Re: [Elecraft] K3 displayed power out is incorrect

[Keith Trinity WE6R]

Hi Gary;
Look in from with the top off at the RF board where the KAT3 or KANT3 
board plugs in.
Check T4 for darkening, it gets cooked if DC is applied to the antenna 
connector (like a remote preamp power connected backwards or similar).

You mentioned a remote tuner? Does it get power up the coax?
T4 is our# E690126, FT37-61x2,18T #26,PREWND


Also we went to beefier D36 somewhere in the early serial # range. 
Suggest shotgun replacing them if you don't find anything burnt.

They are on the bottom just opposite the KAT3/KANT3.
Our part # E560048 BAS70 Diode, 70V, SOT23 Infineon  BAS 70 E6327    
Digi-Key    BAS70INTR-ND


You mentioned arcing, if in the K3, it is most likely the SA1 spark 
arrestor on the KAT3 or KANT3 board.

With the top off, watch for it glowing when running higher power.
Our #   E980130  SURGE ARSTR,350VDC,800V PULSE    Digikey 495-1879-ND

When you get it fixed, you will want to run the TX gain cal again, and 
after that, remember to never transmit at exactly 1.0MW, 5.0 or 50watts!
It will cause an inadvertent manual TX gain cal that can mess up the 
gain cal.

Keith WE6R K3/K4 Tech
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Re: [Elecraft] K3 displayed power out is incorrect

[Michael Carter via Elecraft]

Hi Gary,

The K3 computes forward and reflected power
from samples taken in the SWR bridge circuit.
A Tif X Gain calibration could fail because the
forward power reading is incorrect due to
a failure in that portion of the SWR bridge
circuit.

Do you have the KAT3 ATU in your K3?
If so, be sure that you select BYPASS
using the ATU TUNE button on the
front panel.  The K3 Utility will do this
automatically on each band if
you run a TX Gain Calibration via the
Utility.

Unfortunately, with the exception of two
51 ohm bridge termination resistors on the top side of the RF board,
the remaining bridge components are on the underside
of that board.  You can access them by removing
the rear bottom cover, but DO NOT key the transmitter
while the cover is off because it will kill the driver
transistors in the Low Power Amp assembly.

I would check diodes D36 and D37 on the RF
board first, which form the RF detectors for the
forward and reverse power metering circuits, respectively.
Those diodes are DC forward biased and should show a
forward voltage drop of perhaps 0.3-0.4 V when
sitting idle (transmitter NOT keyed).

If those diodes are OK, then it gets more tricky to
troubleshoot the SWR bridge without access to
the bottom side of the RF board (DO put the rear
bottom cover back in place before any further
testing proceeds!).  This is where Keith, WE6R,
the K3/K4 super-tech at Elecraft, should be
consulted about other possible failures in the
SWR bridge circuit.  There may be vias accessible
on the top side of the RF board that would enable
you to measure the VFWD and VREFL voltages
from U16 (op amp unity gain buffers), but I don't
know that level of detail without opening up
my K3 for careful inspection.

73,
Mike, K8CN


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[Elecraft] K3 displayed power out is incorrect

[Gary Hill via Elecraft]

During operation with a home-brew mag-loop antenna, my K3 (#1222) dropped power 
to just under 50W (by the display).  There had been an occasional arc in the 
external loop tuner, so I'm assuming that was the cause of the K3 failure.  
Subsequently, running the 50W TX Gain Calibration, some bands pass but other do 
not.  Pass-or-fail, however, power out on the dummy load shows more than 100W 
but K3's displayed power is on the order of 50W (definitely not right). Note 
that 5W TX Gain Calibration appears to work fine.  During normal keying from a 
straight key, output power (seen on dummy load) ramps up quickly with KPA in 
operation and I get 100W out (on dummy load) when K3 display shows 40W.  
Because I'm getting full power on the dummy load, I'm thinking this must be 
something simple like a blown resistor in the metering path or gain-control 
circuitry.  I get no error messages during operation and only get the TX Gain 
Failure message during calibration. I'd like to try a repair myself and would 
appreciate any counsel or direction.
Thanks,Gary, AA0CL
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Re: [Elecraft] K3 no power out

[Matthew Cook]

Josep,

After the basic checks that Dave and Fred have suggested, if you've not
seen any life I'd quickly check what happens if you turn the power down to
under 10W, this will bypass the KPA3 and if you still see no output then
the problem is deeper into the radio.  From here I'd talk to the folks over
on the Elecraft K3 support email address, they will be able to advise how
to pull the radio apart and make the necessary measurements.   Working back
through the power amplifier chain the next likely culprit is the 10W
amplifier, then the Local oscillator.

I went through something similar where my K3 intermittently refused to
transmit, typically when I'd taken it to a contest.  That one took me a
little longer to fix (faulty LO cable) than I'd care to admit, but your's
isn't intermittent by the sounds, so is a little easier to diagnose and
hopefully fix.

73

Matthew
VK5ZM


On Thu, 9 Feb 2023 at 01:19, Josep Torres via Elecraft <
elecraft@mailman.qth.net> wrote:

> Hi all,
>
> Bad news here…. My K3 (radio 1) is not transmitting power out.!!
> I have used this morning as I normally do and all was fine.
> Around 1330h local time, I turned it on again and did QSO with CT7/DJ2PR
> and all was fine. I let the radio on as the CWT contest started at 1400h
> local.
> When I started to operate the contest I realized that no power was going
> out so very disappointed, I swapped to my other K3 (radio 2).
> I really don’t know what have happened but the thing is that after trying
> for several times, no way, still no power out…
> I think I can hear a light click coming from the back left side.
>
> Any help please..? Thanks.
>
>
> 73,
>
> Josep
> EA6BF
> BUG #256  -  CWops #3072  -  FOC #2182 (ex 1724)
>
>
>
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Re: [Elecraft] K3 no power out

[Ed Cole]

A couple days ago I encountered that kind of issue:  I had the K3 in 
DATA mode "looking at the psk-31 mode" and went to shift back to USB, 
but the XMIT/TUNE button yielded no output.


