Re: [Elecraft] Switching from SSB to CW on K3s

[Joe Subich, W4TV]

Don,

The K3/K3S will automatically handle the offset if you configure it
to do so.  From the K3 Owner's Manual, page 29:


SSB/CW VFO Offset
The K3 can automatically offset the VFO frequency when you switch
from SSB to CW mode, so other stations will hear the correct CW
pitch. See CONFIG:CW WGHT for details.


and page 55:

> CW WGTH   Tap 5 to select automatic VFO offset on SSB/CW mode change
>   (VFO OFS) or no offset (VFO NOR, default). Automatic offset
>   is often used on 6 meters, where mixed-mode QSOs are
>   necessary during fading. Note: Pitch matching will be
>   more accurate if USB is paired with CW REV, and LSB with
>   CW normal.

To answer the original question - with CW WGTH 5 set to VFO OFS I have
no problem tuning a station in SSB and switching to CW without losing
the signal.  The station is  it more "accurate" on 160/80/40 where one
switches from LSB to CW-L than on on 20-6 when switching from USB to
CW-L but it's still relatively close (as accurate as I can match the
correct CW pitch when tuning in SSB).

73,

   ... Joe, W4TV


On 3/14/2016 8:57 PM, Don Wilhelm wrote:

Bob,

Assuming you have the CW signal (in SSB mode) tuned to your sidetone
pitch ---
You will have to re-tune by the amount of your sidetone pitch when
switching to CW.

The K3 (and all other Elecraft transceivers) insert a VFO offset between
SSB and CW equal to the sidetone pitch set into the radio during receive.
SSB has no offset.

In other words, if you are listening to a 600 Hz CW signal when tuned to
a 7040.00 kHz CW signal when in SSB mode (and your sidetone pitch is set
at 600 Hz), you are actually hearing a CW signal at 7039.40 kHz when
tuned to 7040.00 kHz (assuming you have LSB set in SSB mode).
When you switch to CW, you will have to tune to 7039.40 kHz to hear that
same CW signal at 600 Hz - and that is the actual CW transmit frequency.

In other words, in SSB mode, the K2 frequency indication is the
suppressed carrier frequency, but in CW mode it is the transmit
frequency of the CW signal.

To further complicate matters, if you set CW in SSB on in the menu, that
relationship changes.  You will transmit offset from the suppressed
carrier frequency by the amount of the sidetone pitch so your signal can
be heard by other stations tuned for SSB.

73,
Don W3FPR

On 3/14/2016 8:28 PM, Bob Novas wrote:

When I'm in SSB mode and I tune down to the CW frequencies, I can easily
tune in a CW signal. Then, I switch to CW mode, and the CW signal is gone
because I'm on the wrong sideband. Even if I'm on the right sideband,
the CW
signal disappears.  Shouldn't I be able to switch from SSB to CW and not
lose a CW signal?  Am I doing something wrong?  Thanks, Bob - W3DK



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[Elecraft] FS 1.8K K3 FILTER

[brian]

Removed from a 1 year old K3.
$110 shipped

73 de Brian/K3KO
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Re: [Elecraft] Switching from SSB to CW on K3s

[Richard Ferch]

There are two parts to this: the correct sideband, and the correct 
frequency. On the K3/K3S, CW is on lower sideband, and CW-REV is on 
upper sideband. On bands where you use LSB for SSB, switching to CW will 
still be on the correct sideband, but on bands where you use USB for 
SSB, you will need to use CW-REV to get the sideband to match.


The other part is the frequency offset. You can tell the K3/K3S to do 
the frequency offset automatically when changing modes by using the 
CONFIG:CW WGHT menu item and tapping the 5 (AGC) button until the lower 
(VFO B) display reads VFO OFS.


