Date   

Re: [Elecraft_K3] K3 Beta Firmware Rev. 3.59: Misc. improvements

Steve Ellington
 

During firmware uploads, I don't even touch the mouse! May be safer to just leave the room.

Steve
N4LQ
N4LQ@...

----- Original Message -----
From: "dalej" <dalej2@...>
To: <Elecraft_K3@...>
Cc: "Elecraft Reflector" <elecraft@...>
Sent: Thursday, November 19, 2009 7:13 PM
Subject: Re: [Elecraft_K3] K3 Beta Firmware Rev. 3.59: Misc. improvements


I had the same loud pop and crackle with s-meter pegging out when I
turned on power to the K3 today. It was previously set on Radio NZ
freq and AM sync was enabled when I turned it off this morning before
leaving on a road trip. I re-loaded 3.59 late this afternoon and now
all seems to be ok. I tried turning off the K3, leaving it on AM with
sync enabled and it did not pop and crack plus the S-meter did not peg
out. I must have had a faulty upload the first time. I have to admit
while uploading the firmware I was doing other things on the computer
so maybe it was due to my fiddling. I'll check it out again early in
the morning, but everything seems to be ok now. In fact it appears
the sync is locking faster and more steady now. Keeping fingers
crossed.

Dale, K9VUJ



On 19, Nov 2009, at 3:46, dalej wrote:

Loaded 3.59 just now. Radio NZ on 9765, locks on with the K3 at
9764.984, it's dithering a couple of hz. 5-4-5-4-3 etc.

After this load I thought I had a problem. It ended the download and
returned the K3 to (what I thought) would be normal operation with a
loud pop and crackle in the speaker. The S-meter was pegged out. I
shut down the K3 for a few seconds and turned it back on with the same
results. So I turned off the K3 and the power supply for a little
longer then turned it back on, meter still pegged out, after several
seconds or perhaps a minute the meter slowly came back down and I was
receiving Radio NZ. Now everything seems to be ok. I have not tried
transmitting yet.

Dale, K9VUJ



On 18, Nov 2009, at 20:41, Wayne Burdick wrote:

K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and
cancel. These are still in the works and will be made available in
time for the phone contest this weekend.

Please send any questions to k3support@.... For instructions
on how to load beta firmware, see:

http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
contributed by the synchronous AM detector's PLL should be only
a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU TUNE.
This tone provides a rough idea of the SWR that the KAT3 was
able to obtain:

Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
Same pitch as 1st tone: SWR <= 2.0:1
Medium-high pitch: SWR <= 3.0:1
High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but it�s
useful whenever you tap ATU TUNE without looking at the final SWR
reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).




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Re: [Elecraft_K3] K3 Beta Firmware Rev. 3.59: Misc. improvements

Dale, K9VUJ
 

I had the same loud pop and crackle with s-meter pegging out when I
turned on power to the K3 today. It was previously set on Radio NZ
freq and AM sync was enabled when I turned it off this morning before
leaving on a road trip. I re-loaded 3.59 late this afternoon and now
all seems to be ok. I tried turning off the K3, leaving it on AM with
sync enabled and it did not pop and crack plus the S-meter did not peg
out. I must have had a faulty upload the first time. I have to admit
while uploading the firmware I was doing other things on the computer
so maybe it was due to my fiddling. I'll check it out again early in
the morning, but everything seems to be ok now. In fact it appears
the sync is locking faster and more steady now. Keeping fingers
crossed.

Dale, K9VUJ

On 19, Nov 2009, at 3:46, dalej wrote:

Loaded 3.59 just now. Radio NZ on 9765, locks on with the K3 at
9764.984, it's dithering a couple of hz. 5-4-5-4-3 etc.

After this load I thought I had a problem. It ended the download and
returned the K3 to (what I thought) would be normal operation with a
loud pop and crackle in the speaker. The S-meter was pegged out. I
shut down the K3 for a few seconds and turned it back on with the same
results. So I turned off the K3 and the power supply for a little
longer then turned it back on, meter still pegged out, after several
seconds or perhaps a minute the meter slowly came back down and I was
receiving Radio NZ. Now everything seems to be ok. I have not tried
transmitting yet.