Checked thru the list you provided and checked that I was in ANT1 output 
as I have run xvtr mode in the past.  No output into my KXPA100/KXAT100; 
no input to re-tune the ATU...huh?  Manually keying PTT switched the 
KXPA100 into tx.  So finally, I recycle the power button on the K3 and 
it resumed normal operation (TUNE worked; SSB worked, ta-da).


I have noted that changing bands with the K3/KXPA100 combo the ATU 
doesn't always recognize the freq shift (until I recycle power on the 
KXPA100).  I'm guessing that's because there is no control line from the 
K3 to the amp like what is used with the KX3 (which is really nice when 
mobile and amp is under the back seat).


Anyway sometimes recycling power works!

73, Ed - KL7UW


Josep,

Please check the obvious things:

1) Is 'test mode' on?
2) Is the power level turned to zero?
3) Is the VOX on (for CW)?
4) Are you using the right antenna selection?
5) Is your key plugged in/wiring OK?

I know some of this is really basic, but sometimes in the heat of
battle, something gets overlooked.

73,

-- Dave, N8SBE
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Re: [Elecraft] K3 no power out

[Fred Jensen]

Right on Dave, except that "simple" is a better term than "obvious."  My 
K3 is S/N 642 ... very long in the tooth now.  Perhaps 8 or 9 years ago 
30 m quit.  Just internal noise and infinite SWR.  All the other bands 
were fine.  After about 2 days of fooling with the myriad of connectors 
and cables behind the rigs [remember, it's called "wireless"], I posted 
a minor plea here.


A fellow with the call N6KR called [yes, THAT N6KR] and began helping me 
trouble shoot.  He said, "Let's start with the simple things ... which 
antenna is selected on the bands where it works?"  I told him ANT1.  
"OK," he said, "Now, which antenna is selected on 30 m?"  Everyone 
should be able to fill in the blanks from that point.


Elecraft radios remember a great number of settings, some globally, some 
on a mode and/or band basis.  W6RMK, my Elmer from 70 years ago told me, 
"When something fails, we nearly always believe it's caused by the worst 
possible thing that can happen.  It almost never is."


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Dave New, N8SBE wrote on 2/9/2023 11:58 AM:

Josep,

Please check the obvious things:

1) Is 'test mode' on?
2) Is the power level turned to zero?
3) Is the VOX on (for CW)?
4) Are you using the right antenna selection?
5) Is your key plugged in/wiring OK?

I know some of this is really basic, but sometimes in the heat of 
battle, something gets overlooked.


73,

-- Dave, N8SBE

On 2023-02-08 08:47, Josep Torres via Elecraft wrote:


Hi all,

Bad news here…. My K3 (radio 1) is not transmitting power out.!!
I have used this morning as I normally do and all was fine.
Around 1330h local time, I turned it on again and did QSO with
CT7/DJ2PR and all was fine. I let the radio on as the CWT contest
started at 1400h local.
When I started to operate the contest I realized that no power was
going out so very disappointed, I swapped to my other K3 (radio 2).
I really don't know what have happened but the thing is that after
trying for several times, no way, still no power out…
I think I can hear a light click coming from the back left side.

Any help please..? Thanks.

73,

Josep
EA6BF
BUG #256  -  CWops #3072  -  FOC #2182 (ex 1724)






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Re: [Elecraft] K3 no power out

[Dave New, N8SBE]

Josep,

Please check the obvious things:

1) Is 'test mode' on?
2) Is the power level turned to zero?
3) Is the VOX on (for CW)?
4) Are you using the right antenna selection?
5) Is your key plugged in/wiring OK?

I know some of this is really basic, but sometimes in the heat of 
battle, something gets overlooked.


73,

-- Dave, N8SBE

On 2023-02-08 08:47, Josep Torres via Elecraft wrote:


Hi all,

Bad news here…. My K3 (radio 1) is not transmitting power out.!!
I have used this morning as I normally do and all was fine.
Around 1330h local time, I turned it on again and did QSO with
CT7/DJ2PR and all was fine. I let the radio on as the CWT contest
started at 1400h local.
When I started to operate the contest I realized that no power was
going out so very disappointed, I swapped to my other K3 (radio 2).
I really don't know what have happened but the thing is that after
trying for several times, no way, still no power out…
I think I can hear a light click coming from the back left side.

Any help please..? Thanks.

73,

Josep
EA6BF
BUG #256  -  CWops #3072  -  FOC #2182 (ex 1724)

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[Elecraft] K3 no power out

[Josep Torres via Elecraft]

Hi all,

Bad news here…. My K3 (radio 1) is not transmitting power out.!!
I have used this morning as I normally do and all was fine. 
Around 1330h local time, I turned it on again and did QSO with CT7/DJ2PR and 
all was fine. I let the radio on as the CWT contest started at 1400h local. 
When I started to operate the contest I realized that no power was going out so 
very disappointed, I swapped to my other K3 (radio 2).
I really don’t know what have happened but the thing is that after trying for 
several times, no way, still no power out… 
I think I can hear a light click coming from the back left side. 

Any help please..? Thanks.


73,

Josep
EA6BF
BUG #256  -  CWops #3072  -  FOC #2182 (ex 1724)



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Re: [Elecraft] K3 50MHz power out

[Ray]

To measure RF  power accurately, it needs to be into a Known Impedance.
  I would run the RF Calibrate Test, in the K3 Utility program. 
Ray WA6VVAB K3

Sent from Mail for Windows

From: Josep via Elecraft
Sent: Monday, June 6, 2022 7:32 AM
To: Elecraft Reflector
Subject: [Elecraft] K3 50MHz power out

My K3 seems to send out ~50w (1.5:1 SWR) to the antenna. If I connect a dummy 
load, ~40w (1.1:1 SWR).Should it send out more RF power or this is what is 
expected.? I thought I read it should be something around 90w (?)
Any suggestions.?
Thanks,


73, 
JosepEA6BFMyWebsiteBUG #256  -  CWOps #3072  -  FOC #2182 (ex 1724)
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[Elecraft] K3 50MHz power out

[Josep via Elecraft]

My K3 seems to send out ~50w (1.5:1 SWR) to the antenna. If I connect a dummy 
load, ~40w (1.1:1 SWR).Should it send out more RF power or this is what is 
expected.? I thought I read it should be something around 90w (?)
Any suggestions.?
Thanks,


73, 
JosepEA6BFMyWebsiteBUG #256  -  CWOps #3072  -  FOC #2182 (ex 1724)
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Re: [Elecraft] k3 no power out over 12 watts

[Michael Carter]

Hi Scott,

Check the KPA3 settings in the CONFIG menu
to be sure the 100 watt PA is not bypassed.