73,
Rich VE3KI


W3DK wrote:


When I'm in SSB mode and I tune down to the CW frequencies, I can easily
tune in a CW signal. Then, I switch to CW mode, and the CW signal is gone
because I'm on the wrong sideband. Even if I'm on the right sideband, the CW
signal disappears.  Shouldn't I be able to switch from SSB to CW and not
lose a CW signal?  Am I doing something wrong?  Thanks, Bob - W3DK


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[Elecraft] K3 For Sale with options

[Ron Durie]

Elecraft K3/100; Late #7504, which includes all factory upgrades.  
This is an excellent K3, out of the box.

K3SYN3AUPG newest Synthesizer option installed.  This significantly improves
receiver performance.  

KXV3A Receive ANT IF out and XVRTR Interface board.  
KIO3 I/O board option.  

Standard KTCXO3 Reference Oscillator, 0.5PPM. 
KBPF3 General Coverage Receive option.  

Standard 5 pole 2.7 kHz crystal filter.
KAT3 Internal automatic antenna tuner option.  

In "Like New" condition.  No scratches or blemishes.  Even all the front
panel knobs are new.  One owner nonsmoker.  It is 18 months old. 

This is the 4th K3 I have built.  When I build, these I treat every
connector pin with Caig De-Oxit Pro gold solution, to prevent pin Oxidation;
intermittent connections; easy connector insertion; and very low contact
resistance.  

Includes PowerPole Power cable; Allen wrenches; PA Jumper; and all manuals. 

Contact me (Ron)off line at:  WB4OOA at gmail.com 
$2795 Shipped CONUS.  PayPal; add 2%.  Check ok when cleared.  Pictures
available upon request. 






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Re: [Elecraft] Switching from SSB to CW on K3s

[Don Wilhelm]

Bob,

Assuming you have the CW signal (in SSB mode) tuned to your sidetone 
pitch ---
You will have to re-tune by the amount of your sidetone pitch when 
switching to CW.


The K3 (and all other Elecraft transceivers) insert a VFO offset between 
SSB and CW equal to the sidetone pitch set into the radio during receive.

SSB has no offset.

In other words, if you are listening to a 600 Hz CW signal when tuned to 
a 7040.00 kHz CW signal when in SSB mode (and your sidetone pitch is set 
at 600 Hz), you are actually hearing a CW signal at 7039.40 kHz when 
tuned to 7040.00 kHz (assuming you have LSB set in SSB mode).
When you switch to CW, you will have to tune to 7039.40 kHz to hear that 
same CW signal at 600 Hz - and that is the actual CW transmit frequency.


In other words, in SSB mode, the K2 frequency indication is the 
suppressed carrier frequency, but in CW mode it is the transmit 
frequency of the CW signal.


To further complicate matters, if you set CW in SSB on in the menu, that 
relationship changes.  You will transmit offset from the suppressed 
carrier frequency by the amount of the sidetone pitch so your signal can 
be heard by other stations tuned for SSB.


73,
Don W3FPR

On 3/14/2016 8:28 PM, Bob Novas wrote:

When I'm in SSB mode and I tune down to the CW frequencies, I can easily
tune in a CW signal. Then, I switch to CW mode, and the CW signal is gone
because I'm on the wrong sideband. Even if I'm on the right sideband, the CW
signal disappears.  Shouldn't I be able to switch from SSB to CW and not
lose a CW signal?  Am I doing something wrong?  Thanks, Bob - W3DK



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Re: [Elecraft] P3 v1.59 & SVGA v1.33 BETA now available for download

[Alan]

On 03/14/2016 01:47 PM, Paul Saffren N6HZ wrote:

For those of you trying out the #RCF command, first set your fixed mode to
"SLIDE" as opposed to half-span, full-span, otherwise the P3 will recenter
the cursor as it moves to either edge.


Or "Static".

Alan N1AL



-Paul



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Re: [Elecraft] Switching from SSB to CW on K3s

[Nr4c]

Your SSB bandwidth (passband) is prob 2.7 kHz and your CW passband might be 
400. You not only have to consider the side and but your side tone offset and 
bandwidth. 