Dale, K9VUJ



On 18, Nov 2009, at 20:41, Wayne Burdick wrote:

K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and
cancel. These are still in the works and will be made available in
time for the phone contest this weekend.

Please send any questions to k3support@.... For instructions
on how to load beta firmware, see:

http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
contributed by the synchronous AM detector's PLL should be only
a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU TUNE.
This tone provides a rough idea of the SWR that the KAT3 was
able to obtain:

Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
Same pitch as 1st tone: SWR <= 2.0:1
Medium-high pitch: SWR <= 3.0:1
High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but it’s
useful whenever you tap ATU TUNE without looking at the final SWR
reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).




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Re: [Elecraft] K3 Beta Firmware Rev. 3.59: Misc. improvements

Dick Dievendorff <dieven@...>
 

The K3 Utility reads each .hex file into RAM (and validates it there) before
starting to send it to the K3. If the file is unreadable because of a
network glitch, we want to discover that before beginning a firmware load.
This was fixed almost a year ago.

Dick, K6KR

-----Original Message-----
From: elecraft-bounces@...
[mailto:elecraft-bounces@...] On Behalf Of Guy Olinger K2AV
Sent: Thursday, November 19, 2009 8:41 AM
To: Wayne Burdick
Cc: Elecraft Reflector; elecraft_k3@...;
elecraft@...
Subject: Re: [Elecraft] K3 Beta Firmware Rev. 3.59: Misc. improvements

In 3.59 -- Sync AM listening to music on HF BC, the sync search usually
kicks in and resettles at the bottom of a carrier fadeout, which will almost
always involve a near 180 degree phase shift at the bottom. The transition
is MUCH better than 3.58 for listening to music, the one or two cycle "woop"
neatly blending into the other spectral changes at the bottom of the fade,
MINUS the no-carrier distortion.

I found myself enjoying a story reading on 7440 (?, didn't write it down)
where using the shift to listen on the upper side got rid of some grindy
stuff on low side, and the considerable fades were handled.

<-Nice-> :>)

On the firmware loads...

Standard advice if any firmware load issues, on PC shut down all programs
except the utility, do nothing else when loading firmware. Do NOT try to
load firmware with the download as a virtual directory. If the utility
starts up funny, takes too long, or comes up on 9k serial speed, kill it and
restart it.

When the utility comes up quick and clean, start the firmware, get up and
take a break. Leave PC alone, don't touch, no browsing, no mouse moves.

When it's done, kill the utility, power off the K3 for at least 15 seconds.
THEN power on and see how it's working.

Various occasional wierdness has ceased since rigidly sticking to this
policy. Windows has always been hostile to timing sensitive hardware
drivers and utilities.

73, Guy.

On Wed, Nov 18, 2009 at 9:41 PM, Wayne Burdick <n6kr@...> wrote:

K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and
cancel. These are still in the works and will be made available in
time for the phone contest this weekend.

Please send any questions to k3support@.... For instructions
on how to load beta firmware, see:

http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
contributed by the synchronous AM detector's PLL should be only
a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU TUNE.
This tone provides a rough idea of the SWR that the KAT3 was
able to obtain:

Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
Same pitch as 1st tone: SWR <= 2.0:1
Medium-high pitch: SWR <= 3.0:1
High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but it's
useful whenever you tap ATU TUNE without looking at the final SWR
reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).


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Re: [Elecraft_K3] Wanted -Powerpole connector in UK

David Pratt <david@...>
 

In a recent message, alelcoate <alelcoate@...> wrote ...

Can any UK users enlighten me on where I could obtain a Powerpole connector (preferrably with 3m of cable fitted) for my K3.

Yes, Alan, have a look at www.cpc.co.uk and search for CN10077 for starters. Click on "More Images" to see the whole range. CPC of Preston is a branch of Farnell and they sell the parts separately in minimum quantities of five.

If you don't have their free 2836-page catalogue, request one. It will arrive the next day by UPS brown van. There's lots of goodies in there. The Powerpole and "Monocon" connectors are on page 1275.