If the KPA3 is set to PA NOR in the CONFIG
menu, then you may have a diode failure
in the PIN diode T/R switch or the PA bypass
PIN diode switch.

Mike, K8CN


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[Elecraft] k3 no power out over 12 watts

[NE9U - Scott Jasper]

Turned on my k3 couple days ago and I suddenly have no power out over 12 
watts.  Had been working fine prior to that.??


Tried running the power calibration routine.  5 watts calibration 
worked.  50 watts erred out.


rig is not in test mode.

any hints on anything to check?

--
Scott- NE9U

Sent from my Cray-1

skjaspe...@gmail.com
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n...@arrl.net


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[Elecraft] K3 No Power out 2M

[Ronnie Hull]

I recently got my K3 back from Elecraft after having an alignment and total 
checkout and some hardware upgrades
I have the 2M module installed. When attempting to use it yesterday on 2M FM 
and it’s only putting out 100mw’s!!!
Anyone know of a setting that needs to be checked? 
I hate to call Elecraft cuz they are so busy but I will if need be
Hoping for a simple fix here

Thanks in advance

Ronnie W5SUM 

Sent from my iPhone
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Re: [Elecraft] K3 No power out

[Bob Wilson, N6TV]

From the "Troubleshooting" section of the K3 manual:

*No power output*: You may have routed RF through the KXV3’s XVTR IN/OUT
jacks, either by switching
to a transverter band, or by setting CONFIG:KXV3 to TEST. Also try redoing
TX GAIN cal (pg. 49).

73,
Bob, N6TV

On Tue, Aug 14, 2018 at 9:29 PM, Don Roberts via Elecraft <
elecraft@mailman.qth.net> wrote:

> Yes I can set it at 35 watts which is what I usually use to drive the KPA
> 500, and speak in the mic for ssb and get no power out. In cw at the same
> 35 watts, when I send code either straight key or padfle. 0 watts out. Same
> results if I attempt to run bearfoot at 100 watts or 5 watts, I get no
> power out. Receive is working fine, the P3 is working normal, and the KPA
> 500 and KAT 500 track bands as I change them.
> I will try again tomorrow after a night of sleep. If still no go, will
> phone home to Elecraft
> Don, W4CBS
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Re: [Elecraft] K3 No power out

[Nr4c]

“Test” mode wouldn’t survive a power cycle I don’t believe. 

Sent from my iPhone
...nr4c. bill


> On Aug 15, 2018, at 7:25 AM, David Bunte  wrote:
> 
> Don -
> 
> If this was suggested before, I missed it and apologize for the redundancy.
> Has the rig inadvertently been put into the test mode? If the TX indicator
> under the VFO A box is blinking, that would explain the symptoms.
> 
> Dave - K9FN
> 
> On Wed, Aug 15, 2018 at 12:30 AM Don Roberts via Elecraft <
> elecraft@mailman.qth.net> wrote:
> 
>> Yes I can set it at 35 watts which is what I usually use to drive the KPA
>> 500, and speak in the mic for ssb and get no power out. In cw at the same
>> 35 watts, when I send code either straight key or padfle. 0 watts out. Same
>> results if I attempt to run bearfoot at 100 watts or 5 watts, I get no
>> power out. Receive is working fine, the P3 is working normal, and the KPA
>> 500 and KAT 500 track bands as I change them.
>> I will try again tomorrow after a night of sleep. If still no go, will
>> phone home to Elecraft
>> Don, W4CBS
>> 
>> Sent from Yahoo Mail on Android
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Re: [Elecraft] K3 No power out

[David Bunte]

Don -

If this was suggested before, I missed it and apologize for the redundancy.
Has the rig inadvertently been put into the test mode? If the TX indicator
under the VFO A box is blinking, that would explain the symptoms.

Dave - K9FN

On Wed, Aug 15, 2018 at 12:30 AM Don Roberts via Elecraft <
elecraft@mailman.qth.net> wrote:

> Yes I can set it at 35 watts which is what I usually use to drive the KPA
> 500, and speak in the mic for ssb and get no power out. In cw at the same
> 35 watts, when I send code either straight key or padfle. 0 watts out. Same
> results if I attempt to run bearfoot at 100 watts or 5 watts, I get no
> power out. Receive is working fine, the P3 is working normal, and the KPA
> 500 and KAT 500 track bands as I change them.
> I will try again tomorrow after a night of sleep. If still no go, will
> phone home to Elecraft
> Don, W4CBS
>
> Sent from Yahoo Mail on Android
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Re: [Elecraft] K3 No power out

[Jim Blanca]

Don,
Have you tried transmitting at 10 watts, and do you get RF output?  Do you
also loose receive when you pass the 12 watt threshold? If you have any of
these symptoms, good chance it’s a PIN T/R malfunction.

My beloved K3 was doing the same thing... one day she was running like a
champ, next day the high power amp up and quite.  She is now back at the
mothership being revived.  Fortunately, I have another K3 and K3s to put in
line.

Good luck in resuscitating her!

