobis - N7RJN
> n7...@nobis.net
>
>
>> On Nov 24, 2015, at 08:06, Joe Subich, W4TV  wrote:
>>
>>
>> OK, I'm sure I am overlooking something simple but I can not find (or 
>> remember) how to calibrate the voltage display in the K3.
>>
>> I had to repair one of my Astron RS-35A power supplies for the first 
>> time in 30 years (one of the diodes shorted) and when I put it back 
>> on line I decided to double check the K3 Volts display against the 
>> actual output of the supply.  The K3 is reading about 0.2V less than 
>> the supply voltage.
>>
>> I've been over both the K3 Owner's Manual and the K3 Assembly 
>> Instructions but can't find any reference to calibrating the voltage 
>> display.
>>
>> 73,
>>
>>... Joe, W4TV
>>
>> __
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>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>> This list hosted by: http://www.qsl.net Please help support this 
>> email list: http://www.qsl.net/donate.html Message delivered to 
>> n7...@nobis.net
>>
>
>
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[Elecraft] W1 Power Meter For Sale

[Rod Hotz]

I have a like new Elecraft W1 Power Meter for sale. It is built into a W8FGU
LexanR enclosure and stand with BNC connectors on the back side of the
enclosure and a power on/off switch. Includes the Elecraft and W8FGU
manuals. Will ship priority and insure in the continental US for $130.
Payment must be by US Postal money order. Please contact me off list if
interested. All questions answered immediately.

 

73,

 

Rod, K5BGB 

 

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[Elecraft] Palm single paddle (cootie) and KX1

[John Flynn]

Hi Everyone

I'm having a problem getting my Palm single paddle to operate in cootie
mode with my KX1. It works fine as a paddle.  I've tried selecting the
cootie position on the paddle and selecting the handkey option on the KX1
menu. Any suggestions?

BTW, the paddle works great with my KX3 as a cootie.

Tnx es 72/73

John K4ARQ

-- 
John Flynn
Tallahassee, Florida
USA
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Re: [Elecraft] Stereo Speaker for K3

[Terry Schieler]

Hi Steve, 

I have used a pair of Motorola HSN4018C mobile radio speakers with my K3 for 
years, as well as now with my new K3S.  They are tailored for 
communications-grade voice frequency response.  They are black and look great 
next to the rig.  They are not inexpensive if you order them new, but your 
local two-way radio shop will likely have these or something similar in the HSN 
series that were recovered during commercial mobile radio removals.  You can 
often get a decent price on a pair.

73-

Terry, W0FM



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Re: [Elecraft] K3 Voltmeter calibration ...

[Robert Nobis]

A variation of 0.2 volts at 13.6V is less than 1.5%. I wonder how accurate the 
voltage measuring circuitry is in the K3?

73,

Bob


Bob Nobis - N7RJN
n7...@nobis.net


> On Nov 24, 2015, at 15:39, Ron D'Eau Claire  wrote:
> 
> Joe, as a point of reference, I have a K3 with the bottom off on the bench
> so I checked the voltage at the terminals of the APP connector on the RF
> board with two DMMs. One DMM says 13.63 and the other says 13.66. The FP
> display says 13.4. 
> 
> It sure looks like they aren't compensating for the 0.2VDC drop across the
> reverse protection diode. 
> 
> 73, Ron AC7AC
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe
> Subich, W4TV
> Sent: Tuesday, November 24, 2015 9:31 AM
> To: Robert Nobis; Elecraft
> Subject: Re: [Elecraft] K3 Voltmeter calibration ...
> 
> 
>> You could easily drop 0.2 volts in the cable depending how long it 
>> isand the gauge of the wire.
> 
> Not in six feet of #10 wire at 1.5A.  Even if it were #12 the voltage drop
> should be less than 0.03V (1.62 Ohms/1000 feet for #12).
> 
> 73,
> 
>... Joe, W4TV
> 
> 
> On 11/24/2015 10:39 AM, Robert Nobis wrote:
>> Joe,
>> 
>> How long is your power cable from the RS-35A to your K3, and what gauge
> wire is used?  You could easily drop 0.2 volts in the cable depending how
> long it is and the gauge of the wire.
>> 
>> 73,
>> 
>> 
>> Bob Nobis - N7RJN
>> n7...@nobis.net
>> 
>> 
>>> On Nov 24, 2015, at 08:06, Joe Subich, W4TV  wrote:
>>> 
>>> 
>>> OK, I'm sure I am overlooking something simple but I can not find (or 
>>> remember) how to calibrate the voltage display in the K3.
>>> 
>>> I had to repair one of my Astron RS-35A power supplies for the first 
>>> time in 30 years (one of the diodes shorted) and when I put it back 
>>> on line I decided to double check the K3 Volts display against the 
>>> actual output of the supply.  The K3 is reading about 0.2V less than 
>>> the supply voltage.
>>> 
>>> I've been over both the K3 Owner's Manual and the K3 Assembly 
>>> Instructions but can't find any reference to calibrating the voltage 
>>> display.
>>> 
>>> 73,
>>> 
>>>   ... Joe, W4TV
>>> 
>>> __
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>>> email list: http://www.qsl.net/donate.html Message delivered to 
>>> n7...@nobis.net
>>> 
>> 
>> 
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Re: [Elecraft] Stereo Speaker for K3