73

David G4DMP
--
+- - - - - - - - - - - - - - - - - - - - -+
| David M Pratt G4DMP, Kippax, Leeds, UK |
| K1 #1117; KX1 #0052; K2 #1583; K3 #0186 |
+- - - - - - - - - - - - - - - - - - - - -+


Re: [Elecraft_K3] Wanted -Powerpole connector in UK

Peter Howson
 

Alan
 
Try Farnell - packs of 20 individual connectors (2 required per end)
 
 
They are also available from Torbury - packs 0f 10

http://torberry.co.uk/shop/index.php?main_page=index&cPath=1&zenid=4099722d0d273c99f2a06771575b6d3e

There has been lots written about power poles on the reflector - crimping versus soldering etc. Worth looking at the reflector archives.

73

Peter

GM8GAX

 
 
 

-----Original Message-----
From: Elecraft_K3@... [mailto:Elecraft_K3@...] On Behalf Of alelcoate
Sent: 19 November 2009 13:58
To: Elecraft_K3@...
Subject: [Elecraft_K3] Wanted -Powerpole connector in UK

 

Can any UK users enlighten me on where I could obtain a Powerpole connector (preferrably with 3m of cable fitted) for my K3.

I need to reorganise my shack and the lead I got with my radio will be too short. I can't seem to find a source as my google search gives me LARGE connectors.

Thanks in advance

Alan
G0RTH


Wanted -Powerpole connector in UK

alelcoate <alelcoate@...>
 

Can any UK users enlighten me on where I could obtain a Powerpole connector (preferrably with 3m of cable fitted) for my K3.

I need to reorganise my shack and the lead I got with my radio will be too short. I can't seem to find a source as my google search gives me LARGE connectors.

Thanks in advance

Alan
G0RTH


Re: [Elecraft_K3] K3 Beta Firmware Rev. 3.59: Misc. improvements

Dale, K9VUJ
 

Loaded 3.59 just now. Radio NZ on 9765, locks on with the K3 at
9764.984, it's dithering a couple of hz. 5-4-5-4-3 etc.

After this load I thought I had a problem. It ended the download and
returned the K3 to (what I thought) would be normal operation with a
loud pop and crackle in the speaker. The S-meter was pegged out. I
shut down the K3 for a few seconds and turned it back on with the same
results. So I turned off the K3 and the power supply for a little
longer then turned it back on, meter still pegged out, after several
seconds or perhaps a minute the meter slowly came back down and I was
receiving Radio NZ. Now everything seems to be ok. I have not tried
transmitting yet.

Dale, K9VUJ

On 18, Nov 2009, at 20:41, Wayne Burdick wrote:

K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and
cancel. These are still in the works and will be made available in
time for the phone contest this weekend.

Please send any questions to k3support@.... For instructions
on how to load beta firmware, see:

http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
contributed by the synchronous AM detector's PLL should be only
a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU TUNE.
This tone provides a rough idea of the SWR that the KAT3 was
able to obtain:

Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
Same pitch as 1st tone: SWR <= 2.0:1
Medium-high pitch: SWR <= 3.0:1
High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but it’s
useful whenever you tap ATU TUNE without looking at the final SWR
reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).




------------------------------------

Yahoo! Groups Links



Re: [Elecraft_K3] K3 Beta Firmware Rev. 3.59: Misc. improvements

Joe Subich, W4TV
 

Sync AM is much better behaved and "smoother" sounding. Tracking
accuracy seems to be less than +/- 3 Hz and lock is maintained
with significantly more fading than the initial release. However,
it would be nice if the audio DSP controls (low cut and/or shift)
were not disabled in Sync-AM. There are many times when getting
rid of the bottom 100 or 150 Hz of audio response (RX EQ does not
make a difference) will make a big difference in cleaning up the
recovered audio.

73,

... Joe, W4TV

-----Original Message-----
From: Elecraft_K3@...
[mailto:Elecraft_K3@...] On Behalf Of Wayne Burdick
Sent: Wednesday, November 18, 2009 9:42 PM
To: Elecraft Reflector; elecraft_k3@...;
elecraft@...
Subject: [Elecraft_K3] K3 Beta Firmware Rev. 3.59: Misc. improvements


K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and
cancel. These are still in the works and will be made available in
time for the phone contest this weekend.

