Re: [Elecraft] Neoprene Ring for The Big Knob

[Bernhard.Horst]

Hi Dick,

Order it at QRP Shop in Berlin :-)

http://www.qrp-shop.biz/

They have it available. Mine is already on

73s
Bernie
DL5RDP


-Ursprüngliche Nachricht-
Von: Dick Grolleman [mailto:groll...@planet.nl] 
Gesendet: Montag, 7. März 2016 19:29
An: Elecraft Reflector
Betreff: Re: [Elecraft] Neoprene Ring for The Big Knob

Hi all,

I would like the new ring, but not for $ 50.64 shipping. This is getting 
really ridiculous these shipping prices.

73 de Dick PA3FQA

-Oorspronkelijk bericht- 
From: Fred Jensen
Sent: Monday, March 07, 2016 7:19 PM
To: Elecraft Reflector
Subject: [Elecraft] Neoprene Ring for The Big Knob

Several asked how I liked it.  I finally consulted the manual, realized
how the knob went together, and put the new ring on.

While I seem to be able to adapt to many things that bug others, and I
had adapted to the original knob/ring, I really do like the feel of this
one. There's a significant increase in the tactile sense on my fingers,
and I seem to be able to set a frequency to 1 Hz more easily.  It's
worth the $16 + USPS priority to me.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
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Re: [Elecraft] OT Cat 7 Ethernet Cable

[Jim Brown]

On Mon,3/7/2016 8:56 PM, Clay Autery wrote:

On 3/7/2016 9:50 PM, Jim Brown wrote:


The Ethernet birdies/carriers I listed are from the data stream, NOT
from the PSU. Of course the PSU often generates trash, but it's
DIFFERENT trash. :)

That's a very definitive statement...  while an unlikely cause of
multiple HF region emissions, switch-mode PS frequently switch at
frequencies in/around HF frequencies.


Actually, switch-mode power supplies run in the range of 10-50 kHz, NOT 
at HF.  It is the unfiltered high order harmonics that we hear at HF.





Wireless radios that are improperly designed or shielded can also be the
culprit.

I can't see any way that a 900 MHz or 1.8 GHz radio can cause RFI at
HF. It is the baseband digital signals that have HF components.

A wireless "router" radio is a radio just like any other...  they take
an input signal, massage it and send out a signal...  they are subject
to the SAME design issues as any other radio.  IF frequency(ies),
mixers, oscillators, et al.  Subject to the same mixing products and
improperly shielded can radiate any product, harmonic, etc.


But the IF and mixing products are NOT at HF. Trash from WiFi systems is 
produced by the baseband digital electronics and the switch mode power 
supplies, NOT from any part of the RF system.



Not having a separate logical and chassis ground can be a problem...

WRONG -- that is a CAUSE of problems, not a solution. See Henry Ott's
classic text on EMC.

Perhaps I should have been more precise...  logical ground and a chassis
shield.  Although, there ARE in fact many electronic devices where the
device itself has an isolated logical "ground" and the entire device is
located WITHIN a totally separate shield from end to end essentially
floating the devices on each end and the signals inside their own "space".


As Ott has observed, there are holes in that design logic.



What may have confused you is that I was considering both well-designed
devices with chassis designs that act as or contribute to the shielding
vs. the majority of consumer grade devices which do NOT have a shielding
chassis...  e.g. plastic case with venting, etc.


Yes, I did miss that.


MOST of this consumer
grade stuff has 8P8C modular jacks that are designed to accept UTP RJ-45
connectors made of plastic thus they do not provide any means for a
metal shielded connector (a la STP CAT 5/5e/6+ or all CAT 7 and above.
IF you didn't do anything else, the STP cable and connectors would do
little to assist because they are NOT connected to the chassis/supplemental 
shield and have no path to ground.


Exactly right.


On a device with a plastic case providing no overall shielding and/or if
the radio shield or PS shield, or any other potential "trash" maker
(common OR differential) circuit is not properly designed and/or
shielded, and/or filtered, or other mitigating method, you're peeing
into the wind by simply adding shielded cables.  You can connect a drain
to ground from the cable/connector housing and that will help


I don't get "drain to ground."

It IS possible to make unshielded equipment RF-quiet with proper circuit 
layout and construction. The return for current in a circuit trace over 
a continuous "ground" layer flows in the very small area of the "ground" 
trace directly under the circuit trace, forming a transmission line. In 
effect, the "ground" layer shields the conductor. Thia single "ground" 
layer technique is called "microstrip; a second "ground" layer on the 
other side of the trace provides much more shielding, and that 
construction is called stripline.


With this sort of construction and no chassis, shield return would need 
to be to an island of copper at the perimeter of the board, and all 
cable shields and external "ground" paths (like power supply) would need 
to be terminated to that perimeter shield. As with a chassis, shield 
current stays "outside the box." But if that "ground" layer is broken 
under the signal trace, return current follows whatever path left to it 
by the whim of the PC board layout "artist," which often forms a large 
loop that includes the chassis or some long return path on the board. 
Now, it's no longer a transmission line, it's an antenna (and a magnetic 
loop), so signal escapes both by antenna action and magnetic coupling.



...  BUT
what you really have to do to clean up a non-FCC compliant device
putting out harmful/unwanted IF is to either/both/hybrid:

1) Construct an internal shield that will block the radiation from
leaving the enclosure AND connects to the signal cable shields and
thence to ground...  OR, if you can't do it internally,...
2) create and EXTERNAL shield with the same electrical characteristics.
3) Some hybridization of the 1 and 2.

Bottom line...  we said the exact same thing...


Not quite. What I've observed is that MOST of the noise we hear on HF is 
common mode current on cables connected to the device, NOT due to the 
device being poorly shielded. Yes, SOME 

Re: [Elecraft] K3EXREF question

[Edward R Cole]

The K3EXREF circuit is essentially a AFC (sort of) where a highly 
accurate 10-MHz reference is used to measure the frequency of the 
TCXO and send a frequency correction "word" to control the TCXO so 
that the error from 49.380 MHz is removed.


As I understand it this comparison is done about every 
4-seconds.  The TCXO drifts with temperature so it will definitely 
change when you first power on the K3.  This drift will slow at some 
point and hover around a offset level (mine is about 49.380.080.  The 
TCXO is actually tuned to correct from that so REF*CAL is only 
showing the amount of offset that is being corrected.  Output of the 
TCXO is not 80-Hz high.  It would be if the EXREF did not correct it.


I have the K3/10 so only have the 12w PA which does not add as much 
heat in transmit as the 100w PA.  So that lessens the amount of 
temperature drift of the TCXO.  The TCXO-3 is better than the std 
TCXO so the improvement the EXREF makes is better with it.  On 
transmit on 28-MHz using the EXREF, I see approx. +/- 2 Hz frequency 
error with the TCXO-3.  This is equivalent to 0.1 ppm.  Without the 
EXREF my error is five time larger or about +/- 14 Hz.


There is still a slight amount of frequency drift since the TCXO is 
operating normally in between the times the 10-MHz reference checks 
and corrects frequency error.  This explains why a small amount of 
drift still occurs vs what happens with a phase-locked 
oscillator.  The result is that the frequency will appear to look 
like a ramp waveform over the 4-second interval between corrections.


The reason for choosing this form of frequency control is it 
preserves the excellent low phase noise of the K3.  PLL are difficult 
to make with as low phase noise.