[Rick WA6NHC]

However, make sure that they match in volume too.  I've had two 
identical speakers with one of them several db lower in volume 
(fortunately I had more, so I used another).  Both appeared to be in 
near new condition.  Once matched, outstanding.  I've used them for many 
years in mobile environs too, zero issues.


Rick nhc

On 11/24/2015 2:24 PM, Terry Schieler wrote:

Hi Steve,

I have used a pair of Motorola HSN4018C mobile radio speakers with my K3 for 
years, as well as now with my new K3S.  They are tailored for 
communications-grade voice frequency response.  They are black and look great 
next to the rig.  They are not inexpensive if you order them new, but your 
local two-way radio shop will likely have these or something similar in the HSN 
series that were recovered during commercial mobile radio removals.  You can 
often get a decent price on a pair.

73-

Terry, W0FM


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Re: [Elecraft] K3 Voltmeter calibration ...

[Brian & Cyndi]

Joe, if you just want to make the K3's voltmeter match your "known good" 
reference meter, you need to adjust the "ADC REF" value.


Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF" 
setting.  Note what it is before changing anything, in case this 
adjustment affects anything else adversely.  Adjust the ADC REF value to 
cause the voltmeter display to read the value you want. You will need to 
go in and out of the menu display to see the results (kinda clumsy).


Again, this adjustment may affect other measurements, so an accurate K3 
voltmeter may not be that important after all.


73,
Brian, W6FVI

On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:


It matters not if there is a series diode.  The Voltmeter should
be calibrated to the input power.  I remember that being the case
when I assembled my first K3.

73,

   ... Joe, W4TV


On 11/24/2015 11:02 AM, Michael Blake wrote:
Joe, is there not at least one diode junction or solid state switch 
in series with the input power inside the K3?


Michael Blake - K9JRI




On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV  
wrote:



OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it back on
line I decided to double check the K3 Volts display against the actual
output of the supply.  The K3 is reading about 0.2V less than the
supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

   ... Joe, W4TV

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Re: [Elecraft] RFI in audio chain

[Jim Brown]

Gee whiz -- I go into the hospital for a week and thing go WAY off the 
rails!  Thanks to W4TV and W3FPR for intelligently moving the discussion 
back on track.


Questions:

EXACTLY what is the configuration the the "vertical antenna? 
Quarter-wave with radials or half wave without radials?  How many 
radials?  How long?


Where is the antenna feedpoint with respect to the radio?  What coax are 
you feeding it with?  Are you SURE that the connectors at both ends are 
properly installed and gas-pliers tight at both ends?


Is there a short, fat copper bond from chassis to chassis between every 
piece of gear in your shack?  Is there short fat copper from there to 
all the other grounds in your home?


Joe is exactly right -- ANY "balun" that isn't multiple turns of coax 
around a #43 or #31 ferrite core is USELESS at HF.  Those "string of 
beads" "baluns" sold by various vendors are badly misguided copies of 
the W2DU design, which what a very good design that used a LOT of #73 
beads.


Joe is also exactly right -- the ONLY proper connection of a cable 
shield is to the SHIELDING ENCLOSURE of the equipment it feeds. The 
cable shield should ALSO be bonded to the shielding of the microphone.


Some fundamentals:  ANY antenna that "works" will put RF in the shack -- 
it does that by radiating RF. An antenna that lacks an effective common 
mode choke will ALSO put RF onto the feedline.


Summary of suggestions/comments:

Answer the questions I asked above.  They are all important.

Download and STUDY k9yc/com/RFI-Ham.pdfand

http://k9yc.com/GroundingAndAudio.pdf

Follow these instructions carefully.  I suspect that the cause of Jan's 
problem is failure to properly connect cable shields, and/or to bond all 
the gear together.


73, Jim K9YC

On Tue,11/24/2015 6:54 AM, Joe Subich, W4TV wrote:

Not true ... the Icom uses an electret mic, not the dynamic Audio-
Technica.  If the microphone is wired correctly, the issue is in
the antenna system and probably requires improved common mode
decoupling.  Air wound solenoidal chokes are not sufficient in
the most intractable cases *like elevated verticals*.