Please send any questions to k3support@.... For
instructions on how to load beta firmware, see:

http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The
offset contributed by the synchronous AM detector's PLL
should be only a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU
TUNE. This tone provides a rough idea of the SWR that the
KAT3 was able to obtain:

Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
Same pitch as 1st tone: SWR <= 2.0:1
Medium-high pitch: SWR <= 3.0:1
High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but
it’s useful whenever you tap ATU TUNE without looking at the
final SWR reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).




------------------------------------

Yahoo! Groups Links



K3 Beta Firmware Rev. 3.59: Misc. improvements

 

K3 beta-test firmware revision 3.59 (with DSP rev. 2.46) is now
available. See release notes below.

Rev. 3.59 does _not_ include any changes to DVR message playback and
cancel. These are still in the works and will be made available in
time for the phone contest this weekend.

Please send any questions to k3support@.... For instructions
on how to load beta firmware, see:

http://www.elecraft.com/K3/k3_software.htm

73,
Wayne
N6KR

* * *

MCU 3.59 / DSP 2.46, 11-18-2009

* FSK-D WAS CHANGING TO AFSK-A ON A/B or REV: Fixed.

* SYNC AM VFO TRACKING ACCURACY IMPROVED (DSP 2.46). The offset
contributed by the synchronous AM detector's PLL should be only
a few Hz, max.

* SWR INDICATOR TONES AFTER ATU TUNE: If switch tones
are enabled, a second tone will be emitted following an ATU TUNE.
This tone provides a rough idea of the SWR that the KAT3 was
able to obtain:

Lower pitch than 1st tone: Unknown SWR (ant. may be shorted)
Same pitch as 1st tone: SWR <= 2.0:1
Medium-high pitch: SWR <= 3.0:1
High pitch: SWR > 3.0:1.

This feature was added primarily for our blind customers, but it’s
useful whenever you tap ATU TUNE without looking at the final SWR
reading.

Remote Control Command Changes:

* IC COMMAND (ICON status): Now returning correct message
bank in voice modes (byte a, bit 3).


Re: [Elecraft_K3] Elecraft Tweets on Twitter

Dale, K9VUJ
 

This twtter-head is monitoring and RSS fed. I'm wired!!! :)

73
Dale, K9VUJ

On 18, Nov 2009, at 16:38, wa6hhq wrote:



For all you Twitter-heads out there, we are making regular short announcements on Twitter. Typically Tech alerts and new f/w and product announcements.

See: http://twitter.com/elecraft

73, Eric WA6HHQ
Elecraft




Elecraft Tweets on Twitter

Eric Swartz - WA6HHQ, Elecraft
 

For all you Twitter-heads out there, we are making regular short announcements on Twitter. Typically Tech alerts and new f/w and product announcements.

See:  http://twitter.com/elecraft

73, Eric   WA6HHQ
Elecraft


Re: [Elecraft_K3] KBPF3 questions

ajsoenke@...
 

In a sense the KBPF3 filter does enhance hamband listening. It improves performance between the ham bands where the SWL activity and other communications channels exist.
As to the roofing filters, you will notice a difference between AM (6Khz filter) and FM (13KHz filter) when monitoring SWBC. It is also nice to be able to use the narrower SSB filters on AM SW stations by filtering one sideband (Tuning off carrier) to improve interference rejection. There are many options to experiment with, and the results can be quite surprising.

Al WA6VNN


-----Original Message-----
From: Mike Kasrich
To: Elecraft_K3@...
Sent: Tue, Nov 17, 2009 11:58 am
Subject: Re: [Elecraft_K3] KBPF3 questions

I know you all have this feature for BC listening. I have one installed 
no 6 or 13Khz filter needed if not wanted. There is no difference in ham
band performance that I can tell. Question three will have to be
answered by others

avavra1@... wrote:
>
> Group:
>
> I have a couple of questions about the KBPF3 General Coverage RX
> Bandpass Module.
>
> 1) If installed in the main receiver does the General Coverage module
> cause any degradation to ham band receive performance?
>
> 2) Is an additional wide bandwidth roofing (6 kHz, 13 kHz) filter
> required to be added to the main RX when the KBPF is installed?
>
> 3) I have seen messages posted recommending the 13 kHz roofing filter
> and am curious if AM and FM transmit can be enabled through the 13 kHz
> filter installed so I can use the K3 for AM and FM transmissions on
> 160, 80, 10 and 6 meters?
>
> Anyone already doing this, and what do you recommend?
>
> de andy, KD3RF / VE2DXY
>
>



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Re: K3/100 and KPA3 Rev C Tech Alert - Important

Eric Swartz - WA6HHQ, Elecraft
 

Yup. As noted at the beginning of my post and in the alert .pdf, you are way outside the s/n and date range.