There is a setting in the CONFIG menu to make this work however. 

Sent from my iPhone
...nr4c. bill


> On Mar 14, 2016, at 8:28 PM, Bob Novas  wrote:
> 
> When I'm in SSB mode and I tune down to the CW frequencies, I can easily
> tune in a CW signal. Then, I switch to CW mode, and the CW signal is gone
> because I'm on the wrong sideband. Even if I'm on the right sideband, the CW
> signal disappears.  Shouldn't I be able to switch from SSB to CW and not
> lose a CW signal?  Am I doing something wrong?  Thanks, Bob - W3DK
> 
> 
> 
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[Elecraft] Switching from SSB to CW on K3s

[Bob Novas]

When I'm in SSB mode and I tune down to the CW frequencies, I can easily
tune in a CW signal. Then, I switch to CW mode, and the CW signal is gone
because I'm on the wrong sideband. Even if I'm on the right sideband, the CW
signal disappears.  Shouldn't I be able to switch from SSB to CW and not
lose a CW signal?  Am I doing something wrong?  Thanks, Bob - W3DK

 

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[Elecraft] I need help from some in the know

[Robert 'RC' Conley]

-- I'm running a K3 #8361/100/P3. Using MMtty on my Dell Laptop computer.
With a K3YY FSK optoisolator interface and a USB sound card.
I disconnected my RS232 P3 cables and antennas and sound card a week ago
before we experienced 24" of rain in 5 days here in West Monroe Louisiana
Today I plugged everything back in. I NOW am unable to transmitt FSK RTTY.
The sound card decodes RTTY however it does not transmit RTTY. The K3 keys
in SSB and CW not RTTY. This feel like a software issue to me. I have had
several auto upgrades on my Window 7 pro OS. The software uses port 4 and
port 5. Maybe the upgrades changed a setting. I do not know
73 RC
KC5WA

Live Long and Prosper
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Re: [Elecraft] Lightweight Windows Laptop/Tablet for Portable

[Luis V. Romero]

Charlie:

I have had good success with the Lenovo Yoga 2 11 ($400).  It's actually my
wife's machine, but I use it when we travel to places.  

It's not the fastest machine, and the screen is not the biggest, but its
small, light, flat, easy to use, quiet and runs everything I need to connect
to both a K3 and a TS590.  I use a Microham Microkeyer 1 when taking my
radio on the road.  Used with care, you can get around 3-4 hours on the
standard battery, and bigger batteries are also available on Amazon. I've
not needed these since there is power where I have taken this setup.

The two biggest detriments for this machine is that it has only two USB
ports.  But the easy fix is a 7 port powered USB expander, which fixed that
issue and add little weight to the package. The other detriment is the nutty
on board touchpad, but a $5 Wireless Mouse fixes that just fine

I don't use the touch screen at all.  The keyboard, as in all ThinkPad
computers, is superb for touch typing.

Regards

Lu Romero - W4LT
K-Line

-=---=--
I'm looking for suggestions for a lightweight laptop or 2-in-1 tablet type
of machine to take while hiking/backpacking portable.  I also want to be
able to recharge it with my solar panel/charger/12V Lithium or SLA battery.

I'd love to get the Microsoft Surface Pro 4 but don't want to spend north
of $1,000!

What are others using for a portable Windows that will run products like
HDSDR, HRD. PSK, etc.?

I'd like it to be under 3 pounds if possible.

Thanks,
Charlie  K0CKH

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[Elecraft] KPA500 Asterix staying on

[Tony G6GLP]

Hi All,
I thought some of you might like to hear about my little exploit.
It concerns my KPA500 going deaf. I know a lot has been said here about
it and how to fix it. Well mine seemed to develop a deafness on rx in
OPER mode. When it happened I noticed that there was an asterix on the
display and couldn't understand why.