Replace the elevated vertical with a dummy load.  If the RFI is
eliminated, the problem is in the antenna system.


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Re: [Elecraft] K3 Voltmeter calibration ...

[Fred Townsend]

Joe check your schematic and you will see there is both a polyfuse and a
diode in series with the K3 front panel. The 100w PA pulls off its current
ahead of the fuse and diode so using the front panel is not indicative of
the voltage of the current going to power amp. Hang a voltmeter on the APP
if you want accuracy. Incidentally the polyfuse will permanently change
cold value after interrupting for the first time so there is another
variable.
73
Fred, AE6QL

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe
Subich, W4TV
Sent: Tuesday, November 24, 2015 9:31 AM
To: Robert Nobis; Elecraft
Subject: Re: [Elecraft] K3 Voltmeter calibration ...


> You could easily drop 0.2 volts in the cable depending how long it 
> isand the gauge of the wire.

Not in six feet of #10 wire at 1.5A.  Even if it were #12 the voltage drop
should be less than 0.03V (1.62 Ohms/1000 feet for #12).

73,

... Joe, W4TV


On 11/24/2015 10:39 AM, Robert Nobis wrote:
> Joe,
>
> How long is your power cable from the RS-35A to your K3, and what gauge
wire is used?  You could easily drop 0.2 volts in the cable depending how
long it is and the gauge of the wire.
>
> 73,
>
>
> Bob Nobis - N7RJN
> n7...@nobis.net
>
>
>> On Nov 24, 2015, at 08:06, Joe Subich, W4TV  wrote:
>>
>>
>> OK, I'm sure I am overlooking something simple but I can not find (or 
>> remember) how to calibrate the voltage display in the K3.
>>
>> I had to repair one of my Astron RS-35A power supplies for the first 
>> time in 30 years (one of the diodes shorted) and when I put it back 
>> on line I decided to double check the K3 Volts display against the 
>> actual output of the supply.  The K3 is reading about 0.2V less than 
>> the supply voltage.
>>
>> I've been over both the K3 Owner's Manual and the K3 Assembly 
>> Instructions but can't find any reference to calibrating the voltage 
>> display.
>>
>> 73,
>>
>>... Joe, W4TV
>>
>> __
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>> n7...@nobis.net
>>
>
>
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[Elecraft] Unable to change RS 232 baud rate

[Robert Sands]

In my effort to follow the Remote shack advise to set rate at 4200? (lowest
rate) I find I cannot get the K3 to "accept" the  change. It goes back to
38000. Is not any
CONFIG change accepted with the push of the key? Any Remote Shack users?
Robert Sands
K7VO
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Re: [Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

Fred,

Diode, polyfuse, etc. does not matter.  There should be a calibration
routine so it can be set correctly.  I remember setting it when this
K3 was assembled but can not find the procedure in the current manuals.

What is the calibration procedure?


73,

   ... Joe, W4TV


On 11/24/2015 3:34 PM, Fred Townsend wrote:

Joe check your schematic and you will see there is both a polyfuse and a
diode in series with the K3 front panel. The 100w PA pulls off its current
ahead of the fuse and diode so using the front panel is not indicative of
the voltage of the current going to power amp. Hang a voltmeter on the APP
if you want accuracy. Incidentally the polyfuse will permanently change
cold value after interrupting for the first time so there is another
variable.
73
Fred, AE6QL

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe
Subich, W4TV
Sent: Tuesday, November 24, 2015 9:31 AM
To: Robert Nobis; Elecraft
Subject: Re: [Elecraft] K3 Voltmeter calibration ...



You could easily drop 0.2 volts in the cable depending how long it
isand the gauge of the wire.


Not in six feet of #10 wire at 1.5A.  Even if it were #12 the voltage drop
should be less than 0.03V (1.62 Ohms/1000 feet for #12).

73,

 ... Joe, W4TV


On 11/24/2015 10:39 AM, Robert Nobis wrote:

Joe,

How long is your power cable from the RS-35A to your K3, and what gauge

wire is used?  You could easily drop 0.2 volts in the cable depending how
long it is and the gauge of the wire.


73,


Bob Nobis - N7RJN
n7...@nobis.net



On Nov 24, 2015, at 08:06, Joe Subich, W4TV  wrote:


OK, I'm sure I am overlooking something simple but I can not find (or
remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it back
on line I decided to double check the K3 Volts display against the
actual output of the supply.  The K3 is reading about 0.2V less than
the supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

... Joe, W4TV

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Re: [Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

I've already set ADC REF as documented in the manual.  The Voltage is
still off.  There should be a procedure to set the voltage as there was
when I assembled this K3 (s/n 1450) several years ago.  Unfortunately,
I can no longer find it in the current Owner's Manual or Assembly
Manual.