We also check for this on all repair / upgrade K3s coming through our tech group.

73, Eric  WA6HHQ



--- In Elecraft_K3@..., John Merrill wrote:
>
> Mine is there for repair at this moment, serial #2555 purchased in Jan 2009.
> I assume mine should be ok.
>
> 73,
> John N1JM
>
> On Tue, Nov 17, 2009 at 5:05 PM, wa6hhq wa6hhq_lists@... wrote:
>
> >
> >
> > *Spurious TX sidebands due to C3 installation on early Rev C KPA3 PC
> > boards.*
> >
> > * *
> >
> > *We have determined that a small number of K3/100s and KPA3s left the
> > factory earlier this year with capacitor C3 installed by mistake on early
> > Revision C KPA3 PC boards. * This part location should be empty on Rev. C
> > KPA3s. Installation of C3 causes the PA bias supply to oscillate on some
> > KPA3s at approximately 15-20 kHz, resulting in spurious TX sidebands at that
> > spacing from the carrier.
> >
> >
> >
> > *S/N & Date** Range**: A small number of K3/100s within* *approximately
> > S/N 3000-3138*. These radios were shipped approximately *April 30 to June
> > 2, 2009*. Upgrade or repair KPA3s sent separately during this time period
> > may also be affected.
> >
> >
> >
> > *After June 2, 2009, this problem was corrected for all K3/100s s/n 3139
> > and later, and all Rev C KPA3s bought as an upgrade. *This alert *does not
> > * apply to Rev C KPA3s shipped after June 2, 2009.
> >
> >
> >
> > *Symptom:* A strong TX spur, approximately -20 dB down from peak transmit
> > power, spaced approximately 15-20 kHz on each side of the operating
> > frequency.
> >
> >
> >
> > *Corrective Action:* Remove capacitor C3 from the Rev C KPA3 PCB as
> > described in our detailed Tech note.
> >
> >
> > A detailed Tech. Alert App note (.pdf) can be downloaded from:
> > http://www.elecraft.com/K3/mods/K3%20Technical%20Alert%201.pdf
> >
> > It contains detailed info and pictures.
> >
> > Its also linked to from our K3 Mods and App notes Page:
> > http://www.elecraft.com/K3/k3_app_notes.htm
> >
> > We apologize for this issue. We thought we had contacted all of the K3
> > owners affected, but we have found a few we missed, so we are posting this
> > here.
> >
> > If after reading the Tech. Alert you have questions, please feel free to
> > contact our Tech. group at k3support@... or via phone at
> > 831-763-4211
> >
> > 73, Eric WA6HHQ
> >
> >
>


Re: [Elecraft_K3] K3/100 and KPA3 Rev C Tech Alert - Important

John Merrill <johnn1jm@...>
 

Mine is there for repair at this moment, serial #2555 purchased in Jan 2009. I assume mine should be ok.

73,
John N1JM


On Tue, Nov 17, 2009 at 5:05 PM, wa6hhq <wa6hhq_lists@...> wrote:
 

Spurious TX sidebands due to C3 installation on early Rev C KPA3 PC boards.

 

We have determined that a small number of K3/100s and KPA3s left the factory earlier this year with capacitor C3 installed by mistake on early Revision C KPA3 PC boards.  This part location should be empty on Rev. C KPA3s.  Installation of C3 causes the PA bias supply to oscillate on some KPA3s at approximately 15-20 kHz, resulting in spurious TX sidebands at that spacing from the carrier.