73 de Jim - KE8G

On Tue, Aug 14, 2018 at 8:19 PM Don Roberts via Elecraft <
elecraft@mailman.qth.net> wrote:

> I have enjoyed the wisdom of this group and have learned so much but now
> it is my time to ask for help. My K3 is showing no power out. I have the K
> line. The relay clicks when going from 11 to 12 watts. I can set the power
> up to 110, but when I hit tune I get zere watts shown and verified by my
> watt meters. Makes no difference of mode, band, dummy load, resonant ant,
> or multiband hex beam, 80 meter horizontal loop, or 40 meter vertical.
> There is no output to tune anything.
> My last contacts showed no problems. Worked 10 meter cw, 20 and 6 meter
> ssb ok just two days ago.  It seems to be receiving fine. The P3 display is
> normal, the KAT 500 and KPA 500 change bands with the K3 as they normally
> do. I have rebooted the K3 several times and have killed the master AC
> power to everything only to bring it up to the same thing. The ALC,
> compression, mic gain all register correct, where I always run them. I have
> checked to make sure the Test button has not been ingaged. Press XMIT and
> all I get is 0 W.  I am sure I have forgotten something simple. Would
> appreciate any help.  Thanks
> 73, Don W4CBS
>
> Sent from Yahoo Mail on Android
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[Elecraft] K3 No power out

[Don Roberts via Elecraft]

Yes I can set it at 35 watts which is what I usually use to drive the KPA 500, 
and speak in the mic for ssb and get no power out. In cw at the same 35 watts, 
when I send code either straight key or padfle. 0 watts out. Same results if I 
attempt to run bearfoot at 100 watts or 5 watts, I get no power out. Receive is 
working fine, the P3 is working normal, and the KPA 500 and KAT 500 track bands 
as I change them.
I will try again tomorrow after a night of sleep. If still no go, will phone 
home to Elecraft
Don, W4CBS

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Re: [Elecraft] K3 No power out

[Mike Flowers]

Elecraft service set my Tune Pwr to 5.1 watts to prevent ‘inadvertent running 
of TX gain calibration’. 

Have you tried running the TX gain calibration with the K3 Utility?

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

> On Aug 14, 2018, at 5:31 PM, Dennis Moore  wrote:
> 
> "No power to tune anything." Does this mean you've only tried to tune, and 
> haven't tried actually transmitting cw or phone? If so, and I don't know how 
> it would have changed, have you checked the Menu-Config-TUN PWR to see what 
> it is set to? If it is set to .1 it will show 0.0
> 
> 73, Dennis NJ6G
> 
> 
>> On 8/14/2018 17:19, Don Roberts via Elecraft wrote:
>> I have enjoyed the wisdom of this group and have learned so much but now it 
>> is my time to ask for help. My K3 is showing no power out. I have the K 
>> line. The relay clicks when going from 11 to 12 watts. I can set the power 
>> up to 110, but when I hit tune I get zere watts shown and verified by my 
>> watt meters. Makes no difference of mode, band, dummy load, resonant ant, or 
>> multiband hex beam, 80 meter horizontal loop, or 40 meter vertical. There is 
>> no output to tune anything.
>> My last contacts showed no problems. Worked 10 meter cw, 20 and 6 meter ssb 
>> ok just two days ago.  It seems to be receiving fine. The P3 display is 
>> normal, the KAT 500 and KPA 500 change bands with the K3 as they normally 
>> do. I have rebooted the K3 several times and have killed the master AC power 
>> to everything only to bring it up to the same thing. The ALC, compression, 
>> mic gain all register correct, where I always run them. I have checked to 
>> make sure the Test button has not been ingaged. Press XMIT and all I get is 
>> 0 W.  I am sure I have forgotten something simple. Would appreciate any 
>> help.  Thanks
>> 73, Don W4CBS
> 
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Re: [Elecraft] K3 No power out

[Dennis Moore]

"No power to tune anything." Does this mean you've only tried to tune, 
and haven't tried actually transmitting cw or phone? If so, and I don't 
know how it would have changed, have you checked the Menu-Config-TUN PWR 
to see what it is set to? If it is set to .1 it will show 0.0


73, Dennis NJ6G


On 8/14/2018 17:19, Don Roberts via Elecraft wrote:

I have enjoyed the wisdom of this group and have learned so much but now it is 
my time to ask for help. My K3 is showing no power out. I have the K line. The 
relay clicks when going from 11 to 12 watts. I can set the power up to 110, but 
when I hit tune I get zere watts shown and verified by my watt meters. Makes no 
difference of mode, band, dummy load, resonant ant, or multiband hex beam, 80 
meter horizontal loop, or 40 meter vertical. There is no output to tune 
anything.
My last contacts showed no problems. Worked 10 meter cw, 20 and 6 meter ssb ok 
just two days ago.  It seems to be receiving fine. The P3 display is normal, 
the KAT 500 and KPA 500 change bands with the K3 as they normally do. I have 
rebooted the K3 several times and have killed the master AC power to everything 
only to bring it up to the same thing. The ALC, compression, mic gain all 
register correct, where I always run them. I have checked to make sure the Test 
button has not been ingaged. Press XMIT and all I get is 0 W.  I am sure I have 
forgotten something simple. Would appreciate any help.  Thanks
73, Don W4CBS


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[Elecraft] K3 No power out

[Don Roberts via Elecraft]

I have enjoyed the wisdom of this group and have learned so much but now it is 
my time to ask for help. My K3 is showing no power out. I have the K line. The 
relay clicks when going from 11 to 12 watts. I can set the power up to 110, but 
when I hit tune I get zere watts shown and verified by my watt meters. Makes no 
difference of mode, band, dummy load, resonant ant, or multiband hex beam, 80 
meter horizontal loop, or 40 meter vertical. There is no output to tune 
anything.
My last contacts showed no problems. Worked 10 meter cw, 20 and 6 meter ssb ok 
just two days ago.  It seems to be receiving fine. The P3 display is normal, 
the KAT 500 and KPA 500 change bands with the K3 as they normally do. I have 
rebooted the K3 several times and have killed the master AC power to everything 
only to bring it up to the same thing. The ALC, compression, mic gain all 
register correct, where I always run them. I have checked to make sure the Test 
button has not been ingaged. Press XMIT and all I get is 0 W.  I am sure I have 
forgotten something simple. Would appreciate any help.  Thanks
73, Don W4CBS

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[Elecraft] K3 6M power out

[Mark N2QT via Elecraft]

Is it normal for the 6M output to be about 10 watts less than indicated (i.e. 
90w for 100w
setting).  If I do the 50w wattmeter cal on 20 M all bands but 6 are pretty 
much right on.
Conversely if I cal on 6 then all the lower bands are (not surprisingly) 10 
watts high. 