If any of this is incorrect, perhaps one of the Elecraft engineers 
will correct what I wrote.


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

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[Elecraft] K3 <-> K3S and Remoterig

[Andy Wood]

Hello,

Are there any compatibility issues using a K3 to control a K3S with
Remoterig? Specifically, there are extra preamps and attenuator settings
available in the K3S that aren't available in the K3. How would these be
handled with a K3 as the "local" device?

Regards,

Andy  VK4KY



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-K3S-and-Remoterig-tp7615021.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] OT Cat 7 Ethernet Cable

[Clay Autery]

On 3/7/2016 9:50 PM, Jim Brown wrote:
> On Mon,3/7/2016 6:47 PM, Clay Autery wrote:
>> Any device putting out RFI as common mode are NOT in spec
>
> Perhaps, but such devices are VERY common in the consumer world. I
> have no contact with the pro world of IT.

Yep... just like a LOT of consumer grade electronics, the manufacturers
intentionally ignore or falsify the FCC certifications.  Generally, you
get what you pay for.

>> A non-inclusive list of causes:
>>
>> Badly designed and/or shielded switch mode power supply (wall wart OR
>> internal).
>
> The Ethernet birdies/carriers I listed are from the data stream, NOT
> from the PSU. Of course the PSU often generates trash, but it's
> DIFFERENT trash. :)

That's a very definitive statement...  while an unlikely cause of
multiple HF region emissions, switch-mode PS frequently switch at
frequencies in/around HF frequencies.

>>   A wall wart can radiate via the DC cord to the device and/or
>> send the signal into the device via the DC cable and then radiate via
>> the chassis or signal cables..  USUALLY internal PSs are adequately
>> shielded... but poor input filters or none at all can let the bad stuff
>> through.
>
> Trash that radiates to our antennas is COMMON mode, not differential
> mode, and common mode is caused by improper return paths, and it
> cannot be "filtered." Filtering affects differential mode trash.

As I said, it is a NON-inclusive list and there are multiple ways to
generate "trash".
>
>> Wireless radios that are improperly designed or shielded can also be the
>> culprit.
>
> I can't see any way that a 900 MHz or 1.8 GHz radio can cause RFI at
> HF. It is the baseband digital signals that have HF components.

A wireless "router" radio is a radio just like any other...  they take
an input signal, massage it and send out a signal...  they are subject
to the SAME design issues as any other radio.  IF frequency(ies),
mixers, oscillators, et al.  Subject to the same mixing products and
improperly shielded can radiate any product, harmonic, etc.
>
>> Not having a separate logical and chassis ground can be a problem...
>
> WRONG -- that is a CAUSE of problems, not a solution. See Henry Ott's
> classic text on EMC.
Perhaps I should have been more precise...  logical ground and a chassis
shield.  Although, there ARE in fact many electronic devices where the
device itself has an isolated logical "ground" and the entire device is
located WITHIN a totally separate shield from end to end essentially
floating the devices on each end and the signals inside their own "space".

>> Shielded cables work best in my experience when you can create an
>> isolated chassis (or supplemental Faraday cage type superior to the
>> chassis (or internal to a plastic case) where the outer shield of the
>> cable and connector housing can be connected in *one continuous shield*
>> around the device(s) and the cable, etc, etc...
>
> EXACTLY WRONG. For shielding to be effective, it must be continuous,
> including a termination to the shielding enclosure at both ends.
> Again, see Ott.

Read what I wrote again.  Chassis/shield to cable connector shield to
cable shield to connector shield on the other end to the
chassis/shield.  One continuous shield...
What may have confused you is that I was considering both well-designed
devices with chassis designs that act as or contribute to the shielding
vs. the majority of consumer grade devices which do NOT have a shielding
chassis...  e.g. plastic case with venting, etc.  MOST of this consumer
grade stuff has 8P8C modular jacks that are designed to accept UTP RJ-45
connectors made of plastic thus they do not provide any means for a
metal shielded connector (a la STP CAT 5/5e/6+ or all CAT 7 and above. 
IF you didn't do anything else, the STP cable and connectors would do
little to assist because they are NOT connected to the
chassis/supplemental shield and have no path to ground.

On a device with a plastic case providing no overall shielding and/or if
the radio shield or PS shield, or any other potential "trash" maker
(common OR differential) circuit is not properly designed and/or
shielded, and/or filtered, or other mitigating method, you're peeing
into the wind by simply adding shielded cables.  You can connect a drain
to ground from the cable/connector housing and that will help...  BUT
what you really have to do to clean up a non-FCC compliant device
putting out harmful/unwanted IF is to either/both/hybrid:

1) Construct an internal shield that will block the radiation from
leaving the enclosure AND connects to the signal cable shields and
thence to ground...  OR, if you can't do it internally,...
2) create and EXTERNAL shield with the same electrical characteristics.
3) Some hybridization of the 1 and 2.

Bottom line...  we said the exact same thing...

>> CAT 7(+) would make an excellent 4 circuit control wire for remotes and
>> the like since it has shield per pair...
>
> Those working in the world of pro audio deal every d

Re: [Elecraft] OT Cat 7 Ethernet Cable

[Jim Brown]

On Mon,3/7/2016 6:47 PM, Clay Autery wrote:

Any device putting out RFI as common mode are NOT in spec


Perhaps, but such devices are VERY common in the consumer world. I have 
no contact with the pro world of IT.



  Whether
they can be "fixed" or not has a lot to do with what "mistake" in design
caused the problem in the first place.  That has to be determined by
device.  Depending on the cause of the RF generation, there are a number
of ways to mitigate/eliminate the problem...  Shielded cable is only ONE
possible component in the overall solution.


Yep. Suitable common mode chokes can make a big dent in the RF trash 
radiated by the cable.



A non-inclusive list of causes:

Badly designed and/or shielded switch mode power supply (wall wart OR
internal).


The Ethernet birdies/carriers I listed are from the data stream, NOT 
from the PSU. Of course the PSU often generates trash, but it's 
DIFFERENT trash. :)



  A wall wart can radiate via the DC cord to the device and/or
send the signal into the device via the DC cable and then radiate via
the chassis or signal cables..  USUALLY internal PSs are adequately
shielded... but poor input filters or none at all can let the bad stuff
through.


Trash that radiates to our antennas is COMMON mode, not differential 
mode, and common mode is caused by improper return paths, and it cannot 
be "filtered." Filtering affects differential mode trash.



Wireless radios that are improperly designed or shielded can also be the
culprit.


I can't see any way that a 900 MHz or 1.8 GHz radio can cause RFI at HF. 
It is the baseband digital signals that have HF components.



Not having a separate logical and chassis ground can be a problem...


WRONG -- that is a CAUSE of problems, not a solution. See Henry Ott's 
classic text on EMC.



Shielded cables work best in my experience when you can create an
isolated chassis (or supplemental Faraday cage type superior to the
chassis (or internal to a plastic case) where the outer shield of the
cable and connector housing can be connected in one continuous shield
around the device(s) and the cable, etc, etc...


EXACTLY WRONG. For shielding to be effective, it must be continuous, 
including a termination to the shielding enclosure at both ends. Again, 
see Ott.

The benefit to CAT 7/7a would be the double shielding and the superior
connector termination and housings... make for easier continuous shield
external connections to drain/ground, et al.