The story is that on one of my antenna ports from the ATU I have several
Antennas which get switched in by relays driven from a home made box
that decodes the band info from the K3. This weekend I put up another
antenna and did away with all the switching but left the control box
connected and switched on. However when I switched it off the RX stayed
ok until the amp went into TX and wouldn't go back to rx. The asterix
stayed on. It seems the power drain on the data lines etc was sufficient
to drag them low and prevent the "PTT" going back high. Removal of the
controller or re powering it solved the problem.

The problem was self inflicted but I did solve it quickly but thought
the story maybe of help to some one else who does the same silly thing.


73 de Tony G6GLP



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[Elecraft] Lightweight Windows Laptop/Tablet for Portable work

[Bryan Brauer]

I have been using an ACER Aspire Switch 10 for this purpose for not quite a 
year.  Not a speed demon, but seems to work fine.  I got mine at Costco for 
less than $300, with a 1 year subscription to MS Office included.  Mine came 
with Windows 8.1.  I think the current model has Windows 10.
It uses a very small wall wart with 12V DC output, so should meet your power 
needs.   BRYAN BENNO BRAUER, PEKI6GGH
  
  
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[Elecraft] Elecraft equipment for sale

[k7ua]

I have the following Elecraft equipment for sale.  All in great condition, just 
no longer need it. 
K144XV 2M internal transverter for K3 $325 
KFL3B-FM  FM filter for K3  $125 
KXV3-2 transverter interface for earlier K3 $75 
PR6 6 meter preamp for K3  $80 
KPA500 amplifier $1800 
KPA500 price plus shipping.  The rest shipped free USA. 
If you buy the transverter and FM filter and you need the KXV3 for your early 
K3 
you can have it for free. 
73, Bryce K7UA 
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Re: [Elecraft] Lightweight Windows Laptop/Tablet for Portable work

[Josh Walton]

Portable I think is the key word.  I use the following little windows tablet:

http://www.microcenter.com/product/439773/TW700_Tablet_-_Black 

I always buy the open box ones $52 (I’ve bought several for friends who don’t 
live near a MircoCenter.)

They require an external USB dongle and I recommend an external travel mouse.  
You should be able to get both for a few dollars.
Also the onboard storage is small, so uninstall office 360, their virus 
software, and stick an external SD chip where you install all additional 
software packages to.

It’s a super little performer, extremely compact, energy efficient (charges 
over a 5W USB cable) it light and surprisingly durable.  
I take mine on travel and hiking trips.  It runs fldigi, RMS express & FSQCall 
flawlessly.

Cheers!



> Date: Sun, 13 Mar 2016 16:55:16 -0500
> From: Chas H <2mysys...@gmail.com>
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] Lightweight Windows Laptop/Tablet for Portable
>   work
> Message-ID:
>   
> Content-Type: text/plain; charset=UTF-8
> 
> I'm looking for suggestions for a lightweight laptop or 2-in-1 tablet type
> of machine to take while hiking/backpacking portable.  I also want to be
> able to recharge it with my solar panel/charger/12V Lithium or SLA battery.
> 
> I'd love to get the Microsoft Surface Pro 4 but don't want to spend north
> of $1,000!
> 
> What are others using for a portable Windows that will run products like
> HDSDR, HRD. PSK, etc.?
> 
> I'd like it to be under 3 pounds if possible.
> 
> Thanks,
> Charlie  K0CKH
> 
> 

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Re: [Elecraft] P3 v1.59 & SVGA v1.33 BETA now available for download

[Paul Saffren N6HZ]

For those of you trying out the #RCF command, first set your fixed mode to
"SLIDE" as opposed to half-span, full-span, otherwise the P3 will recenter
the cursor as it moves to either edge. 

-Paul



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Re: [Elecraft] P3 v1.59 & SVGA v1.33 BETA now available for download

[Paul Saffren N6HZ]

One important note:  PLEASE email me directly with any bugs and/or questions. 
Do not email customer support for beta releases.  