Mark. N2QT
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Re: [Elecraft] K3 - No Power Out, Error Message "ERR PL-1"

[Don Wilhelm]

Ed,

Turn to page 70 in the K3 manual and try the correction steps listed for 
the ERR PL-1 error.


If that does not correct it, contact K3support for further steps.

73,
Don W3FPR

On 6/21/2017 8:53 AM, Ed Gilliland wrote:

No power out

5W calibration fails

The error message "ERR PL-1" appears briefly when I change bands.


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[Elecraft] K3 - No Power Out, Error Message "ERR PL-1"

[Ed Gilliland]

No power out

5W calibration fails

The error message "ERR PL-1" appears briefly when I change bands.

Thanks for the help.

Ed

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Re: [Elecraft] [K3] No Power out, no sigs in

[Geoff Allsup]

I had similar trouble related to the synthesizer boards on a K3. On the newer 
KSYN3A boards there is a green LED on the top edge of the board that should be 
ON if the board is working ok. You mentioned a sub RX so you should have two of 
these boards mounted against the back of the front panel.  

In any case, if the main KSYN3 board dies, everything acts as you've described. 
If the sub RX KSYN3 board dies, only the sub RX is affected. So there is a 
chance you could swap the KSYN3 boards and bring the main K3 back to life at 
the expense of no sub RX. 

Just a thought - bit of a pain to swap those boards. 

Geoff - W1OH 



Sent from my iPhone

Geoff Allsup, W1OH   gall...@whoi.edu or w...@whoi.edu
Senior Engineer Upper Ocean Processes Group
Woods Hole Oceanographic InstitutionWoods Hole, MA


> On Apr 15, 2017, at 19:33, Martin  wrote:
> 
> Elecrafters,
> i'm on vacation at a /p qth and K3 #2878 has quit working.
> I have no power out. The display reads 0.0 watts when holding the tune 
> button, regardless of mode.
> In RX I hear noise from the headphones , but no signals. The noise sounds 
> like the K3 sounds when no antenna is attached.
> 
> I attached my antenna to RX-IN , no joy
> Also no signals on SUB-RX.
> 
> The only measurement gear i have right now is an ohmmeter and a powermeter.
> I have no programming cable right now.
> 
> I should have mentioned that i had power out briefly. but the cable of the 
> headphones was very close to the ladderline , in fact touched it, when i 
> checked match by holding TUNE.
> 
> Any advice what to check?
> 
> -- 
> 
> 73, Martin
> 
> Ohne CW ist es nur CB...
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[Elecraft] [K3] No Power out, no sigs in

[Martin]

Elecrafters,
i'm on vacation at a /p qth and K3 #2878 has quit working.
I have no power out. The display reads 0.0 watts when holding the tune 
button, regardless of mode.
In RX I hear noise from the headphones , but no signals. The noise 
sounds like the K3 sounds when no antenna is attached.


I attached my antenna to RX-IN , no joy
Also no signals on SUB-RX.

The only measurement gear i have right now is an ohmmeter and a powermeter.
I have no programming cable right now.

I should have mentioned that i had power out briefly. but the cable of 
the headphones was very close to the ladderline , in fact touched it, 
when i checked match by holding TUNE.


Any advice what to check?

--

73, Martin

Ohne CW ist es nur CB...
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Re: [Elecraft] K3 No power out and no receive

[Don Wilhelm]

The manual indicates that you should contact K3 support and give then 
that number.


73,
Don W3FPR

On 9/30/2015 8:59 AM, way235 wrote:

This is a K3 kit and is 6 months old bought April this year.  I am going back
thru initial setup and getting E 00044  ERR VC4 in calibration both A and B
VCO. at this time.  Worked perfect until yesterday.



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Re: [Elecraft] K3 No power out and no receive

[way235]

This is a K3 kit and is 6 months old bought April this year.  I am going back
thru initial setup and getting E 00044  ERR VC4 in calibration both A and B
VCO. at this time.  Worked perfect until yesterday.



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[Elecraft] K3: Option: power out per ANT1/ANT2 ?

[alexandr.kobranov]

Hi OMs,
let me ask if anybody will consider folowing as useful Option (option - used
when needed :-)):

- in K3 with KAT3 ATU unit (it means with 2 ant outputs ANT1/ANT2) to have 
possibility of different output power set by ANT port.
Simply in menu CONFIG: PWR SET new option PER-ANT

Why? If I have two antennas and one PA used for one of them (main ant) I 
need let say 35W for driving PA on ANT1 port and full power (100W) on ANT2 
directly connected to second antenna (NVIS dipole for example) - without PA.

Then it is possible simply switch ANT 1/2 without need to take care about 
power on output (not to overdive PA for ant1 / use maximal power from 
barefoot K3 for ant2)

Yes, setting can be more complex as NORM/PER-BAND and NORM/PER-ANT together 
can be in the game but in some scenario it can helps (one band contest with 
two antennas and one PA, etc.)

Is it silly idea or any supporters here?
Opinions?

Of course - no idea if this can be done in FW :-(

73!
Lexa, OK1DST
K3/100 #727
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Re: [Elecraft] K3: Option: power out per ANT1/ANT2 ?

[alexandr.kobranov]

Hi Dick,
good idea! I have to check N1MM and K3 Macros docs.
(or any ready-made such a macro to copy/paste?)

But still  fw option is fw option

-dst-




-- Původní zpráva --
Od: Dick Dievendorff d...@elecraft.com
Komu: alexandr.kobra...@seznam.cz alexandr.kobra...@seznam.cz
Datum: 9. 1. 2015 22:03:59
Předmět: Re: [Elecraft] K3: Option: power out per ANT1/ANT2 ?

You might set up a command macro that switches antennas and changes power 
levels, using the AN and PC commands.