73,

  ... Joe, W4TV


On 11/24/2015 4:01 PM, Brian & Cyndi wrote:

Joe, if you just want to make the K3's voltmeter match your "known good"
reference meter, you need to adjust the "ADC REF" value.

Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF"
setting.  Note what it is before changing anything, in case this
adjustment affects anything else adversely.  Adjust the ADC REF value to
cause the voltmeter display to read the value you want. You will need to
go in and out of the menu display to see the results (kinda clumsy).

Again, this adjustment may affect other measurements, so an accurate K3
voltmeter may not be that important after all.

73,
Brian, W6FVI

On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:


It matters not if there is a series diode.  The Voltmeter should
be calibrated to the input power.  I remember that being the case
when I assembled my first K3.

73,

   ... Joe, W4TV


On 11/24/2015 11:02 AM, Michael Blake wrote:

Joe, is there not at least one diode junction or solid state switch
in series with the input power inside the K3?

Michael Blake - K9JRI





On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV 
wrote:


OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it back on
line I decided to double check the K3 Volts display against the actual
output of the supply.  The K3 is reading about 0.2V less than the
supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

   ... Joe, W4TV

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Re: [Elecraft] K3 Voltmeter calibration ...

[Edward R Cole]

Just checked my K3/10 and it displays 13.7 with 13.73v measured where 
the power cable is attached to my power distribution.  Negligible 
voltage drop in Elecraft supplied power cord when in Rx which displays 1.01a.


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

You could easily drop 0.2 volts in the cable depending how long it
isand the gauge of the wire.


Not in six feet of #10 wire at 1.5A.  Even if it were #12 the voltage
drop should be less than 0.03V (1.62 Ohms/1000 feet for #12).

73,

   ... Joe, W4TV


On 11/24/2015 10:39 AM, Robert Nobis wrote:

Joe,

How long is your power cable from the RS-35A to your K3, and what gauge wire is 
used?  You could easily drop 0.2 volts in the cable depending how long it is 
and the gauge of the wire.

73,


Bob Nobis - N7RJN
n7...@nobis.net



On Nov 24, 2015, at 08:06, Joe Subich, W4TV  wrote:


OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it back on
line I decided to double check the K3 Volts display against the actual
output of the supply.  The K3 is reading about 0.2V less than the
supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

   ... Joe, W4TV

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Re: [Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

It matters not if there is a series diode.  The Voltmeter should
be calibrated to the input power.  I remember that being the case
when I assembled my first K3.

73,

   ... Joe, W4TV


On 11/24/2015 11:02 AM, Michael Blake wrote:

Joe, is there not at least one diode junction or solid state switch in series 
with the input power inside the K3?

Michael Blake - K9JRI





On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV  wrote:


OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it back on
line I decided to double check the K3 Volts display against the actual
output of the supply.  The K3 is reading about 0.2V less than the
supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

   ... Joe, W4TV

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[Elecraft] P3 Showing Transmit Signal

[Bud Governale]

I noticed this weekend that occasionally during transmit instead of the scan 
freezing in place it would continue scanning showing only my transmit signal 
with only that signal appearing in the black waterfall.


I don't have the P3TXMON. It never did this before.

I was viewing the external SVGA monitor.

Any idea why?

73,

Bud W3LL





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Re: [Elecraft] 80w 2m amp sales

[Edward R Cole]

January orders closed with five assembled and one kit 
ordered.  Ordering is open for later production (February+)

http://www.kl7uw.com/kits.htm


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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[Elecraft] US Spot Counts...

[David Cole]

Hi,

Please forgive a slightly off topic post here...

I have just added US Spot counts by hour, for all bands as an aid to
knowing when the band is open, to my web page.

See:

http://nk7z.net/prorogation/cluster-spot-counts/


-- 
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net

For MixW support see;
http://groups.yahoo.com/neo/groups/mixw/info
For Dopplergram information see:
http://groups.yahoo.com/neo/groups/dopplergram/info
For MM-SSTV see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info



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Re: [Elecraft] For Sale KAT500 Auto Tuner - SOLD

[Javier Campos]

The KAT500 is now sold/spoken for.
Thanks
Javier 


On Monday, November 23, 2015 6:33 PM, Javier Campos 
 wrote:
 

 I am making some changes to  the station and my Elecraft KAT500 is excess to 
my needs.
Elecraft KAT500 High Power Auto Antenna Tuner SN#962 about 2.5 years old. 
Excellent condition, 9 out of 10, I used it with my Kenwood TS590s and my soon 
to be retired ACOM 1011 HF Amplifier. (If interested in the amplifier, drop me 
an email/call me).  Tunes great, never pushed beyond the ACOM 1011 limits of ~ 
650 watts. It tuned my Zero Five 30' Flag Pole without issues. Asking $500 
Shipped Paypal OK or USPS Money Order/Cashiers Check . 
Item is located in McKinney, TX, about 35 miles north of Dallas.
Regards,
Javier NM6E/5Cell: 707-799-1748
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Re: [Elecraft] K3 Voltmeter calibration ...