My email address is pauls at you know where dot com. 


Thanks and 73, 

Paul




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[Elecraft] KX3 CW Muting on Strong Signal

[Scott Zastoupil via Elecraft]

During the Wisconsin QSO Party this weekend I experienced on a few occasions 
were a strong signal was near zero beat (maybe +/-50Hz or better), but all I 
could hear was "thumping" of the signal.  So these people were calling me, but 
I could not hear the 600Hz sidetone.  In order for me to hear them, I enabled 
RIT and tuned a few hundred hertz up.  I could see them in the passband of 
panadapter.
- Issue was with about 5 strong signals- Filter centered and 200-400Hz wide- 
Signal was visible near zero beat on NaP3 panadapter within pass band.  I/Q 
input to PC for visual spectrum only.  Not using audio from PC.- Preamp off in 
many/all cases on 40 meters.- Listening to audio via stereo headphones direct 
to radio.- Firmware updated last fall.
Any ideas or known issues in this scenario?

Scott, KB0KFX
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Re: [Elecraft] P3 v1.59 & SVGA v1.33 BETA now available for download

[Dave Cole]

Paul,

Thank you and everyone involved for the additional features!  I did not
know about the counter increment...  Time to build more macros...

The Center offset has been so useful!  I hit a button, and the DX moves
to the left edge, and I see the pileup on the right...  

I have had a bit of a chance to test this over the past few weeks, and
it makes a huge difference in speed of nailing a station.

-- 
73's, and thanks,
Dave (NK7Z)

For software/hardware reviews see:
http://www.nk7z.net

For MixW support see:
https://groups.yahoo.com/neo/groups/mixw/info

For SSTV help see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info



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Re: [Elecraft] 10 MHz external reference - GPSDO

[Bill Frantz]

The XY RTTY tuning ovals are based on the mark and space signals 
which are 170 Hz apart. I can easily tune RTTY signals with the 
10 Hz tuning step in the K3, so 10 Hz stability on both the 
transmitter and the receiver should be good enough for reliable operation.


With the low stability TCXO and no external reference, I get 
good results with RTTY. I don't notice shifts in the ovals.


73 Bill AE6JV

On 3/14/16 at 12:10 AM, g...@ka1j.com (Gary Smith) wrote:

Something I have wondered since running MMTTY and looking at 
the XY scope is, why do I see the XY ovals shifting clockwise 
as the station is transmitting. I find decoding is best when 
the ovals are as close to straight vertical & horizontal. If I 
let them rotate, I lose the cypher so I have to actively adjust 
VFO A to maintain their proper spacing.


---
Bill Frantz|The nice thing about standards| Periwinkle
(408)356-8506  |is there are so many to choose| 16345 
Englewood Ave
www.pwpconsult.com |from.   - Andrew Tanenbaum| Los Gatos, 
CA 95032


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Re: [Elecraft] Wizkers:Radio KX3/KXPA100/PX3 utility and rig controller

[Bob N3MNT]

Very nice app.  Worked well.  Looking forward to android version for usb
enabled tablet.

Thank You

N3MNT



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[Elecraft] P3 v1.59 & SVGA v1.33 BETA now available for download

[Paul Saffren N6HZ]

I'm releasing a follow up BETA since the last release.  Recently we were able
to solve some additional bugs and develop a couple of new features with the
P3 & SVGA that are significant enough to warrant a separate release.  Our
website has also been updated with instructions on how to download and
install BETA release packages. 

