[Elecraft] K4 CW and keying Rise Time

[Dan Atchison via Elecraft]

I am hoping that the K4, like its predecessor the K3(S), does _NOT_ give 
a user the ability to change its CW rise times.


I believe the K3 is designed for a 5ms rise.  Many, if not most, other 
manufacturers allow as little as 1ms resulting in CW signals that reach 
beyond 1kHz of bandwidth by creating horrible key-clicks.  Indeed, their 
"default" values can be too short. To what end?  Unscrupulous users 
setting it so their clicks help keep their run frequency clear?  
Terrible to think that but I have heard some station owners admitting same.


Last weekend's CWSS had many, many horrible key-click stations - some 
from notable contesters.  I realize that things other than a CW rise 
time can give cause to key-clicks (antenna connections, hot-switching, 
etc.), but newer radios shouldn't be the culprit - yet they can be 
because of manufacturer's oversight (or under-thought).


I've never heard of a short CW rise time being an advantage other than 
to create havoc. There is a happy medium.


Dan - N3ND


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Re: [Elecraft] [Elecraft-K3] K3S to be discontinued

[Dan Atchison via Elecraft]

Yea!?? I've been waiting for this announcement!?? Way to go Elecraft!

On 11/4/2019 11:13 AM, Grant Youngman wrote:

Well, that???s very good news.  Unless I???ve missed it, this is first note 
I've seen that confirms predistortion corrections in the K4.

Grant NQ5T


On Nov 4, 2019, at 10:58 AM, Wayne Burdick  wrote:

This is why the K4 (and a small number of other transceivers) include "active 
predistortion" capability in hardware. It adapts the drive power to the response 
curve of the PA stage. The K4 also has an TX sample input to include an external 
amplifier in the correction loop. (The KPA1500 has a TX sample output for this purpose.)

We expect to post numbers significantly better than the industry's typical 
3rd-order intermod performance at 100 W, which stands at about -30 dBc (ARRL 
method).

73,
Wayne
N6KR



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Re: [Elecraft] K4 at Field Day

[Dan Atchison via Elecraft]

Will this be a D model to try out multi-multi environments or will it have the 
superheterodyne option?
73,Dan

Sent from AOL Mobile Mail
Get the new AOL app: mail.mobile.aol.com
 On Friday, June 21, 2019, Wayne Burdick  wrote:

We'll have one K4 at the Bay-Net Field Day site near San Jose this year. On 
Saturday we'll be using the club call, K6SRA. On Sunday I'll be operating from 
another location to be determined using my own call. 

This is largely an experimental first FD effort for the K4, running early 
software, etc. I'll be bringing a KX2 Li-Ion battery pack to see how long it 
can power the K4 during hunt-and-pounce Field Day operation at 5 W :)

73,
Wayne
N6KR

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Re: [Elecraft] KPA1500 Power Supply Fan Noise

[Dan Atchison via Elecraft]

My KPA1500 s/n 156 had such a problem with PS audible noise.?? It was 
fixed with two mods available from Elecraft, one a new LED board and 
another with a resistor addition to the MeanWell power supply output?? 
The latter was probably not associated with noise but it's an addition 
that was not on my #156.


73,
Dan -- N3ND

On 6/11/2019 7:51 AM, Roy Koeppe wrote:
Eric -- this is not at all normal! My PSU is quiet...hardly hear it 
from under the table. I understand Elecraft changed to much quieter 
fans maybe two years ago. But even so, perhaps the voltage to your 
fans has soared way to high? I haven't looked at the circuit driving 
them. Maybe lost regulation, etc.


73, Roy?? K6XK


Apparently I was not clear enough in my message.?? It is the PSU fan noise
that is deafening, not the RF deck.?? Like Peter, my PSU sits on the floor
underneath a wooden operating desk that holds the rest of the K-line.?? 
The

noise from the PSU is high-pitched and piercing.?? The only thing I can
liken it to is a four-rotor Mazda prototype IMSA GTP race car from the
early 90s.?? Brain-piercing, tear-your-hair-out, heard-from-every
room-in-the-house louder than hell, and has been so since the day it
darkened my doorway--with the RF deck at idle.

73 Eric WD6DBM



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[Elecraft] KPA1500 fans

[Dan Atchison via Elecraft]

I have all of the KPA1500 fan mods and firmware upgrades and they make 
the amplifier so much quieter.?? Good job, Elecraft.


What I would like to see, however, is a firmware /option /to exhibit the 
following tendency.


Minimum fan speed at 0.?? When the amp detects a PTT, then the fan speed 
would increase to fan level 1 and remain that way for a period of time 
after PTT detection has ceased (perhaps 10 - 15 seconds?). After that 
delay time it would go back to fan speed 0.?? Of course, temperature 
sensing would increase fan speed regardless of the PTT sense.


If this has been discussed before, I missed it.?? If it's currently 
available then I missed it again.


Awaiting my K4.?? I hate waiting!

73,
Dan -- N3ND

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[Elecraft] K4 - Can I assume? (KHDR4)

[Dan Atchison via Elecraft]

Noting that the KHDR4 superhet option has crystal filters for SSB and CW 
(and I've seen a potential change of thought to provide a third XTAL 
filter), is a K4HD still capable of wide-band reception, i.e. FM or 
other modes? IOW, can I assume WB reception can be done in a K4HD 
without a hardware change?