[Brian & Cyndi]

And the info below is what I found in Fred Cady's book on the K3. There 
is no other "calibration" for voltage in that book.


Until Don Wilhelm or Wayne Burdick chimes in,  I suspect there may not 
be any other adjustment available.


73,
Brian, W6FVI

On 11/24/2015 1:49 PM, Joe Subich, W4TV wrote:


I've already set ADC REF as documented in the manual.  The Voltage is
still off.  There should be a procedure to set the voltage as there was
when I assembled this K3 (s/n 1450) several years ago. Unfortunately,
I can no longer find it in the current Owner's Manual or Assembly
Manual.

73,

  ... Joe, W4TV


On 11/24/2015 4:01 PM, Brian & Cyndi wrote:

Joe, if you just want to make the K3's voltmeter match your "known good"
reference meter, you need to adjust the "ADC REF" value.

Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF"
setting.  Note what it is before changing anything, in case this
adjustment affects anything else adversely.  Adjust the ADC REF value to
cause the voltmeter display to read the value you want. You will need to
go in and out of the menu display to see the results (kinda clumsy).

Again, this adjustment may affect other measurements, so an accurate K3
voltmeter may not be that important after all.

73,
Brian, W6FVI

On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:


It matters not if there is a series diode.  The Voltmeter should
be calibrated to the input power.  I remember that being the case
when I assembled my first K3.

73,

   ... Joe, W4TV


On 11/24/2015 11:02 AM, Michael Blake wrote:

Joe, is there not at least one diode junction or solid state switch
in series with the input power inside the K3?

Michael Blake - K9JRI





On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV 
wrote:


OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it 
back on
line I decided to double check the K3 Volts display against the 
actual

output of the supply.  The K3 is reading about 0.2V less than the
supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

   ... Joe, W4TV

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Re: [Elecraft] K3 Voltmeter calibration ...

[Mark E. Musick]

I sent Joe K3 manual REV D6 from early in 2010.
On page 53 of that manual it has the following description for ADC REF and
how to calibrate it.

ADC REF

Allows calibration of the voltage reference used by the K3 to measure and
display
certain values, such as the rig's supply voltage. (Optional.) First,
disconnect
anything attached to the ACC jack. Next, locate the ADC REF menu entry. It
will
initially show 5.00 volts as the reference voltage. Using a DMM set to DC
volts,
measure the actual voltage at pin 2 of the ACC jack. This must be done while
the
ADC REF parameter is being displayed. (Note: The (-) probe of the DMM
should go to the K3's chassis ground, e.g. at the GROUND lug.) Finally, use
VFO
A to set the ADC REF menu parameter to what you measured at pin 2.

So you need to set ADC REF to the voltage on pin 2 of the ACC jack. NOT what
is at the APP connection on the RF board.

73,

Mark Musick, WB9CIF

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian
& Cyndi
Sent: Tuesday, November 24, 2015 11:19 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Voltmeter calibration ...

And the info below is what I found in Fred Cady's book on the K3. There is
no other "calibration" for voltage in that book.

Until Don Wilhelm or Wayne Burdick chimes in,  I suspect there may not be
any other adjustment available.

73,
Brian, W6FVI

On 11/24/2015 1:49 PM, Joe Subich, W4TV wrote:
>
> I've already set ADC REF as documented in the manual.  The Voltage is 
> still off.  There should be a procedure to set the voltage as there 
> was when I assembled this K3 (s/n 1450) several years ago. 
> Unfortunately, I can no longer find it in the current Owner's Manual 
> or Assembly Manual.
>
> 73,
>
>   ... Joe, W4TV
>
>
> On 11/24/2015 4:01 PM, Brian & Cyndi wrote:
>> Joe, if you just want to make the K3's voltmeter match your "known good"
>> reference meter, you need to adjust the "ADC REF" value.
>>
>> Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF"
>> setting.  Note what it is before changing anything, in case this 
>> adjustment affects anything else adversely.  Adjust the ADC REF value 
>> to cause the voltmeter display to read the value you want. You will 
>> need to go in and out of the menu display to see the results (kinda
clumsy).
>>
>> Again, this adjustment may affect other measurements, so an accurate 
>> K3 voltmeter may not be that important after all.
>>
>> 73,
>> Brian, W6FVI
>>
>> On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:
>>>
>>> It matters not if there is a series diode.  The Voltmeter should be 
>>> calibrated to the input power.  I remember that being the case when 
>>> I assembled my first K3.
>>>
>>> 73,
>>>
>>>... Joe, W4TV
>>>
>>>
>>> On 11/24/2015 11:02 AM, Michael Blake wrote:
 Joe, is there not at least one diode junction or solid state switch 
 in series with the input power inside the K3?