Beta firmware and instructions can be found here: 
http://www.elecraft.com/software/P3/elecraft_p3_software.htm


Release notes for P3 1.59 / SVGA 1.33

 MCU 01.59 / 3-7-2016

Version 01.59 requires SVGA firmware 01.33 to support all SVGA features.
(notes marked with *** are those added since the last beta)

* P3 commands in keyboard macros: Added support to allow P3 commands to be
embedded in SVGA keyboard macros.  When entering a keyboard macro using a
USB keyboard attached to the P3/SVGA, P3 commands can now be intermixed with
K3 commands by preceding the with the '#' character.  Example: set up a
macro to set the K3 to PSK31, frequency 14.070, P3 span of 100 kHz, fixed
tune enabled:   
FA0001407;MD6;DT3;#SPN001000;#FXT1;

* SVGA keyboard macros as function keys: The first 8 SVGA keyboard macros
can now be executed from the 8 front panel function keys.  First, using a
keyboard, program the macro and make sure to save it into one of the first 8
locations (mem 1 - 8).  Then on the P3, press the MENU button and using the
encoder, select the SVGA menu and press the encoder to enter. Then using the
encoder, choose "Macro 1" through "Macro 8",  then press the function key
(short tap or long hold) to map the macro to the function key. 

* Enable/disable TX sensing at the TxMon coupler: Added TxSensEn to TxMon
sub-menu.  This allows enabling/disabling of transmit sensing at the
coupler.  For K3 and K3S users, TxSensEn can be set to "disabled", which
will use the serial connection from the K3 to determine the TX state.
Setting TxSensEn to "enabled" will use forward power sensed at the TxMon
coupler to determine TX state (useful for non-Elecraft radios). 

*** New #RCF command: "Relative Center Frequency" applies an offset to the
center frequency based on the passed argument.  Usage: #RCFsnn;  Where:
's' is the sign + or -, nn is the offset in Hz.  For example, if the P3
is set to a 30 kHz span and you would like to position the cursor on the
left edge: #RCF+015000;   Using #RCF without any arguments returns the
difference in Hz between the center frequency and the vfo frequency. 

* K3S attenuator support:  The P3 now properly scales the display when the
four-step attenuator in the K3S is enabled.

* SWR meter blanked:  Both the analog and digital SWR displays are now
blanked whenever the transmit power is too low to give a valid reading.

* Serial #DSM command:  The Display Mode (#DSM) command now controls the
Transmit Monitor's power/SWR meter display as well as enabling and disabling
the waterfall window.  #DSM0 = Spectrum display only, #DSM1 = Spectrum +
waterfall, #DSM2 = Spectrum + meters, #DSM3 = Spectrum + waterfall + meters.

* New #FON command:  The display font can now be selected via a serial
command.  #FON0 = 5 x 7 pixels, #FON1 = 7 x 11 pixels, #FON2 = 9 x 14
pixels.

* New #XCV command:  The transceiver type can now be selected via a serial
command.  #XCV00 = "K3", #XCV01 = User-defined, #XCV03 = 455 kHz IF, etc. 
The command uses  the same number order as in the "Xcvr Sel" menu item.

* Transceiver definition bug fix - Exiting:  When exiting the "Xcvr Def"
menu page, if the user-defined transceiver is already selected, it will
reflect the new values inmmediately, rather than having to re-select it.

* Transceiver definition bug fix - IF Invert:  The USER transceiver that is
defined in the "Xcvr Def" menu item may now specify "Not inverted" IF tuning
even if the "K3" control language is selected.

* SVGA resolution / main waterfall bug fix:  The main waterfall height had
been switching to the default value after changing SVGA resolution.

* VFO B cursor = VFO DATA A bug:  The VFO B cursor had been matching the VFO
A cursor in DATA A mode, even when VFO B was in a different mode.

*** Bitmap Upload bug:  Fixes a bug in which the waterfall area was omitted
from a bitmap capture when the TXMON meters were visible.  



P3SVGA 01.33 / 3-7-2016

* Center Frequency in Tracking mode:  Fixed an old bug that caused the VFO A
cursor to reset to center of screen when VFO A was tuned after the user had
adjusted the center frequency offset using the CENTER function in tracking
mode.  