73 de Dick, K6KR

 On Jan 9, 2015, at 12:51, alexandr.kobra...@seznam.cz wrote:
 
 snip
 
 - in K3
 different output power set by ANT port.
 menu CONFIG: PWR SET new option PER-ANT

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Re: [Elecraft] K3: Option: power out per ANT1/ANT2 ?

[Dick Dievendorff]

You might set up a command macro that switches antennas and changes power 
levels, using the AN and PC commands.

73 de Dick, K6KR

 On Jan 9, 2015, at 12:51, alexandr.kobra...@seznam.cz wrote:
 
 snip
 
 - in K3
 different output power set by ANT port.
 menu CONFIG: PWR SET new option PER-ANT
 
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[Elecraft] K3 No power out after idle time

[Jack Berry via Elecraft]

This symptom makes me think of edge connector problems I have heard about. But 
in my case there are no low voltage errors that seems to be the case in other 
reports.

If I cycle the radio off and back on everything is good. I think this is the 
third time this has happened, all in the last month. 


The only commonality is that the radio has been on and idle for an hour or two. 
When I return to operate, the problem occurs. I don't think it happens in every 
case.

Any other K3 owners seen this?

Thanks!

 
God Bless  73!
Jack - WE5ST
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Re: [Elecraft] K3 No power out after idle time

[Andy Wood]

Hi Jack,

I have had this exact problem. Turned out to be the connector between the
front panel and main pcb. Treatment with Deoxit has cured it.

BTW - I also had some other weird, seemingly unrelated, problems that would
occur randomly. The Deoxit treatment cured all of those as well.

Andy  VK4KY

***



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[Elecraft] K3 - No Power Out

[Richard Thorne]

I was working stations on and off today.

Came back into the shack this evening and tried to work a VK on 15m and 
I had no output power.


I turned the power dial and it was at 0 watts, no problem just turn it 
up.  Normally I would progress a 1/10 of a watt at a time up to 12 watts 
then it would increase at 1 watt intervals.  This time it started at 0 
and incremented at 1 watt intervals immediately, strange.


After setting the output to 100 watts and then depressing the transmit 
button for a second it would transmit at 0 watts as displayed in the vfo 
b and vfo A would display --.


I've disconnected the external devices to the acc connection (microham 
mkII in this case along with a KAT500)  as well as the rs-232 connection 
to be sure an outside source was not controlling the rig.


I have the KPA3 installed and the rig has been back to Elecraft to have 
the gold pins installed.


Any ideas?

Thanks

Rich - N5ZC




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Re: [Elecraft] K3 no power out

[Ian White]

G3PJT wrote:

Just an update on the no power  problem I reported last month.
After checking a series of RF voltages using a checklist from Gary I 
located the problem as no RF from the KREF3 board at J65 I then removed

the KREF board and all the cables, inspected board and re assembled the

KREF3 and reinstated the cables.
Since then the problem has not recurred.
So it could have been a poor contact on the KREF3 cabling. It was not 
downstream of the KREF3


There have been problems caused by intermittent contacts on some early
series of the TCXO modules, which are a less than firm fit in the
turned-pin socket. Also the nylon cable tie supplied during this period
was too stiff and did not pull both ends of the module down firmly onto
the socket.

I had this problem twice. First time around, I bent the pins on the
module slightly out of line and pushed it back into the socket, and that
seemed to cure the problem. I also replaced the single cable tie by two
very slim ties, inserted under the socket from opposite directions so
that both ends of the module could be pulled down firmly.

That worked for several months but then the problem came back, so the
second time around I thickened the pins of the TCXO module with a little
solder to make them a much firmer fit, and of course replaced the two
cable ties. Two years later (maybe three) it now seems fine.


73 from Ian GM3SEK



73 from Ian GM3SEK


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[Elecraft] K3 no power out

[Bob G3PJT]

Hi
Just an update on the no power  problem I reported last month.
After checking a series of RF voltages using a checklist from Gary I 
located the problem as no RF from the KREF3 board at J65
I then removed the KREF board and all the cables, inspected board and re 
assembled the KREF3 and reinstated the cables.

Since then the problem has not recurred.
So it could have been a poor contact on the KREF3 cabling. It was not 
downstream of the KREF3


73 and thanks to Gary

Bob G3PJT

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[Elecraft] K3 no power out

[Bob G3PJT]

Hi

Suddenly K3/100 serial 3650 refuses to give power out.

Setup is
- VOX is on (SSB and CW)
- not in TEST
- CONFIG TX INH is OFF
- CONFIG KXV3 is nor
- No output when TUNE

Firmware reloaded and is 4.60, 1.15, 2.80, 2.80

I have reloaded my back up configuration file and it still doesn't work.
I had a similar problem a month ago on CW but that seemed to clear itself

Ideas?

73 Bob G3PJT

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Re: [Elecraft] K3 no power out

[David F. Reed]

Bob,

when you are in TUNE, what is PWR set to?  You can check by turning 
that knob; just make sure the LED under PWR is lit, not the one under CMP...
The setting is independently adjustable from the power setting while in 
transmit.


Also, just out of curiosity, are you feeding a dummy load or an antenna, 
and what does the SWR look like?


73 de Dave, W5SV


On 4/24/13 7:56 AM, Bob G3PJT wrote:

Hi

Suddenly K3/100 serial 3650 refuses to give power out.

Setup is
- VOX is on (SSB and CW)
- not in TEST
- CONFIG TX INH is OFF
- CONFIG KXV3 is nor
- No output when TUNE

Firmware reloaded and is 4.60, 1.15, 2.80, 2.80

I have reloaded my back up configuration file and it still doesn't work.
I had a similar problem a month ago on CW but that seemed to clear itself

Ideas?

73 Bob G3PJT

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Re: [Elecraft] K3 no power out

[K2GN]

I had the same problem here.
A diode on the RF board got taken out. Probably from coupling when I
transmitted on my other K3.
Elecraft would have sent me the diode to replace but I don't get along well
doing the work,(Bad hand from stroke)
The radio is back. I'm working on getting rid of and RF or coupling in the
shack.
It could have happen from 80/160 RF because that antenna took a beating
during the hurricane, also the joins were very corroded salt the salt air
environment.
de K2GN/Larry


 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David F. Reed
Sent: Wednesday, April 24, 2013 09:08
To: Bob G3PJT
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 no power out

Bob,

when you are in TUNE, what is PWR set to?  You can check by turning that
knob; just make sure the LED under PWR is lit, not the one under CMP...
The setting is independently adjustable from the power setting while in
transmit.