Typically, it would be cheaper/more reliable to buy a properly designed
device in the first place...


Of course. :) IF you can identify one. But that requires a published, 
competent, technical review of products on the market that include RFI.  
Call me collect when you find such a thing. :)

CAT 7(+) would make an excellent 4 circuit control wire for remotes and
the like since it has shield per pair...


Those working in the world of pro audio deal every day with microphone 
signals in the range of -140 dBu, with required dynamic range of at 
least 110 dB, and typically have 24-32 mics active in a given recording 
or production. Any coherent noise that is present in multiple inputs 
will degrade s/n by 3 dB per doubling of the number of inputs, and 
modulation of an RF signal present on multiple inputs will be coherent 
after detection. My point is that pro audio faces a s/n problem FAR 
worse that we do in the radio or computer networking world. In that 
world, we have learned that TWISTING is at least as important as 
shielding, and often MORE important.


That said, serious contesters with extensive IT background have reported 
that STP does kill Ethernet birdies, and I believe them. I've never 
heard a suggestion that CAT7 was needed, nor have I ever read a spec for 
any of these cables.


73, Jim K9YC
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Re: [Elecraft] [KX3] tuning step - per mode

[Nr4c]

I believe most AM stations are on rather coarse spacing. 

Sent from my iPhone
...nr4c. bill


> On Mar 7, 2016, at 9:43 PM, herr42  wrote:
> 
> 
> 
> Ok I will rephrase.  Why is the min crs tuning step 1khz?  Other modes allow 
> .5 .1
> 
> 
> 
> Sent from my Verizon Wireless 4G LTE smartphone
> 
>  Original message 
> From: Jeff Herr  
> Date: 03/07/2016  4:58 PM  (GMT-08:00) 
> To: Elecraft@mailman.qth.net 
> Subject: [Elecraft] [KX3] tuning step - per mode 
> 
> why is the minimum tuning step in AM 1Khz ?
> 
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Re: [Elecraft] OT Cat 7 Ethernet Cable

[Clay Autery]

something is acting up on my end... my last response came through "blank".

Here's another try:
*
There is no unshielded CAT 7/7a...  at lower classes the
cable/connectors may be chosen as UTP or STP...  Cat 7 and above is
DOUBLE shielded.  Overall shield (braid) and shield per pair (aluminum
tape).

Any device putting out RFI as common mode are NOT in spec  Whether
they can be "fixed" or not has a lot to do with what "mistake" in design
caused the problem in the first place.  That has to be determined by
device.  Depending on the cause of the RF generation, there are a number
of ways to mitigate/eliminate the problem...  Shielded cable is only ONE
possible component in the overall solution.

A non-inclusive list of causes:

Badly designed and/or shielded switch mode power supply (wall wart OR
internal).  A wall wart can radiate via the DC cord to the device and/or
send the signal into the device via the DC cable and then radiate via
the chassis or signal cables..  USUALLY internal PSs are adequately
shielded... but poor input filters or none at all can let the bad stuff
through.

Wireless radios that are improperly designed or shielded can also be the
culprit.

Not having a separate logical and chassis ground can be a problem...

Crappy fans...  (best devices have properly designed passive cooling).

Lots of ways for a bad design to create noise.

Shielded cables work best in my experience when you can create an
isolated chassis (or supplemental Faraday cage type superior to the
chassis (or internal to a plastic case) where the outer shield of the
cable and connector housing can be connected in one continuous shield
around the device(s) and the cable, etc, etc...

The benefit to CAT 7/7a would be the double shielding and the superior
connector termination and housings... make for easier continuous shield
external connections to drain/ground, et al.

Typically, it would be cheaper/more reliable to buy a properly designed
device in the first place...

Note: there is a CAT 8 draft spec out now...

CAT 7(+) would make an excellent 4 circuit control wire for remotes and
the like since it has shield per pair...
CAT 7(a) cable, connectors, and tooling is insanely expensive by
comparison to 5/5e and even 6(+)

__
Clay Autery, KG5LKV
MONTAC Enterprises
(318) 518-1389

On 3/7/2016 4:48 PM, Jim Brown wrote:
> On Mon,3/7/2016 11:07 AM, Clay Autery wrote:
>> I'm not sure what the RFI issue would be that would require CAT 7...
>> Tell me what you're trying to fix and I can offer more info...
>
> There are well known issues with equipment using one of the wired
> Ethernet standard rates (have forgotten which one) generating carriers
> at several frequencies in the HF bands and on 6M. I'm primarily a CW
> guy, so the ones I run into are around 14030, 21052, the low end of
> 10M, the low end of 6M, and a couple of frequencies on 30M. These
> signals are radiated as a common mode signal, and I've been told that
> properly terminated shielded CAT5/6/7 eliminates it. Properly
> terminated means both in the cable-mounted plug and the
> equipment-mounted jack. I've also experienced broadband hash on 2M
> with a talkie within a foot or two of unshielded CAT5/6, including
> Belden's excellent Mediatwist cable.
>
> In addition to its use for wired Ethernet, unshielded CAT5/6/7 is
> quite useful in noise sensitive circuits because of its high twist
> ratio. As with Ethernet, twisted pairs reject noise and crosstalk ONLY
> when wired with one pair per circuit -- that is, or and or/blk as a
> circuit, bn and bn/blk as a circuit, and so on.
>
> 73, Jim K9YC

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Re: [Elecraft] [KX3] tuning step - per mode

[herr42]

Ok I will rephrase.  Why is the min crs tuning step 1khz?  Other modes allow .5 
.1



Sent from my Verizon Wireless 4G LTE smartphone

 Original message 
From: Jeff Herr  
Date: 03/07/2016  4:58 PM  (GMT-08:00) 
To: Elecraft@mailman.qth.net 
Subject: [Elecraft] [KX3] tuning step - per mode 

why is the minimum tuning step in AM 1Khz ?

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Re: [Elecraft] OT Cat 7 Ethernet Cable

[Clay Autery]

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Re: [Elecraft] Neoprene Ring for The Big Knob

[Steve Lund]

April 10th

On Mon, Mar 7, 2016 at 12:45 PM, Phil Wheeler  wrote:

> Reduced? !!  Sounds like an April Fool's joke :-)
>
> 73, Phil W7OX
>
>
> On 3/7/16 12:16 PM, Dwayne Rohmer wrote:
>
>> I have been told that USPS shipping rates will be reduced by 17%,
>> sometime in April. Not a huge drop, but it helps.
>>
>> 73,
>>
>> Dwayne WV5I
>>
>>
>> On 3/7/2016 12:29 PM, Dick Grolleman wrote:
>>
>>> Hi all,
>>>
>>> I would like the new ring, but not for $ 50.64 shipping. This is getting
>>> really ridiculous these shipping prices.
>>>
>>> 73 de Dick PA3FQA
>>>
>>
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Re: [Elecraft] Tactile Feedback

[Fred Jensen]

I didn't really mean tactile "feedback," my fingers just stick to the 
knob better.  "Small motor" capability declines with age, my CW RX speed 
has stayed constant over the years. but my sending ability has declined. 
 I just have less difficulty setting a specific frequency than with the 
original ring.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 3/7/2016 12:10 PM, Bill Frantz wrote:

I would like to feel some tactile feedback when using the RIT/XIT knob
to make gross changes in frequency. If there was a detent for each
change in frequency, then I would know how much to turn the knob without
having to look at the display.