* SVGA Keyboard: 
Added support to allow P3 commands to be embedded in SVGA keyboard  
macros.  
Added support so P3 can execute keyboard macros from front panel 
function
keys. 
Keyboard / USB thumbdrive can be used when not in data display mode.

Cleaned up the text message sending, and use of the IM character '|' for
better  handling of short text messages.  

*** Scratchpad:  Removed "replay buffer" and replaced it with a scratchpad

Re: [Elecraft] 10 MHz external reference - GPSDO

[Edward R Cole]

Eric,

Thanks for the correction/update.  That fits my measurements, 
exactly.  I recall about the time the EXREF came out the better spec 
was given on the TCXO03-1.  Regarding the use of wrong part 
terminology (TCXO-3) its just sloppy memory of the exact product 
number.  I think most knew what is being described.  Interesting that 
the TCXO03-1 is ten times better stability over the TCXO.


The EXREF reduces 0.5ppm to 0.1ppm on my K3, which is what was cited, 
I believe.


73, Ed - KL7UW

At 08:37 AM 3/14/2016, Eric Swartz - WA6HHQ, Elecraft wrote:

Hi Ed,

Minor note on our TCXO part numbers:

The tighter temp stability TCXO (0.5 ppm typical) is actually 
Elecraft part number "TCXO3-1". This is the p/n that shows on the 
K3S order page and in the K3S kit manual as an upgrade.


The standard TCXO (5 ppm) supplied with the K3S and K3 has the part 
number "E660033".


Regards,

Eric
elecraft.com

On 3/13/2016 6:14 PM, Edward R Cole wrote:

Guys<

TCXO's use temperature compensating components to try to keep 
frequency stable.  They work fairly well if you are at lower 
frequencies or not multiplying an LO 18 times.  Better is the OCXO 
(which uses a heater inside an insulated "oven" to better keep 
temperature effects isolated).


The EXREF utilizes the better stability of 10-MHz sources to 
correct the drift of the TCXO.  I does that at a fixed interval in 
between which both TCXO-1 and TCXO-3 will drift.  Per Elecraft's 
specifications on page 8 the TCXO-3 is 5 times more stable than the 
TCXO-1.  I have no idea over what time interval the specs are 
cited, but most assuredly its more than 4 seconds.




73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com
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Re: [Elecraft] Foot Switch wiring question...

[Amateur Radio Operator N5GE]

I agree.  I used twisted pair for a long run up the tower to a pesky
Davis WX Station.  It worked great!


On Sat, 12 Mar 2016 17:09:13 -0500, you wrote:

>Clay,
>
>Use twisted pair wire between the switch and the RCA Plug.  The tighter 
>the twist the better.
>If you use that, there is no need for shielding.
>If you do use a shield, connect it to the outside of the enclosure of 
>the K3S (the RCA jack is grounded, but not to the outside of the enclosure).
>
>73,
>Don W3FPR
ARS N5GE

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Re: [Elecraft] 10 MHz external reference - GPSDO

[Eric Swartz - WA6HHQ, Elecraft]

Hi Ed,

Minor note on our TCXO part numbers:

The tighter temp stability TCXO (0.5 ppm typical) is actually Elecraft part 
number "TCXO3-1". This is the p/n that shows on the K3S order page and in the 
K3S kit manual as an upgrade.


The standard TCXO (5 ppm) supplied with the K3S and K3 has the part number 
"E660033".


Regards,

Eric
/elecraft.com/

On 3/13/2016 6:14 PM, Edward R Cole wrote:

Guys<

TCXO's use temperature compensating components to try to keep frequency 
stable.  They work fairly well if you are at lower frequencies or not 
multiplying an LO 18 times.  Better is the OCXO (which uses a heater inside an 
insulated "oven" to better keep temperature effects isolated).