 Michael Blake - K9JRI




> On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV 
> wrote:
>
>
> OK, I'm sure I am overlooking something simple but I can not find 
> (or remember) how to calibrate the voltage display in the K3.
>
> I had to repair one of my Astron RS-35A power supplies for the 
> first time in 30 years (one of the diodes shorted) and when I put 
> it back on line I decided to double check the K3 Volts display 
> against the actual output of the supply.  The K3 is reading about 
> 0.2V less than the supply voltage.
>
> I've been over both the K3 Owner's Manual and the K3 Assembly 
> Instructions but can't find any reference to calibrating the 
> voltage display.
>
> 73,
>
>... Joe, W4TV
>
> __
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> This list hosted by: http://www.qsl.net Please help support this 
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> k9...@mac.com


>>> __
>>> Elecraft mailing list
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>>> w6...@sbcglobal.net
>>>
>>
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>> email list: http://www.qsl.net/donate.html Message delivered to 

Re: [Elecraft] RFI in audio chain

[Joe Subich, W4TV]

You have now eliminated the problem from causes in your station
layout and the antenna/feedline to the K3 - as the complete same
using the 730 works fine. True?


Not true ... the Icom uses an electret mic, not the dynamic Audio-
Technica.  If the microphone is wired correctly, the issue is in
the antenna system and probably requires improved common mode
decoupling.  Air wound solenoidal chokes are not sufficient in
the most intractable cases *like elevated verticals*.

Replace the elevated vertical with a dummy load.  If the RFI is
eliminated, the problem is in the antenna system.

73,

  ... Joe, W4TV


On 11/24/2015 7:00 AM, Bill wrote:

1. I have printed out Joe's directions and placed them in the K3 file -
for future reference.
2. Is you K3's chassis connector OK - loose ground?
3. Have a proper ground from the K3 to your station ground?
4. You are using the same feedline to test the K3 as used to test the
730? If not - do so. Everything needs to be eliminated.

You have now eliminated the problem from causes in  your station layout
and the antenna/feedline to the K3 - as the complete same using the 730
works fine. True? Then the problem is with the K3 or something attached
to it.

5. Disconnect everything from it except power, antenna, and mic. Test
it. All clear - the RF is coming in on something other than the mic
(plugged into the K3). Problem still there?
6. At this point, try an alternate mic and see if it works. If it works
good - the problem is the mic/mic wire/connector. If it does not and you
still have RFI - walk away for a while and cool down.

Just a few simple steps that would apply to any radio in a similar
situation.

Bill W2BLC K-Line



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[Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

OK, I'm sure I am overlooking something simple but I can not find
(or remember) how to calibrate the voltage display in the K3.

I had to repair one of my Astron RS-35A power supplies for the first
time in 30 years (one of the diodes shorted) and when I put it back on
line I decided to double check the K3 Volts display against the actual
output of the supply.  The K3 is reading about 0.2V less than the
supply voltage.

I've been over both the K3 Owner's Manual and the K3 Assembly
Instructions but can't find any reference to calibrating the voltage
display.

73,

   ... Joe, W4TV

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Re: [Elecraft] Using X-lock to stabilize PLL osc??

[N2PD]

It does appear that there is significant drift in the BFO.  I'm going to make
more exact measurements.  It seems to me that I read an old post from Wayne
or Eric (when they announced the BFO mod) that said they would be
experimenting with N750 caps in the BFO, but never saw anything about the
results.  Perhaps I will go that route and try to stabilize the BFO first. 
Maybe between that and careful selection of RA on the thermistor board (to
stabilize the PLL) I can achieve some improvement.  Just a note...the rig
doesn't drift excessively and is probably within spec, but there is room for
improvement



-
Paul, N2PD
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Re: [Elecraft] RFI in audio chain

[Bill]

1. I have printed out Joe's directions and placed them in the K3 file - 
for future reference.

2. Is you K3's chassis connector OK - loose ground?
3. Have a proper ground from the K3 to your station ground?
4. You are using the same feedline to test the K3 as used to test the 
730? If not - do so. Everything needs to be eliminated.