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Re: [Elecraft] [KX3] tuning step - per mode

[GRANT YOUNGMAN]

You must be in “course” tuning mode.  Look at the instructions for “tuning 
rates” on page 11 of the manual.


Grant NQ5T
K3 #2091, KX3 #8342




> On Mar 7, 2016, at 6:58 PM, Jeff Herr  wrote:
> 
> why is the minimum tuning step in AM 1Khz ?
> 
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Re: [Elecraft] K3EXREF question

[Kevin Stover]

I believe that is the way it is.
53/1000 of a hertz over an hour?
I'd give that up all day everyday for the spectacular lack of phase 
noise in the K3s or K3 with the new synth.

It's not a cesium clock.

On 3/7/2016 8:02 AM, David Anderson wrote:

I -think- the way it works is that when the K3EXREF is locked with the external 
frequency standard on 10 MHz, this is used to measure the frequency of the 
TCXO. The value of that frequency measurement is then put into the K3 REFCAL 
setting. If the TCXO drifts slightly as they all will, then the frequency 
difference is detected and the value in REFCAL is changed to match, hence 
keeping the frequency of the K3 correct, without actually phase locking the 
TCXO to an external reference which could degrade the low phase noise 
performance of the K3's synth.

Basically the K3EXREF is doing the same thing automatically as you would 
manually when doing the calibration, by measuring the TCXO frequency and 
storing that value in REFCAL. The K3EXREF acting a frequency counter with a 
high stability external 10 MHz reference.

Hope I have that right.

So, it would be normal for the value in REFCAL to change as things warm up even 
with the external reference into the K3EXREF, because the TCXO is not locked, 
just measured.


73 from David GM4JJJ





--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441


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[Elecraft] [KX3] tuning step - per mode

[Jeff Herr]

why is the minimum tuning step in AM 1Khz ?

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Re: [Elecraft] USB Sound Card

[Kevin Stover]

Yes.
Also once any potential driver issue is rectified and the sound card is 
installed remember EXACTLY which USB port you plugged it into and use 
the same port always. Even though the driver is installed if you 
disconnect and reconnect to a different port Windows will see it as a 
new device and start the driver dance again.

Unless plug and pray has gotten a whole lot better (I doubt it).


On 3/7/2016 5:47 AM, Terry Posey wrote:

I use an Asus XONAR U7 with NAP3 and CW Skimmer on a Lenovo Windows 10.x machine , 
attached to the K3 IF via LP-PAN2.  Almost all USB sound cards are quirky to set-up with 
your particular computer and your particular audio applications.   As for the 
"stuck" 48k sample rate:  make sure the little switch under the XONAR U7 is in 
the USB Audio 2.0 position, then follow the guidance for loading the correct driver - do 
not let Windows load the default driver.

I hope this helps.

73,
Terry K4RX





--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441


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[Elecraft] SOLD: ELECRAFT K3s/0-MINI REMOTE CONTROL HEAD

[Robert S. McCuskey]

SOLD: ELECRAFT K3s/0-MINI REMOTE CONTROL HEAD (S/N 0335), thanks to all who
inquired.  73,  Bob  W7BV

 

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Re: [Elecraft] OT: Postal rates

[KQ8M]

Or hold them for the inevitable rate increases to come in the future.

73,
Tim Herrick, KQ8M
k...@kq8m.com

AR-Cluster V6 kq8m.homedns.org
User Ports: 23, 7373  with local skimmer, 7374 without local skimmer
Server Ports: V6 3607, V4 Active 3605, V4 Passive 3606


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don 
Wilhelm
Sent: Monday, March 07, 2016 4:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: Postal rates

I ship a lot of USPS Priority Mail too.

Yes, USPS Priority Mail rates did increase recently, but 1st class mail letter 
postage stayed the same.
I am seeing that the rate for 1st class mail was going to be reduced - I have 
no confirmation about Priority Mail, but I expect that
it stays the same as it is right now.

So use up all your "Forever" stamps that you paid $0.49 each when you bought 
them before the rate reduction goes into effect - they
will be worth only $0.47 after April 10.

73,
Don W3FPR

On 3/7/2016 4:14 PM, Rose wrote:
> I ship (worldwide) daily via USPS.  There was a recent rate -increase-.
>
>

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Re: [Elecraft] OT Cat 7 Ethernet Cable

[Jim Brown]

On Mon,3/7/2016 11:07 AM, Clay Autery wrote:

I'm not sure what the RFI issue would be that would require CAT 7...
Tell me what you're trying to fix and I can offer more info...


There are well known issues with equipment using one of the wired 
Ethernet standard rates (have forgotten which one) generating carriers 
at several frequencies in the HF bands and on 6M. I'm primarily a CW 
guy, so the ones I run into are around 14030, 21052, the low end of 10M, 
the low end of 6M, and a couple of frequencies on 30M. These signals are 
radiated as a common mode signal, and I've been told that properly 
terminated shielded CAT5/6/7 eliminates it. Properly terminated means 
both in the cable-mounted plug and the equipment-mounted jack. I've also 
experienced broadband hash on 2M with a talkie within a foot or two of 
unshielded CAT5/6, including Belden's excellent Mediatwist cable.


In addition to its use for wired Ethernet, unshielded CAT5/6/7 is quite 
useful in noise sensitive circuits because of its high twist ratio. As 
with Ethernet, twisted pairs reject noise and crosstalk ONLY when wired 
with one pair per circuit -- that is, or and or/blk as a circuit, bn and 
bn/blk as a circuit, and so on.


73, Jim K9YC
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Re: [Elecraft] K3/0 - How to enable left side mic?

[Joe]

Hello Jim,

My post was regarding the K3/0 and you have the Mini.  It looks like 
they are two different animals and the mike connection is different.


73, Joe, K1ike

On 3/7/2016 3:45 PM, elecraft-requ...@mailman.qth.net wrote:

To All,
I sent a support request to Elecraft regarding my issue and they replied
with the following:


 Start E-Mail Here ===
Hi Jim,

>From what you indicated, your Bias is turned ON for the MH2. If you are
using headsets which require Bias, this is important.

You can either use VOX or connect a footswitch to the back of the Mini
(PTT) to place the Mini in transmit. The XMIT/tune button can not be used
for PTT.

The microphone should have a mono 3.5 mm plug. That would go into the MIC
jack on the side of the Mini.

Let me know if this helps.

73,




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Re: [Elecraft] OT: Postal rates

[Hisashi T Fujinaka]

Hah. I'm sorry it's probably my fault - I just bought 100 forever stamps
last week.

On Mon, 7 Mar 2016, Don Wilhelm wrote:


I ship a lot of USPS Priority Mail too.

Yes, USPS Priority Mail rates did increase recently, but 1st class mail 
letter postage stayed the same.
I am seeing that the rate for 1st class mail was going to be reduced - I have 
no confirmation about Priority Mail, but I expect that it stays the same as 
it is right now.


So use up all your "Forever" stamps that you paid $0.49 each when you bought 
them before the rate reduction goes into effect - they will be worth only 
$0.47 after April 10.


73,
Don W3FPR

On 3/7/2016 4:14 PM, Rose wrote:

I ship (worldwide) daily via USPS.  There was a recent rate -increase-.




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--
Hisashi T Fujinaka - ht...@twofifty.com
BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee
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Re: [Elecraft] Dual Receive on a K3?