The EXREF utilizes the better stability of 10-MHz sources to correct the drift 
of the TCXO.  I does that at a fixed interval in between which both TCXO-1 and 
TCXO-3 will drift.  Per Elecraft's specifications on page 8 the TCXO-3 is 5 
times more stable than the TCXO-1.  I have no idea over what time interval the 
specs are cited, but most assuredly its more than 4 seconds.


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Re: [Elecraft] KIO3B

[Mike Harris]

Many thanks to all who have taken the time to respond to this thread. I 
will continue to try and resolve this issue and as a first step I 
plugged the K3 USB into my Toshiba NB510 Netbook, fired up L32 (slightly 
earlier version) and the CW machine and the software/DTR CW was fine.


The netbook has nowhere near the power of the Dell desktop so 
investigation is in order.


Regards,

Mike VP8NO

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Re: [Elecraft] 10 MHz external reference - GPSDO

[Don Wilhelm]

The external reference is only applicable to the K3/K3S with the EXREF 
option.


73,
Don W3FPR

On 3/14/2016 3:51 AM, Cortland Richmond wrote:


50% OT but...

I'm not complaining about stability, mind; the KX3 temperature 
compensation routine works really well, but if I use a GPSDO-clocked 
synthesizer to generate my KX3's clock, will that stabilize the 
on-board synthesizer?  I have a PTS-160.


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Re: [Elecraft] 10 MHz external reference - GPSDO

[Cortland Richmond]

On 3/13/2016 9:08 AM, Don Wilhelm wrote:

I think everyone is ignoring something here.  What causes the frequency
drift in the first place?
It is temperature changes - the designation TCXO signifies


50% OT but...

I'm not complaining about stability, mind; the KX3 temperature 
compensation routine works really well, but if I use a GPSDO-clocked 
synthesizer to generate my KX3's clock, will that stabilize the on-board 
synthesizer?  I have a PTS-160.


Cortland Richmond
KA5S
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Re: [Elecraft] 10 MHz external reference - GPSDO

[Gary Smith]

Something I have wondered since running MMTTY and looking at the XY 
scope is, why do I see the XY ovals shifting clockwise as the station 
is transmitting. I find decoding is best when the ovals are as close 
to straight vertical & horizontal. If I let them rotate, I lose the 
cypher so I have to actively adjust VFO A to maintain their proper 
spacing.

I always figured that rotational motion was caused by the time being 
shifted as temperatures increase in the TCO ovens and they do resolve 
as the radio cools down, only to experience heat and try and resume 
with the next transmission.

I see this same effect when in transmit albeit not as bad as some do 
on the other end. So my thoughts turn to what mitigates this effect 
on my end and I guess it has to be the TCXO crystals and their 
stability and its with the looser ones causing the greatest motion 
and lack of stability..

I have the higher rated TXCO-3 that supposedly gives basically stable 
transmit down to the occasional rated stability at I believe; to 
.5ppB, a many times better end at the final result.

So I wonder if in the real world, if my assumptions are correct and 
having a decent quality time medium to keep the GPDSO in persistent 
good order will keep the twisting of the TY scope bars more secure in 
place and better that the find the locations for best reading of the 
data?

And further because both rigs are experiencing different temperature 
shifts through the messages creation, it requires a greater stability 
of both top gave that high quality handshake. to stop this rotation 
of the XY coordinates from loosing connection?

I ordered one of the BG7TBL 2015-09-17 Disciplined GPDSO and find it 
uses different chips. These give a 5+ at 10x 000 000 000 800  The 
earlier on the Morion 201 gave a 1+-deviation at the same range. 
miniscule but somethig to consider. I'm hoping if my K3s is attached 
to this GPDSO and the ham at the other end is so configured so that 
neither unit will have grand shifting and a solid - uninterrupted 
signal will be the delightful norm.   
 t
So I'm hoping this strong desire to tame the K3s rock solid will 
result in perfect tight linearity.

I'm looking forward to seeing how well this goes.

73,
Gary
KA1J
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