 

S/N & Date Range: A small number of K3/100s within approximately S/N 3000-3138. These radios were shipped approximately April 30 to June 2, 2009.  Upgrade or repair KPA3s sent separately during this time period may also be affected.

 

After June 2, 2009, this problem was corrected for all K3/100s s/n 3139 and later, and all Rev C KPA3s bought as an upgrade. This alert does not apply to Rev C KPA3s shipped after June 2, 2009.

 

Symptom: A strong TX spur, approximately -20 dB down from peak transmit power, spaced approximately 15-20 kHz on each side of the operating frequency.

 

Corrective Action: Remove capacitor C3 from the Rev C KPA3 PCB as described in our detailed Tech note.


A detailed  Tech. Alert App note (.pdf) can be downloaded from:
http://www.elecraft.com/K3/mods/K3%20Technical%20Alert%201.pdf

It contains detailed info and pictures.

Its also linked to from our K3 Mods and App notes Page:
http://www.elecraft.com/K3/k3_app_notes.htm

We apologize for this issue. We thought we had contacted all of the K3 owners affected, but we have found a few we missed, so we are posting this here.

If after reading the Tech. Alert you have questions, please feel free to contact our Tech. group at k3support@... or via phone at 831-763-4211

73, Eric  WA6HHQ



Re: K3/100 and KPA3 Rev C Tech Alert - Important

Eric Swartz - WA6HHQ, Elecraft
 

Hi Mike,

No, if its clean, you are probably OK. Make sure you are checking at
above 13W so the KPA3 is in-line.

Not ALL KPA3s in the s/n or date range have C3 installed. I actually
listed a slightly widers/n range than we thought the problem occurred in
just to make sure we caught them all. s/n 3008 is at the leading edge
and probably missed it.

As per the app note, you can look through the front top cover vents at
the KPA3 PCB to see if you have a Rev C PCB. Odds are you have the
prior rev.

73, Eric



--- In Elecraft_K3@..., "Leigh" <bipi@...> wrote:

Eric,

I have serial # 3008. I've checked my signal on a spectrum analyzer
and it is clean. Do all KPA3's with the C3 installed on the board have
this problem or is it possible to show up at a later date?

Thanks

73 de Mike
K7PI

----- Original Message -----
From: wa6hhq
To: Elecraft_K3@...
Sent: Tuesday, November 17, 2009 4:05 PM
Subject: [Elecraft_K3] K3/100 and KPA3 Rev C Tech Alert - Important





Spurious TX sidebands due to C3 installation on early Rev C KPA3 PC
boards.



We have determined that a small number of K3/100s and KPA3s left the
factory earlier this year with capacitor C3 installed by mistake on
early Revision C KPA3 PC boards. This part location should be empty on
Rev. C KPA3s. Installation of C3 causes the PA bias supply to oscillate
on some KPA3s at approximately 15-20 kHz, resulting in spurious TX
sidebands at that spacing from the carrier.



S/N & Date Range: A small number of K3/100s within approximately S/N
3000-3138. These radios were shipped approximately April 30 to June 2,
2009. Upgrade or repair KPA3s sent separately during this time period
may also be affected.



After June 2, 2009, this problem was corrected for all K3/100s s/n
3139 and later, and all Rev C KPA3s bought as an upgrade. This alert
does not apply to Rev C KPA3s shipped after June 2, 2009.



Symptom: A strong TX spur, approximately -20 dB down from peak
transmit power, spaced approximately 15-20 kHz on each side of the
operating frequency.



Corrective Action: Remove capacitor C3 from the Rev C KPA3 PCB as
described in our detailed Tech note.




A detailed Tech. Alert App note (.pdf) can be downloaded from:
http://www.elecraft.com/K3/mods/K3%20Technical%20Alert%201.pdf

It contains detailed info and pictures.

Its also linked to from our K3 Mods and App notes Page:
http://www.elecraft.com/K3/k3_app_notes.htm

We apologize for this issue. We thought we had contacted all of the
K3 owners affected, but we have found a few we missed, so we are posting
this here.