[Gary Smith]

> 73 Bill AE6JV, who finally gritted his teeth, got the 
> sub-receiver, and is very happy he did.

As am I with my sub Rx. Expensive? not compared to buying a 2nd radio 
and using my old Johnson tube based TR switch. I don't often use the 
Sub Rx & when I do, its usually for Diversity. Really slick 
integration.

73,

Gary
KA1J 
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Re: [Elecraft] Dual Receive on a K3?

[Bill Frantz]

On 3/7/16 at 1:19 PM, w...@pacbell.net (W6FG) wrote:


Would my only option be to add the sub-receiver or upgrade to the KX3?


As far as I know, the sub receiver is the only option. The KX3 
has dual watch, which does many of the same things, but has 
certain limitations. For example, the KX3 can not use narrow 
band filters with dual watch because it needs to have a wide 
enough bandwidth to tune both frequencies at the same time.


During the ARRL DX SSB contest, there were several stations that 
were listening in the US CW sub-band while transmitting in the 
SSB sub-band. KX3 dual watch is limited to 15KHz, which is not 
wide enough for this kind of operation. There were also DX 
stations doing the reverse.


73 Bill AE6JV, who finally gritted his teeth, got the 
sub-receiver, and is very happy he did.


---
Bill Frantz| Security is like Government  | Periwinkle
(408)356-8506  | services. The market doesn't | 16345 
Englewood Ave
www.pwpconsult.com | want to pay for them.| Los Gatos, 
CA 95032


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Re: [Elecraft] Dual Receive on a K3?

[Don Wilhelm]

Not possible without the sub-RX.

The KX3 does have 'dual watch' which will allow a small difference in 
frequency.  The KRX3 can even be on different bands if you set VFO IND on.


73,
Don W3FPR

On 3/7/2016 4:19 PM, W6FG wrote:

Hey All,

I'm just getting to know my K3 (w/o sub rx) again after being inactive for a
couple of years.  Can anyone tell me if there is a way to have dual receive
with my K3?

That is, I would like the ability to hear both the tx and the rx frequencies
at the same time.  I know that I can op split and just use the rev control,
but I'd like to hear both frequencies at the same time on CW.  It could even
be just using RIT/XIT rather than SPLIT, as long as I could be 2 or more KHz
off the rx frequency and hear both equally.




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Re: [Elecraft] OT: Postal rates

[Don Wilhelm]

I ship a lot of USPS Priority Mail too.

Yes, USPS Priority Mail rates did increase recently, but 1st class mail 
letter postage stayed the same.
I am seeing that the rate for 1st class mail was going to be reduced - I 
have no confirmation about Priority Mail, but I expect that it stays the 
same as it is right now.


So use up all your "Forever" stamps that you paid $0.49 each when you 
bought them before the rate reduction goes into effect - they will be 
worth only $0.47 after April 10.


73,
Don W3FPR

On 3/7/2016 4:14 PM, Rose wrote:

I ship (worldwide) daily via USPS.  There was a recent rate -increase-.




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Re: [Elecraft] OT: Postal rates

[Chortek Bob via Elecraft]

 blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px 
#715FFA solid !important;  padding-left:1ex !important; background-color:white 
!important; }  There will be a statutory reduction in first class rates.  It's 
already been announced.
Bob AA6VB


Sent from Yahoo Mail for iPhone


On Monday, March 7, 2016, 1:15 PM, Rose  wrote:

I ship (worldwide) daily via USPS.  There was a recent rate -increase-.

73

Rose - N7HKW
elecraftcov...@gmail.com
On Mar 7, 2016 1:47 PM, "Phil Wheeler"  wrote:

> Reduced? !!  Sounds like an April Fool's joke :-)
>
> 73, Phil W7OX
>
> On 3/7/16 12:16 PM, Dwayne Rohmer wrote:
>
>> I have been told that USPS shipping rates will be reduced by 17%,
>> sometime in April. Not a huge drop, but it helps.
>>
>> 73,
>>
>> Dwayne WV5I
>>
>>
>> On 3/7/2016 12:29 PM, Dick Grolleman wrote:
>>
>>> Hi all,
>>>
>>> I would like the new ring, but not for $ 50.64 shipping. This is getting
>>> really ridiculous these shipping prices.
>>>
>>> 73 de Dick PA3FQA
>>>
>>
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[Elecraft] Dual Receive on a K3?

[W6FG]

Hey All,

I'm just getting to know my K3 (w/o sub rx) again after being inactive for a
couple of years.  Can anyone tell me if there is a way to have dual receive
with my K3?  

That is, I would like the ability to hear both the tx and the rx frequencies
at the same time.  I know that I can op split and just use the rev control,
but I'd like to hear both frequencies at the same time on CW.  It could even
be just using RIT/XIT rather than SPLIT, as long as I could be 2 or more KHz
off the rx frequency and hear both equally.  

Would my only option be to add the sub-receiver or upgrade to the KX3? 

Tnx for any replies and, 

73
W6FG



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Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] OT: Postal rates

[Rose]

I ship (worldwide) daily via USPS.  There was a recent rate -increase-.

73

Rose - N7HKW
elecraftcov...@gmail.com
On Mar 7, 2016 1:47 PM, "Phil Wheeler"  wrote:

> Reduced? !!  Sounds like an April Fool's joke :-)
>
> 73, Phil W7OX
>
> On 3/7/16 12:16 PM, Dwayne Rohmer wrote:
>
>> I have been told that USPS shipping rates will be reduced by 17%,
>> sometime in April. Not a huge drop, but it helps.
>>
>> 73,
>>
>> Dwayne WV5I
>>
>>
>> On 3/7/2016 12:29 PM, Dick Grolleman wrote:
>>
>>> Hi all,
>>>
>>> I would like the new ring, but not for $ 50.64 shipping. This is getting
>>> really ridiculous these shipping prices.
>>>
>>> 73 de Dick PA3FQA
>>>
>>
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Re: [Elecraft] Neoprene Ring for The Big Knob

[Phil Wheeler]

Reduced? !!  Sounds like an April Fool's joke :-)

73, Phil W7OX

On 3/7/16 12:16 PM, Dwayne Rohmer wrote:
I have been told that USPS shipping rates will 
be reduced by 17%, sometime in April. Not a huge 
drop, but it helps.


73,

Dwayne WV5I


On 3/7/2016 12:29 PM, Dick Grolleman wrote:

Hi all,

I would like the new ring, but not for $ 50.64 
shipping. This is getting really ridiculous 
these shipping prices.


73 de Dick PA3FQA


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Re: [Elecraft] Neoprene Ring for The Big Knob

[Dwayne Rohmer]

I have been told that USPS shipping rates will be reduced by 17%, 
sometime in April. Not a huge drop, but it helps.


73,

Dwayne WV5I


On 3/7/2016 12:29 PM, Dick Grolleman wrote:

Hi all,

I would like the new ring, but not for $ 50.64 shipping. This is 
getting really ridiculous these shipping prices.


73 de Dick PA3FQA




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[Elecraft] Tactile Feedback

[Bill Frantz]

I would like to feel some tactile feedback when using the 
RIT/XIT knob to make gross changes in frequency. If there was a 
detent for each change in frequency, then I would know how much 
to turn the knob without having to look at the display.


The same feature would be nice on the other encoders -- 
Shift/width/speed/pwr and the two VFO knobs.