Also, just out of curiosity, are you feeding a dummy load or an antenna, and
what does the SWR look like?

73 de Dave, W5SV


On 4/24/13 7:56 AM, Bob G3PJT wrote:
 Hi

 Suddenly K3/100 serial 3650 refuses to give power out.

 Setup is
 - VOX is on (SSB and CW)
 - not in TEST
 - CONFIG TX INH is OFF
 - CONFIG KXV3 is nor
 - No output when TUNE

 Firmware reloaded and is 4.60, 1.15, 2.80, 2.80

 I have reloaded my back up configuration file and it still doesn't work.
 I had a similar problem a month ago on CW but that seemed to clear 
 itself

 Ideas?

 73 Bob G3PJT

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Re: [Elecraft] K3 no power out

[Bob Whelan]

5w and a dummy load

73 Bob



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[Elecraft] K3 no power out on DATA

[george]

Thanks for all of the help regarding my audio issue. Turned bias on as
suggested and can hear myself.  Selected High, tried to put the
additional audio stage in with 3 on the mike menu; but, get a response
N/A.  Have yet to find the right combination to get sufficient audio
out of the mike.

I still feel that my problem is configuration.

Any thoughts?

George
K2CM
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[Elecraft] K3 no power out on DATA

[Mike Sanders]

Well, Only days old here the new K3 is still challenging
me. Lots of fun without doubt. Anyway I am running MMTTY
and using AFSK in the data mode. Everything looks good
but no output. I tried shifting to USB/LSB and output is as
set on power control. Tones on monitor and another RX
sound good as well. But again when in data mode I get
no/very low output. Power is set at about 50W and I get
that in USB. Any thoughts on what I am missing here?
Thanks es 73, Mike


Mike Sanders
KØAZ




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Re: [Elecraft] K3 no power out on DATA

[Joe Subich, W4TV]

The K3 stores input selection (mic - front | rear, or
line) and mic level/line level on a per mode and per
band basis.  Have you set up the input and mic/line
levels correctly in DATA A/AFSK A on each band?

73,

... Joe, W4TV


On 9/4/2012 4:31 PM, Mike Sanders wrote:
 Well, Only days old here the new K3 is still challenging
 me. Lots of fun without doubt. Anyway I am running MMTTY
 and using AFSK in the data mode. Everything looks good
 but no output. I tried shifting to USB/LSB and output is as
 set on power control. Tones on monitor and another RX
 sound good as well. But again when in data mode I get
 no/very low output. Power is set at about 50W and I get
 that in USB. Any thoughts on what I am missing here?
 Thanks es 73, Mike


  Mike Sanders
  KØAZ




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Re: [Elecraft] K3 no power out on DATA

[Don Wilhelm]

Mike,

That sounds to me as though you have the input set for MIC rather than 
line in, or something similar.

First I would suggest using Line In and use DATA mode (AFSK A submode), 
select Line In in the MIC SEL menu.
Set the K3 into TX TEST (or set the power down and operate into a dummy 
load) - set MMTTY into transmit, then --
Adjust the line out and Wave sliders on your soundcard to about 2/3 of 
full scale.
Then adjust the MIC Gain (now actually Line In) to illuminate 4 bars on 
the ALC meter with the 5th bar flashing - ignore the conventional 
wisdom given for data mode setup (no alc indication) - the K3 is 
different, the - the 1st 4 bars of the ALC meter do not indicate ALC at 
all, they are there to help you adjust the audio level.  The 5th bar 
indicates the onset of ALC

73,
Don W3FPR

On 9/4/2012 4:31 PM, Mike Sanders wrote:
 Well, Only days old here the new K3 is still challenging
 me. Lots of fun without doubt. Anyway I am running MMTTY
 and using AFSK in the data mode. Everything looks good
 but no output. I tried shifting to USB/LSB and output is as
 set on power control. Tones on monitor and another RX
 sound good as well. But again when in data mode I get
 no/very low output. Power is set at about 50W and I get
 that in USB. Any thoughts on what I am missing here?
 Thanks es 73, Mike


  Mike Sanders
  KØAZ




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Re: [Elecraft] K3 no power out on DATA

[Mike Sanders]

That was it Don. I set line in for this mode and it came right up.
I will get the levels set in a bit as you say for the K3. I guess you
did it again Don. Thanks much es 73, Mike

Mike Sanders
KØAZ






-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com]
Sent: Tuesday, September 04, 2012 16:54 PM
To: Mike Sanders
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 no power out on DATA


Mike,

That sounds to me as though you have the input set for MIC rather than
line in, or something similar.

First I would suggest using Line In and use DATA mode (AFSK A submode),
select Line In in the MIC SEL menu.
Set the K3 into TX TEST (or set the power down and operate into a dummy
load) - set MMTTY into transmit, then --
Adjust the line out and Wave sliders on your soundcard to about 2/3 of
full scale.
Then adjust the MIC Gain (now actually Line In) to illuminate 4 bars on
the ALC meter with the 5th bar flashing - ignore the conventional
wisdom given for data mode setup (no alc indication) - the K3 is
different, the - the 1st 4 bars of the ALC meter do not indicate ALC at
all, they are there to help you adjust the audio level.  The 5th bar
indicates the onset of ALC

73,
Don W3FPR
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Re: [Elecraft] K3 no power out on DATA

[vk4tux]

Mike , What I am wondering now is how line in adj helped you, as when when I
suggested that you look at line in level earlier, you said you are using FP
front mike for input?

Adrian ... vk4tux







Adrian, Thanks for the input. I got the Beta firmware, downloaded

set up and running so am good for the moment. Just cannot get

the output up on RTTY Data. I am using a front mount mic selection

but my mike goes to a rigblaster duo it does all this house keeping.