You have now eliminated the problem from causes in  your station layout 
and the antenna/feedline to the K3 - as the complete same using the 730 
works fine. True? Then the problem is with the K3 or something attached 
to it.


5. Disconnect everything from it except power, antenna, and mic. Test 
it. All clear - the RF is coming in on something other than the mic 
(plugged into the K3). Problem still there?
6. At this point, try an alternate mic and see if it works. If it works 
good - the problem is the mic/mic wire/connector. If it does not and you 
still have RFI - walk away for a while and cool down.


Just a few simple steps that would apply to any radio in a similar 
situation.


Bill W2BLC K-Line



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Re: [Elecraft] KX3 VSWR problem

[James Rodenkirch]

WD4SDC wrote
 Equipment: KX3 S/N 7210, FW 02.25

Problem:
6M band -> VSWR 1.8:1 (KX3 meter) on 50ohm load connected directly to ant
 connector (no cable).

Followed by this UPDATE:
The test was to disconnect the remove the ATU board and connect the RF board 
directly to
the antenna port - which worked OK - 1.2:1.  With ATU installed and
auto-tuned, I get 10 watts delivered to the load, so in my case the bypass
VSWR is little high, but not really a concern.  Since the ATU *is*
installed, just tune it and everything works fine.


I'm not sure I understand..are you saying with the ATU removed the VSWR is 
1.2:1 and with it

installed but not tuned it's 1.8:1 until the ATU "kicks in and does its job???


72 de Jim R. K9JWV

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Re: [Elecraft] K3 KIO3

[Cady, Fred]

As I understand it, the P3 and the K3 communicate at 38400 only so you need to 
leave the K3 at 38400.  However if you have an application that needs to 
communicate with the K3 as some other baud, for example 9600, you can set the 
P3's rate to that and the application, like the utility, will happily think it 
is talking to the K3 at 9600.
Cheers and 73,
Fred KE7X

For all KE7X Elecraft books see www.ke7x.com


From: Elecraft  on behalf of Per-Tore 
Aasestrand 
Sent: Tuesday, November 24, 2015 5:59 AM
To: Mike Reublin NF4L
Cc: Elecraft List
Subject: Re: [Elecraft] K3 KIO3

The P3 translates the speed of the K3.
Both K3 & P3 should be set to the same baudrate for performance reason.

P-T
LA7NO


On 24 November 2015 at 13:54, Mike Reublin NF4L  wrote:

> I'm writing a Windows program for the K3. It connects at 38400 only. In
> trying to figure out what's wrong, I set my P3 and K3 to 9600 and used the
> K3 Utility. It will not connect.
>
> If I set the K3 to 38400 and leave the P3 at 9600, the utility connects,
> but reports it's connected at 9600.
>
> Puzzlement is rampant.
>
> 73, Mike NF4L
>
>
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Re: [Elecraft] K3 KIO3

[Mike Reublin NF4L]

Not the issue. The post was meant for support, not the list. Mea culpa!

73, Mike NF4L


> On Nov 24, 2015, at 7:59 AM, Per-Tore Aasestrand  wrote:
> 
> The P3 translates the speed of the K3.
> Both K3 & P3 should be set to the same baudrate for performance reason.
> 
> P-T
> LA7NO
> 
> 
> On 24 November 2015 at 13:54, Mike Reublin NF4L  > wrote:
> I'm writing a Windows program for the K3. It connects at 38400 only. In 
> trying to figure out what's wrong, I set my P3 and K3 to 9600 and used the K3 
> Utility. It will not connect.
> 
> If I set the K3 to 38400 and leave the P3 at 9600, the utility connects, but 
> reports it's connected at 9600.
> 
> Puzzlement is rampant.
> 
> 73, Mike NF4L
> 
> 
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Re: [Elecraft] EXT ALC with KPA-500

[Mike K2MK]

Hi David,

Not needed. Leave it OFF.

73,
Mike K2MK


David Winarsky wrote
> Hi,
> 
> Long time reader, first time poster here. I really enjoy this list and
> have found countless solutions here.  I'm new to the full k-line I've read
> through both manuals and previous posts, but haven't been able to find a
> clear indication on the below:
> 
> I'm running the K3S alongside the KPA-500 and its not clear to me whether
> I should enable EXT ALC in the config options on the K3?  I need to enable
> the Tech Mode option on the k3 to even get at the setting, so I'm taking
> this as a clue it's not needed, however I'm not sure?
> 
> Appreciate any help!
> 
> 73, David





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[Elecraft] K3 KIO3

[Mike Reublin NF4L]

I'm writing a Windows program for the K3. It connects at 38400 only. In trying 
to figure out what's wrong, I set my P3 and K3 to 9600 and used the K3 Utility. 
It will not connect.