I don't know about the practicability of getting encoders with 
tactile feedback.


73 Bill AE6JV

in [Elecraft] Neoprene Ring for The Big Knob, On 3/7/16 at 10:19 
AM, k6...@foothill.net (Fred Jensen) wrote:


While I seem to be able to adapt to many things that bug 
others, and I had adapted to the original knob/ring, I really 
do like the feel of this one. There's a significant increase in 
the tactile sense on my fingers, and I seem to be able to set a 
frequency to 1 Hz more easily.  It's worth the $16 + USPS 
priority to me.


---
Bill Frantz| Since the IBM Selectric, keyboards have gotten
408-356-8506   | steadily worse. Now we have touchscreen keyboards.
www.pwpconsult.com | Can we make something even worse?

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[Elecraft] F/S: ELECRAFT K3s/0-MINI REMOTE CONTROL HEAD

[Robert S. McCuskey]

F/S: ELECRAFT K3s/0-MINI REMOTE CONTROL HEAD (S/N 0335), like new, purchased
in February for a remote operation that didn't materialize, only used for a
few test QSOs to successfully operate remote K3, KPA500, and KAT500 with the
K3s/0-mini control head through a laptop PC internet connection using Remote
Ham software and services (  www.remotehams.com),
can also use Remote Rig control and remote site units available from
Elecraft and others to provide internet connection without computer.  Sale
includes KUSB cable, power supply, and manual.  Pictures available on
listing on eHam.net. Cost new was $719, I'm asking $625  shipped, CONUS,
PayPal preferred or USPS Money Order.   Contact off list at: w7bv at comcast
dot net .   73, Bob W7BV

 

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Re: [Elecraft] Neoprene Ring for The Big Knob

[Clay Autery]

Sorry  forgot to include... this was a hypothetical package weighing
4 ounces (box).  You could get the weight down with a bubble envelope
and the part weight next to nothing...  But a box would be more sure to
get delivered intact.

__
Clay Autery, KG5LKV
MONTAC Enterprises
(318) 518-1389

On 3/7/2016 1:00 PM, Clay Autery wrote:
> Looks to me like you need to find a buddy in the States who'll get you
> one and post it to you...
>
> USPS First Class International is $13.50... Much more reasonable... and
> it has free delivery confirmation.
>
> __
> Clay Autery, KG5LKV
> MONTAC Enterprises
> (318) 518-1389
>
> On 3/7/2016 12:29 PM, Dick Grolleman wrote:
>> Hi all,
>>
>> I would like the new ring, but not for $ 50.64 shipping. This is
>> getting really ridiculous these shipping prices.
>>
>> 73 de Dick PA3FQA
>>

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Re: [Elecraft] OT Cat 7 Ethernet Cable

[Clay Autery]

What exactly are you trying to fix...  Class 7 has higher twist rate,
overall shielding and shielding per pair.  It is certified for use up to
600 MHz at up to 100 meter runs.  Terminated with 8P8C connectors.  CAT
7a is augmented 7 good up to 1GHz...  And there is a draft in the works
for CAT 8 (good to 1.6-2.0 GHz)  still with 8P8C connectors.

I'm not sure what the RFI issue would be that would require CAT 7... 
Tell me what you're trying to fix and I can offer more info...

__
Clay Autery, KG5LKV
MONTAC Enterprises
(318) 518-1389

On 3/7/2016 12:32 PM, David Ahrendts wrote:
> A quickie as I work through my RFI house cleaning. Anyone have experience in 
> using Cat 7 cable vs. Cat 6 in a home network? It’s my understanding Cat 7 is 
> extensively shielded while Cat 6 is not which ought to help that ethernet 
> “hash” issue.
>
> David A., KK6DA, LA 
>
>
>
> David Ahrendts   davidahren...@me.com   
>
>
>
>
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Re: [Elecraft] Neoprene Ring for The Big Knob

[Clay Autery]

Looks to me like you need to find a buddy in the States who'll get you
one and post it to you...

USPS First Class International is $13.50... Much more reasonable... and
it has free delivery confirmation.

__
Clay Autery, KG5LKV
MONTAC Enterprises
(318) 518-1389

On 3/7/2016 12:29 PM, Dick Grolleman wrote:
> Hi all,
>
> I would like the new ring, but not for $ 50.64 shipping. This is
> getting really ridiculous these shipping prices.
>
> 73 de Dick PA3FQA

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Re: [Elecraft] Neoprene Ring for The Big Knob

[Vic Rosenthal 4X6GP/K2VCO]

For something like that you should be able to choose "US Postal Service 
First Class" which should be just a few dollars.


73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/

On 7 Mar 2016 20:29, Dick Grolleman wrote:

Hi all,

I would like the new ring, but not for $ 50.64 shipping. This is getting
really ridiculous these shipping prices.

73 de Dick PA3FQA

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[Elecraft] OT Cat 7 Ethernet Cable

[David Ahrendts]

A quickie as I work through my RFI house cleaning. Anyone have experience in 
using Cat 7 cable vs. Cat 6 in a home network? It’s my understanding Cat 7 is 
extensively shielded while Cat 6 is not which ought to help that ethernet 
“hash” issue.

David A., KK6DA, LA 



David Ahrendts   davidahren...@me.com   




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Re: [Elecraft] Neoprene Ring for The Big Knob

[Dick Grolleman]

Hi all,

I would like the new ring, but not for $ 50.64 shipping. This is getting 
really ridiculous these shipping prices.


73 de Dick PA3FQA

-Oorspronkelijk bericht- 
From: Fred Jensen

Sent: Monday, March 07, 2016 7:19 PM
To: Elecraft Reflector
Subject: [Elecraft] Neoprene Ring for The Big Knob

Several asked how I liked it.  I finally consulted the manual, realized
how the knob went together, and put the new ring on.

While I seem to be able to adapt to many things that bug others, and I
had adapted to the original knob/ring, I really do like the feel of this
one. There's a significant increase in the tactile sense on my fingers,
and I seem to be able to set a frequency to 1 Hz more easily.  It's
worth the $16 + USPS priority to me.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
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[Elecraft] Neoprene Ring for The Big Knob

[Fred Jensen]

Several asked how I liked it.  I finally consulted the manual, realized 
how the knob went together, and put the new ring on.


While I seem to be able to adapt to many things that bug others, and I 
had adapted to the original knob/ring, I really do like the feel of this 
one. There's a significant increase in the tactile sense on my fingers, 
and I seem to be able to set a frequency to 1 Hz more easily.  It's 
worth the $16 + USPS priority to me.


73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org
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Re: [Elecraft] TX Inhibit

[Martin]

Sorry, i meant the TX sign on the right side of the display, between VFO 
A and B letters, not the TX Led.





Do you really mean that the red TX LED is flashing?



--

Ohne CW ist es nur CB..

73, Martin DM4iM
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Re: [Elecraft] P3 Vs. K3 Noise Level

[Alan]

The indicated noise level depends on the receive bandwidth.  For 
example, if you use a narrower bandwidth on the K3, you'll notice that 
the S meter reads lower.


The effective bandwidth of the P3 is approximately one pixel on the 
display, which is SPAN/468.  So, for example, if the span is 47 kHz, the 
effective bandwidth is about 100 Hz.  If the K3 bandwidth is 2.7 kHz, 
then the P3 should read 10 * log (2700/100) = 14 dB lower than the K3. 
14 dB is roughly 3 S-units.