The radio keys up and goes into transmit. My set up for the Kwood

mike works in the rigblaster on all the other modes Digital etc. So

I have audio into the mic input from my computer through the

rigblaster on the other modes to the K3. Leave it to me to disable

something obsure. Thanks again es 73 for now.

 

 

 

Mike Sanders 

 KØAZ

   

 

-Original Message-
From: Adrian Fewster [mailto:a.fews...@pf.uq.edu.au]
Sent: Tuesday, September 04, 2012 16:53 PM
To: k...@centurytel.net
Subject: RE: [Elecraft] K3 no power out on DATA

“comp is at zero. Line level was set up and adjusted
up some. I do not remember the level right now but I
did get to it. However I am set up for FP mic and have
it up all the way. Output on USB is good and very low
output on Data. Data sounds good in another receiver
and on monitor but no output to speak of. Thanks



Mike Sanders
KØAZ”

 

 

Mike , You are using a mic or front mic socket to bring in the audio from
the pc? Not using the line in on back of k3?





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[Elecraft] k3 and power out on wattmeter

[W2XB]

Here I am using the K3 with the KPA500 and P3. Everything works great. But I
have notice that when I am using the 2.7 filter and cw, and the  power set
on the K3 is 80 watts, the watt meter on the Kpa shows 60 watts. If use the
500hz filter (on the K3) the kpa watt meter shows 80 watts. Also notice that
if I have the cw pitch set above 400hz the correct watts show on the watt
meter. But if I set the pitch to about 350 where Ilike it, it shows a drop
in power output on the meter. (60 w) 
 Did the ref cal with wwv and calibrated the watt meter through the menu.
Can anyone tell me why this is happaning?

Don...w2xb

P.S. does the same using external wattmeter (W2)

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[Elecraft] k3 50mhz power out

[Johnny Siu]

I get something slightly over 100 watt under my LP100A.  However, a pre-amp is 
necessary for more sensitivity.

TNX  73,


Johnny VR2XMC

從︰ Mike Rodgers mikerodgerske5...@yahoo.com
收件人︰ Elecraft@mailman.qth.net Elecraft@mailman.qth.net
傳送日期︰ 2011年04月23日 (週六) 8:37 AM
主題︰ Re︰ [Elecraft] Re k3 50mhz power out

Are you guys actually getting 106 watts out and is that blessed by elecraft?
I was thinking it was supposed to be around 80 watts?  Do tell. 

73 
Mike R
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[Elecraft] K3 - No power out on 6M

[Ed K1EP]

I haven't used my K3 in a couple of weeks, but the thought of working 
some Au tonight got me going.  I turned on the radio, connected the 
antenna and I could only get 5 or 6 watts out with the PA and 0.1 
watts under the 12W setting.  The power didn't vary at all with the 
power control, except when the PA clicked in or out.  Very little 
current being drawn.  Power out is normal on all other bands.  I did 
a quick check of the archives and didn't see anything, but I might 
have missed something.  Does any of this ring a bell with anyone?

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RE: [Elecraft] K3 max power out 63W?

[Rob May]

I was using the internal wattmeter in the K3.  I don't have an external 
wattmeter.  I hooked the radio up to an oscilloscope today and the power maxes 
out between the 60 and 70 watt setting.  The scope is an old Tektronix 422 and 
the absolute measurements probably aren't that accurate, but the relative 
measurements should be valid.  Here's what I get:
Setting  Output
10 9
20 16
30 23
40 31
50 46
60 67
70 77
80 77
90 77
10077
11077
12077

The measurements are subject to interpolation of a fuzzy line on a small, old 
crt on an old 15MHz scope, so I'm not as concerned about the actual numbers as 
I am the fact that they level off after about 65 watts indicated on the power 
setting.  The measurements were take on the 160m band into a dummy load with 
the ATU bypassed and an indicated SWR of 1.1-1.  I'm thinking that one of the 
finals in the KPA3 has failed.
Rob
NV5E
K3 #1417


From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: RE: [Elecraft] K3 max power out 63W?
Date: Sun, 2 Nov 2008 07:25:23 -0600



How are you measuring your power output? Are you using an external 
wattmeter? If not, you don't know if you have a power problem or a metering 
problem.
 
Use an external wattmeter and report your findings. Also, is your 
tuner in bypass? 
 
Mike
AI4NS



From: [EMAIL PROTECTED] 
[mailto:[EMAIL PROTECTED] On Behalf Of Rob 
May
Sent: Saturday, November 01, 2008 7:29 PM
To: 
elecraft@mailman.qth.net
Subject: [Elecraft] K3 max power out 
63W?


I dont' know when it happened, but I can no longer get full power out 
of my K3 (s/n 1417 FW 2.58 DSP 1.94).  Using the tune control, power out 
will not go above 63 watts.  I can do the TXGN calibration at 5W and 50W 
with no problem.  But if I turn up the power, the output never goes above 
63W, i.e. if I dial in 50, I get 50W, if I dial in 63, I get 63W, if I dial in 
75, I get 63W, if I dial in 100 or 120, I get 63W.  It used to work 
ok.  This is all into a dummy load with an indicated SWR of 1.1-1.  
What could have happened?  I've tried going back to FW 2.45, but the 
problem still exists.  Any help would be 
appreciated.
Rob
NV5E



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[Elecraft] K3 max power out 63W?

[Rob May]

I dont' know when it happened, but I can no longer get full power out of my K3 
(s/n 1417 FW 2.58 DSP 1.94).  Using the tune control, power out will not go 
above 63 watts.  I can do the TXGN calibration at 5W and 50W with no problem.  
But if I turn up the power, the output never goes above 63W, i.e. if I dial in 
50, I get 50W, if I dial in 63, I get 63W, if I dial in 75, I get 63W, if I 
dial in 100 or 120, I get 63W.  It used to work ok.  This is all into a dummy 
load with an indicated SWR of 1.1-1.  What could have happened?  I've tried 
going back to FW 2.45, but the problem still exists.  Any help would be 
appreciated.
Rob
NV5E

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