If I set the K3 to 38400 and leave the P3 at 9600, the utility connects, but 
reports it's connected at 9600.

Puzzlement is rampant.
 
73, Mike NF4L


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Re: [Elecraft] K3 KIO3

[Per-Tore Aasestrand]

The P3 translates the speed of the K3.
Both K3 & P3 should be set to the same baudrate for performance reason.

P-T
LA7NO


On 24 November 2015 at 13:54, Mike Reublin NF4L  wrote:

> I'm writing a Windows program for the K3. It connects at 38400 only. In
> trying to figure out what's wrong, I set my P3 and K3 to 9600 and used the
> K3 Utility. It will not connect.
>
> If I set the K3 to 38400 and leave the P3 at 9600, the utility connects,
> but reports it's connected at 9600.
>
> Puzzlement is rampant.
>
> 73, Mike NF4L
>
>
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Re: [Elecraft] K3 KIO3

[Mike Reublin NF4L]

Thanks, Fred -

The issue is that nothing talks to the K3 at any rate other than 38400. The 
post was meant for support, but the list is often a tad faster.

73, Mike NF4L


> On Nov 24, 2015, at 8:09 AM, Cady, Fred  wrote:
> 
> As I understand it, the P3 and the K3 communicate at 38400 only so you need 
> to leave the K3 at 38400.  However if you have an application that needs to 
> communicate with the K3 as some other baud, for example 9600, you can set the 
> P3's rate to that and the application, like the utility, will happily think 
> it is talking to the K3 at 9600.
> Cheers and 73,
> Fred KE7X
> 
> For all KE7X Elecraft books see www.ke7x.com
> 
> 
> From: Elecraft  on behalf of Per-Tore 
> Aasestrand 
> Sent: Tuesday, November 24, 2015 5:59 AM
> To: Mike Reublin NF4L
> Cc: Elecraft List
> Subject: Re: [Elecraft] K3 KIO3
> 
> The P3 translates the speed of the K3.
> Both K3 & P3 should be set to the same baudrate for performance reason.
> 
> P-T
> LA7NO
> 
> 
> On 24 November 2015 at 13:54, Mike Reublin NF4L  wrote:
> 
>> I'm writing a Windows program for the K3. It connects at 38400 only. In
>> trying to figure out what's wrong, I set my P3 and K3 to 9600 and used the
>> K3 Utility. It will not connect.
>> 
>> If I set the K3 to 38400 and leave the P3 at 9600, the utility connects,
>> but reports it's connected at 9600.
>> 
>> Puzzlement is rampant.
>> 
>> 73, Mike NF4L
>> 
>> 
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Re: [Elecraft] K3 Voltmeter calibration ...

[Robert Nobis]

Joe,

How long is your power cable from the RS-35A to your K3, and what gauge wire is 
used?  You could easily drop 0.2 volts in the cable depending how long it is 
and the gauge of the wire.

73,


Bob Nobis - N7RJN
n7...@nobis.net


> On Nov 24, 2015, at 08:06, Joe Subich, W4TV  wrote:
> 
> 
> OK, I'm sure I am overlooking something simple but I can not find
> (or remember) how to calibrate the voltage display in the K3.
> 
> I had to repair one of my Astron RS-35A power supplies for the first
> time in 30 years (one of the diodes shorted) and when I put it back on
> line I decided to double check the K3 Volts display against the actual
> output of the supply.  The K3 is reading about 0.2V less than the
> supply voltage.
> 
> I've been over both the K3 Owner's Manual and the K3 Assembly
> Instructions but can't find any reference to calibrating the voltage
> display.
> 
> 73,
> 
>   ... Joe, W4TV
> 
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Re: [Elecraft] K3 Voltmeter calibration ...

[Michael Blake]

Joe, is there not at least one diode junction or solid state switch in series 
with the input power inside the K3?

Michael Blake - K9JRI




> On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV  wrote:
> 
> 
> OK, I'm sure I am overlooking something simple but I can not find
> (or remember) how to calibrate the voltage display in the K3.
> 
> I had to repair one of my Astron RS-35A power supplies for the first
> time in 30 years (one of the diodes shorted) and when I put it back on
> line I decided to double check the K3 Volts display against the actual
> output of the supply.  The K3 is reading about 0.2V less than the
> supply voltage.
> 
> I've been over both the K3 Owner's Manual and the K3 Assembly
> Instructions but can't find any reference to calibrating the voltage
> display.
> 
> 73,
> 
>   ... Joe, W4TV
> 
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