If after reading the Tech. Alert you have questions, please feel
free to contact our Tech. group at k3support@... or via phone at
831-763-4211

73, Eric WA6HHQ


Re: [Elecraft_K3] K3/100 and KPA3 Rev C Tech Alert - Important

Mike
 

Eric,
 
I have serial # 3008.  I've checked my signal on a spectrum analyzer and it is clean.  Do all KPA3's with the C3 installed on the board have this problem or is it possible to show up at a later date?
 
Thanks
 
73 de Mike
K7PI
 

----- Original Message -----
From: wa6hhq
Sent: Tuesday, November 17, 2009 4:05 PM
Subject: [Elecraft_K3] K3/100 and KPA3 Rev C Tech Alert - Important

 

Spurious TX sidebands due to C3 installation on early Rev C KPA3 PC boards.

We have determined that a small number of K3/100s and KPA3s left the factory earlier this year with capacitor C3 installed by mistake on early Revision C KPA3 PC boards.  This part location should be empty on Rev. C KPA3s.  Installation of C3 causes the PA bias supply to oscillate on some KPA3s at approximately 15-20 kHz, resulting in spurious TX sidebands at that spacing from the carrier.

S/N & Date Range: A small number of K3/100s within approximately S/N 3000-3138. These radios were shipped approximately April 30 to June 2, 2009.  Upgrade or repair KPA3s sent separately during this time period may also be affected.

After June 2, 2009, this problem was corrected for all K3/100s s/n 3139 and later, and all Rev C KPA3s bought as an upgrade. This alert does not apply to Rev C KPA3s shipped after June 2, 2009.

 

Symptom: A strong TX spur, approximately -20 dB down from peak transmit power, spaced approximately 15-20 kHz on each side of the operating frequency.

Corrective Action: Remove capacitor C3 from the Rev C KPA3 PCB as described in our detailed Tech note.


A detailed  Tech. Alert App note (.pdf) can be downloaded from:
http://www.elecraft.com/K3/mods/K3%20Technical%20Alert%201.pdf

It contains detailed info and pictures.

Its also linked to from our K3 Mods and App notes Page:
http://www.elecraft.com/K3/k3_app_notes.htm

We apologize for this issue. We thought we had contacted all of the K3 owners affected, but we have found a few we missed, so we are posting this here.

If after reading the Tech. Alert you have questions, please feel free to contact our Tech. group at k3support@elecraft.com or via phone at 831-763-4211

73, Eric  WA6HHQ


K3/100 and KPA3 Rev C Tech Alert - Important

Eric Swartz - WA6HHQ, Elecraft
 

Spurious TX sidebands due to C3 installation on early Rev C KPA3 PC boards.

 

We have determined that a small number of K3/100s and KPA3s left the factory earlier this year with capacitor C3 installed by mistake on early Revision C KPA3 PC boards.  This part location should be empty on Rev. C KPA3s.  Installation of C3 causes the PA bias supply to oscillate on some KPA3s at approximately 15-20 kHz, resulting in spurious TX sidebands at that spacing from the carrier.

 

S/N & Date Range: A small number of K3/100s within approximately S/N 3000-3138. These radios were shipped approximately April 30 to June 2, 2009.  Upgrade or repair KPA3s sent separately during this time period may also be affected.

 

After June 2, 2009, this problem was corrected for all K3/100s s/n 3139 and later, and all Rev C KPA3s bought as an upgrade. This alert does not apply to Rev C KPA3s shipped after June 2, 2009.

 

Symptom: A strong TX spur, approximately -20 dB down from peak transmit power, spaced approximately 15-20 kHz on each side of the operating frequency.

 

Corrective Action: Remove capacitor C3 from the Rev C KPA3 PCB as described in our detailed Tech note.


A detailed  Tech. Alert App note (.pdf) can be downloaded from:
http://www.elecraft.com/K3/mods/K3%20Technical%20Alert%201.pdf

It contains detailed info and pictures.

Its also linked to from our K3 Mods and App notes Page:
http://www.elecraft.com/K3/k3_app_notes.htm

We apologize for this issue. We thought we had contacted all of the K3 owners affected, but we have found a few we missed, so we are posting this here.

If after reading the Tech. Alert you have questions, please feel free to contact our Tech. group at k3support@... or via phone at 831-763-4211

73, Eric  WA6HHQ


Re: [Elecraft_K3] Re: KBPF3 questions

 

On the list.