When measuring a steady carrier, the K3 and P3 should read the same, 
since all of the signal is within the bandwidth.  The P3's amplitude can 
be calibrated with the "Lvl Cal" menu selection.


Alan N1AL


On 03/07/2016 03:14 AM, Brian J. Linn wrote:

All:



Even after considering the P3 manual (page 21) and with AGC off, I find the
following difference in S unit measurement odd.





Band  P3K3

75m   S5S9

10m   S0S2





I'm trying to ascertain an accurate noise level reading at my QTH.  Does
anyone have any thoughts on the degree of difference in these readings?



Brian KD0HII





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Re: [Elecraft] TX Inhibit

[Ian White]

>When TX INHIBIT is ON . the TX led is flashing all the time, even when
>TX is not inhibited. Is it only me or are others puzzled too?

Do you really mean that the red TX LED is flashing? 

According to the manual, it is normal for the "TX" symbol on the LCD
display to flash continuously if TX Inhibit has been selected.

But WHY? The continuous flashing serves no particular purpose - but much
worse, it hides the important warning that Test Mode may have been
activated inadvertently (and who hasn't done that?) 

Please can Elecraft remove that feature.


73 from Ian GM3SEK


>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>Martin
>Sent: 07 March 2016 13:59
>To: elecraft
>Subject: [Elecraft] TX Inhibit
>
>Elecrafters,
>this has been discussed a long time ago, is there any news about this:
>
>When in TEST MODE the TX led is flashing to inform you the tx can not
be
>engaged.
>
>When TX INHIBIT is ON . the TX led is flashing all the time, even when
>TX is not inhibited. Is it only me or are others puzzled too?
>
>
>--
>
>Ohne CW ist es nur CB..
>
>73, Martin DM4iM
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Re: [Elecraft] K3/0 - How to enable left side mic?

[jlbates4]

To All,
I sent a support request to Elecraft regarding my issue and they replied
with the following:


 Start E-Mail Here ===
Hi Jim,

>From what you indicated, your Bias is turned ON for the MH2. If you are
using headsets which require Bias, this is important.

You can either use VOX or connect a footswitch to the back of the Mini
(PTT) to place the Mini in transmit. The XMIT/tune button can not be used
for PTT.

The microphone should have a mono 3.5 mm plug. That would go into the MIC
jack on the side of the Mini.

Let me know if this helps.

73,

-- 
--
Craig Smith W6WL
Elecraft Customer Support
831-763-4211 x 174
--
 End E-Mail Here ===


I wired up a PTT using the K3/0-Mini "PTT" jack on the rear; plugged my
headset/mic into the left MIC/SPKR jacks and it WORKED...

Apparently, you MUST use the hardline PTT for the K3/0-Mini to accept MIC
input from the left side jacks.  Pressing the XMIT button and using CAT
control did NOT enable the headset mic to work...

The question remains - why would the design require a dedicated PTT for
headset use?  I thought plugging the headset into the left MIC jack
"disabled" the front panel MIC (8 pin) jack...

Anyway, I did want to share with the the group.

73 de K8OI

---
Jim Bates
mailto:jlbat...@gmail.com
(804) 592-1068

On Sun, Feb 28, 2016 at 1:24 PM, JOE-2 [via Elecraft] <
ml-node+s365791n7614736...@n2.nabble.com> wrote:

> The manual for the K3/0 says:
> "It uses its internal speaker and front headphone jack for receive
> audio, and its front
> microphone connector for your mic input."
>
> In other words you need to use the front mike connector on the K3/0.
> The mike connector on the back of the K3/0 is actually an output to the
> RemoteRig box.  This is different than the back of your K3/10 K3/100
> radio, where it is an input.  You need the special E85051 (or homemade
> equivalent) cable that connects the K3/0 "SPKRS" and "PTT IN" to the
> RRC1258 "AUX/MIC" jack. BTW, the "PTT IN" on the K3/0 is actually a PTT
> output from the K3/0 to the RRC1258.
>
> You may be able to make a direct connection to the RRC1258 "AUX/MIC" for
> your headset.  I've never done this, but it may be possible.
>
> The HM2 mike is an Electret that needs bias on.  Both Heils are probably
> Dynamic and need bias off.  You'll have to check the Heil literature. I
> don't know how bias is controlled in the K3/0 so I don't know how bias
> on/off woks at the K3/0 but it's worth mentioning as a possible problem.
>
> If you are using the E850511 that came from Elecraft, there is a
> possibility of a "digital noise" problem.  The pairs used for mike audio
> are split between two pairs, causing an imbalance.  This may or may not
> show up in your K3/0.
>
> There is also a small noise problem in the E980207 speaker cable that
> goes between the K3/0 and the RRC1258.  I fixed that with isolation
> transformers.
>
> 73, Joe, K1ike
>
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> To unsubscribe from K3/0 - How to enable left side mic?, click here
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> NAML
> 
>




-
K8OI
mailto:jlbat...@gmail.com
(804) 592-1068
--
View this message in context: 
http://elecraft.365791.n2.nabble.com/K3-0-How-to-enable-left-side-mic-tp7614691p7614982.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] K3EXREF question

[David Anderson]

I -think- the way it works is that when the K3EXREF is locked with the external 
frequency standard on 10 MHz, this is used to measure the frequency of the 
TCXO. The value of that frequency measurement is then put into the K3 REFCAL 
setting. If the TCXO drifts slightly as they all will, then the frequency 
difference is detected and the value in REFCAL is changed to match, hence 
keeping the frequency of the K3 correct, without actually phase locking the 
TCXO to an external reference which could degrade the low phase noise 
performance of the K3's synth.

Basically the K3EXREF is doing the same thing automatically as you would 
manually when doing the calibration, by measuring the TCXO frequency and 
storing that value in REFCAL. The K3EXREF acting a frequency counter with a 
high stability external 10 MHz reference.

Hope I have that right.

So, it would be normal for the value in REFCAL to change as things warm up even 
with the external reference into the K3EXREF, because the TCXO is not locked, 
just measured.


73 from David GM4JJJ

> On 7 Mar 2016, at 11:01, David Pratt  wrote:
> 
> Andy - Without the K3EXREF connected, the REF CAL frequency will be
> fixed and the K3 will drift, albeit very slightly, particularly when it
> is first switched on.  With K3EXREF locked with your 10MHz standard the
> REF CAL frequency will vary to correct any drift in the K3. If you
> measure the output frequency of your K3 with an accurate frequency
> meter, such as a digital counter locked to a standard, you will find
> that your K3 is stable to within +/- a couple of Hertz.
> 
> 73 de David G4DMP
> 
> In a recent message, ANDY NEHAN  writes
>> Sometime ago I installed the K3EXREF which I feed from an external
>> 10MHz double oven Xtal oscillator. I am confident the K3EXREF is
>> installed and configured correctly as when in use and the external
>> oscillator is connected the front panel says REF*CAL with the *
>> blinking. Attempting to change the local oscillator frequency gives the
>> message "Locked" just as the manual says.
>> However, I am puzzled as the local oscillator frequency display slowly
>> drifts down from 49.379.675Hz to 49.379.622Hz over a period of at least
>> an hour from K3 switch on.  I leave the external oscillator on
>> permanently. I was expecting the local oscillator to rapidly get to its
>> final frequency. Can someone explain whats happening as I am puzzled??
>> My firmware is the latest version.
>> Andy G4HUE
> -- 
> + - - - - - - - - - - - - - - - - +
> | David M Pratt, Kippax, Leeds.   |
> | Website: http://www.g4dmp.co.uk |
> + - - - - - - - - - - - - - - - - +
> 
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[Elecraft] TX Inhibit

[Martin]

Elecrafters,
this has been discussed a long time ago, is there any news about this:

When in TEST MODE the TX led is flashing to inform you the tx can not be 
engaged.


When TX INHIBIT is ON . the TX led is flashing all the time, even when 
TX is not inhibited. Is it only me or are others puzzled too?



--

Ohne CW ist es nur CB..

73, Martin DM4iM
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[Elecraft] FS 13k, 1.8 filters

[brian]

Perfect working condition. 1 year old
Contact off list.
73 de Brian/K3KO
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Re: [Elecraft] USB Sound Card

[Terry Posey]

I use an Asus XONAR U7 with NAP3 and CW Skimmer on a Lenovo Windows 10.x 
machine , attached to the K3 IF via LP-PAN2.  Almost all USB sound cards are 
quirky to set-up with your particular computer and your particular audio 
applications.   As for the "stuck" 48k sample rate:  make sure the little 
switch under the XONAR U7 is in the USB Audio 2.0 position, then follow the 
guidance for loading the correct driver - do not let Windows load the default 
driver.

I hope this helps.

73,
Terry K4RX


Tom,

If the problem is only happening when the Asus U7 is the default soundcard, 
then how do you deal with the tendency of the Windows operating system to set 
any newly installed soundcard as the default?  
Seems like a "catch 22" to me.
Yes, the specs on the Asus U7 are very good, but for panadapter use, it needs 
the 192 kHz bandwidth.

73,
Don W3FPR

On 3/6/2016 7:05 PM, tomb18 wrote:
> That's strange. Never heard a single issue with the Asus u7 stuck at
> 48 and i know of many many people using them. The only reason that 
> happens is that people often set the card as the default sound card 
> which should not be done.
> The u7 in my experience, is the quietest and least likely to have Spurs.
> Cards to stay away from now a days with win10 are the emu cards. 
> Upgrades to win10 may work but not fresh installs. Drivers are at 
> least 4 years old and still beta.
> Tom
> va2fsq.com
>

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[Elecraft] KAT500 Problem Status

[Ed G]

Thanks to Dick K6KR for helping me with this problem yesterday. Updating the
KAT500 utility program, in combination with a KAT500 firmware reload, fixed
the issue. 
--Ed--



Message: 7
Date: Sun, 6 Mar 2016 08:08:11 -0500
From: "Ed G" 
To: 
Subject: [Elecraft] KAT500 Utility Question
Message-ID: 
Content-Type: text/plain;   charset="us-ascii"

Hello,
 I am trying to understand the operation of the KAT500 utility.  Not
sure if my problem is pilot error or maybe a problem within the tuner
itself.  I have the latest firmware installed.
 I am unable to manually select the antenna using the utility. I cannot
physically check the tuner as it is in a remote location. Each time I select
an antenna other than ANT1 using the radio buttons, the selection reverts
back to ANT1. This happens whether in Bypass, Manual, or Auto modes.  I have
verified the antenna setup per band. In my case I want to use ANT2 for 80
meters, and have set this up in the antenna tab. I have even disabled ANT1
for 80 meters, but the utility still won't let me select ANT2 for 80 meters.
The KAT500 also does not automatically switch when RF is applied, even
though the utility will read the correct 3.5 MHz frequency.
 Any ides for what to check?
--Ed--






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[Elecraft] P3 Vs. K3 Noise Level

[Brian J. Linn]

All:

 

Even after considering the P3 manual (page 21) and with AGC off, I find the
following difference in S unit measurement odd.

 

 

Band  P3K3

75m   S5S9

10m   S0S2

 

 

I'm trying to ascertain an accurate noise level reading at my QTH.  Does
anyone have any thoughts on the degree of difference in these readings?

 

Brian KD0HII

 

 

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Re: [Elecraft] K3EXREF question

[David Pratt]

Andy - Without the K3EXREF connected, the REF CAL frequency will be
fixed and the K3 will drift, albeit very slightly, particularly when it
is first switched on.  With K3EXREF locked with your 10MHz standard the
REF CAL frequency will vary to correct any drift in the K3. If you
measure the output frequency of your K3 with an accurate frequency
meter, such as a digital counter locked to a standard, you will find
that your K3 is stable to within +/- a couple of Hertz.

73 de David G4DMP

In a recent message, ANDY NEHAN  writes
>Sometime ago I installed the K3EXREF which I feed from an external
>10MHz double oven Xtal oscillator. I am confident the K3EXREF is
>installed and configured correctly as when in use and the external
>oscillator is connected the front panel says REF*CAL with the *
>blinking. Attempting to change the local oscillator frequency gives the
>message "Locked" just as the manual says.
>However, I am puzzled as the local oscillator frequency display slowly
>drifts down from 49.379.675Hz to 49.379.622Hz over a period of at least
>an hour from K3 switch on.  I leave the external oscillator on
>permanently. I was expecting the local oscillator to rapidly get to its
>final frequency. Can someone explain whats happening as I am puzzled??
>My firmware is the latest version.
>Andy G4HUE
-- 
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +

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Re: [Elecraft] K3EXREF question

[Roger]

Hi Andy,
I have the same (hardware) constellation and get similar results.



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[Elecraft] K3EXREF question

[ANDY NEHAN]

Sometime ago I installed the K3EXREF which I feed from an external 10MHz double 
oven Xtal oscillator. I am confident the K3EXREF is installed and configured 
correctly as when in use and the external oscillator is connected the front 
panel says REF*CAL with the * blinking. Attempting to change the local 
oscillator frequency gives the message "Locked" just as the manual says.
However, I am puzzled as the local oscillator frequency display slowly drifts 
down from 49.379.675Hz to 49.379.622Hz over a period of at least an hour from 
K3 switch on.  I leave the external oscillator on permanently. I was expecting 
the local oscillator to rapidly get to its final frequency. Can someone explain 
whats happening as I am puzzled??
My firmware is the latest version.
Andy G4HUE
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[Elecraft] K3EXREF question

[ANDY NEHAN]

Sometime ago I installed the K3EXREF which I feed from an external 10MHz double 
oven Xtal oscillator. I am confident the K3EXREF is installed and configured 
correctly as when in use and the external oscillator is connected the front 
panel says REF*CAL with the * blinking. Attempting to change the local 
oscillator frequency gives the message "Locked" just as the manual says.
However, I am puzzled as the local oscillator frequency display slowly drifts 
down from 49.379.675Hz to 49.379.622Hz over a period of at least an hour from 
K3 switch on.  I leave the external oscillator on permanently. I was expecting 
the local oscillator to rapidly get to its final frequency. Can someone explain 
whats happening as I am puzzled??
My firmware is the latest version.
Andy G4HUE
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[Elecraft] DSP's

[Frank Weiner]

I have an Elecraft K3.
I already have some filters including Noise Reduction which works well.
Would an external Digital Signal Processor improve the quality of my
reception?
In particular I am looking at the West Mountain Clear Speech noise
suppressor.
AD0MX
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