73,
Wayne
N6KR

On Nov 17, 2009, at 2:53 PM, Pete Ennis wrote:

Great news on the looking at the 13 Khz filter for AM. How about
sllowing us to tighten up the SSB transmit bandwith?

Keith, K5ENS

--- On Tue, 11/17/09, Wayne Burdick <n6kr@...> wrote:

From: Wayne Burdick <n6kr@...>
Subject: [Elecraft_K3] Re: KBPF3 questions
To: Elecraft_K3@...
Date: Tuesday, November 17, 2009, 3:22 PM
Hi Andy,

I have a couple of questions about the KBPF3 General
Coverage RX
Bandpass Module.

1) If installed in the main receiver does the General
Coverage
module cause any degradation to ham band receive
performance?
It has zero impact.

2) Is an additional wide bandwidth roofing (6 kHz, 13
kHz) filter
required to be added to the main RX when the KBPF is
installed?
Only if you want to listen to AM signals (6 kHz does it for
most
users, 13 kHz gives you wider bandwidth AM).

3) I have seen messages posted recommending the 13 kHz
roofing
filter and am curious if AM and FM transmit can be
enabled through
the 13 kHz filter installed so I can use the K3 for AM
and FM
transmissions on 160, 80, 10 and 6 meters?
AM TX isn't yet possible through the FM filter. We may add
it in the
future -- after carefully testing to make sure signal
purity isn't
compromised.

73,
Wayne
N6KR


Anyone already doing this, and what do you recommend?

de andy, KD3RF / VE2DXY




------------------------------------

Yahoo! Groups Links


Elecraft_K3-fullfeatured@...




Re: [Elecraft_K3] Re: KBPF3 questions

Keith KV5J
 

Great news on the looking at the 13 Khz filter for AM. How about sllowing us to tighten up the SSB transmit bandwith?


Keith, K5ENS

--- On Tue, 11/17/09, Wayne Burdick <n6kr@...> wrote:

From: Wayne Burdick <n6kr@...>
Subject: [Elecraft_K3] Re: KBPF3 questions
To: Elecraft_K3@...
Date: Tuesday, November 17, 2009, 3:22 PM
Hi Andy,

I have a couple of questions about the KBPF3 General
Coverage RX 
Bandpass Module.

1) If installed in the main receiver does the General
Coverage 
module cause any degradation to ham band receive
performance?
It has zero impact.

2) Is an additional wide bandwidth roofing (6 kHz, 13
kHz) filter 
required to be added to the main RX when the KBPF is
installed?
Only if you want to listen to AM signals (6 kHz does it for
most 
users, 13 kHz gives you wider bandwidth AM).

3) I have seen messages posted recommending the 13 kHz
roofing 
filter and am curious if AM and FM transmit can be
enabled through 
the 13 kHz filter installed so I can use the K3 for AM
and FM 
transmissions on 160, 80, 10 and 6 meters?
AM TX isn't yet possible through the FM filter. We may add
it in the 
future -- after carefully testing to make sure signal
purity isn't 
compromised.

73,
Wayne
N6KR


Anyone already doing this, and what do you recommend?

de andy, KD3RF / VE2DXY




------------------------------------

Yahoo! Groups Links


    Elecraft_K3-fullfeatured@...



Re: [Elecraft_K3] KBPF3 questions

Irwin Darack
 

Let me know his response. I may be interested in this too. Nice addition.

Irwin


On Tue, Nov 17, 2009 at 2:48 PM, avavra1@... <avavra1@...> wrote:
 

Group:

I have a couple of questions about the KBPF3 General Coverage RX Bandpass Module.

1) If installed in the main receiver does the General Coverage module cause any degradation to ham band receive performance?

2) Is an additional wide bandwidth roofing (6 kHz, 13 kHz) filter required to be added to the main RX when the KBPF is installed?

3) I have seen messages posted recommending the 13 kHz roofing filter and am curious if AM and FM transmit can be enabled through the 13 kHz filter installed so I can use the K3 for AM and FM transmissions on 160, 80, 10 and 6 meters?

Anyone already doing this, and what do you recommend?

de andy, KD3RF / VE2DXY