BTW, it appears the LINE OUT is a stereo connection - both channels.?? 
That is neat!


73,
Dan -- N3ND


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Re: [Elecraft] K4

[Dan Atchison via Elecraft]

I am certainly aware of this, Don, but that is not what I am seeking.?? I 
wish to have tuning rates selectable by mode, i.e. 2 kHz tuning rate for 
CW and 4 kHz for SSB without making other changes than a mode change. 
This was discussed years ago and I thought a commitment was made, but I 
have never seen the option.?? Of course, I may be incorrect.


73,
Dan


On 5/6/2019 10:34 AM, Don Wilhelm wrote:

Dan,

The K3 and K3S already have the separate tuning rates (sort of) - but 
only when set to COURSE.?? See the VFO CRS menu description.
The other neat feature (which I use all the time) is to set VFO OFS to 
ON which allows the VFO B knob to move VFO A in large steps (according 
to VFO CRS) except when either RIT or XIT are on.


I use those for quick QSY in the bands.
Try it, you may like it.

73,
Don W3FPR

On 5/6/2019 10:01 AM, Dan Atchison via Elecraft wrote:

Notch filter inside the IF
Separate tuning rates for CW and SSB

73,
Dan -- N3ND


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[Elecraft] K4

[Dan Atchison via Elecraft]

Notch filter inside the IF
Separate tuning rates for CW and SSB

73,
Dan -- N3ND
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[Elecraft] My weigh-in, K4

[Dan Atchison via Elecraft]

I have to agree with the posts noting with disappointment that Elecraft 
has not, nor seems to show little interest, in producing a new 
competitive desktop radio.  That said, I'm sure they are working on one, 
but when produced, the market may be saturated with other manufacturers 
radios who have felt the need to get to market quickly.


It doesn't matter that the K3(S) is a truly fine and competitive radio.  
It isn't a matter that the performance ratings of the newer radios are 
significantly better (they are not).  It comes down to we who love 
technology and wish to be on the cutting edge; to have a unit with the 
latest bells and whistles.  The K3(S) for the most part, is technology 
over a dozen years old.  To wit, I have grown tired of looking at the 
same radio for over 10 years, from my early S/N K3 to a second and newer 
radio, a K3S.  Ho, hum.


At the price of newer, competitive radios, trading newer for older or 
one radio for another becomes less attractive.  I have already seen in 
abundance those who have already discarded the K3(S) in favor of Icom's 
or Flex's newer offerings, not only contesters but DXers as well. I have 
not yet, but may soon.  Should Elecraft come out with a K4 or whatever, 
regardless of it's feature set, they've already lost advantage and way 
behind the market.  Of course, we who drink the Elecraft cool-aid will 
no doubt purchase.


To those that say "moving on" is unnecessary, I ask how old their 
vehicles are?  I buy a new vehicle, not often, but every 5 to 7 years 
not because the older car doesn't get me from point A to point B in fine 
fashion, but because I just want something more recent with newer or 
upgraded options.  How about your cellphone? How many are using one 10 
years old?  It's personal preference just like it is for radios.


73,
Dan

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[Elecraft] K3 / RF gain - S meter issue - Similar issue

[Dan Atchison via Elecraft]

More info.

Thanks to Brian, K3KO, some hints were given to check my particular 
issue.  Thanks also to Bob, K4TAX.


Since I have no intention of opening my radio (as the radio does work 
fine), I have discovered something of interest and a potential cause for 
the symptom I'm seeing.


As I apply a high signal level into the radio, I reach a point where the 
S-Meter behaves exactly like rotating the RF Gain control 
counter-clockwise (the reading drops).  This is easily duplicated.


Brian noted that perhaps what I am seeing is being caused by the K3 
Automatic Front-End Protection modification which my radio had its 
modification years ago.  The mod protection works as designed while 
injecting a high signal level into the K3, and I do see where the preamp 
(if engaged) is disabled.  Furthermore, I see HI SIG displayed in the K3 
VFO-B area.


Interestingly, my symptom happens at the same "signal level" the S-Meter 
reacts to with preamp disengagement, but without an injected signal just 
by rotating counter-clockwise the RF Gain control.  I do not, however, 
see the HI SIG level notification during this test and it matters not if 
the preamp is engaged or disengaged.  That said, the resultant S-Meter 
reading that had been "dropped" does follow both attenuation and preamp 
values.


Brian might be on to something!

Again, no intention of pursuing further unless Elecraft can duplicate 
and create a mod.


73 and thanks for the BW,
Dan



*


 [Elecraft] K3 / RF gain - S meter issue - Similar issue

*Bob McGraw K4TAX* rmcgraw at blomand.net 
<mailto:elecraft%40mailman.qth.net?Subject=Re%3A%20%5BElecraft%5D%20K3%20/%20RF%20gain%20-%20S%20meter%20issue%20-%20Similar%20issue=%3Cf76213ce-61de-69fb-f4c5-3b0dc10f7db8%40blomand.net%3E>




My concern would be "does the S meter indicate correctly?"

Thus with 50 uV applied to the antenna input it should read S-9, and
with 0.78 uV applied it should read S-3, and with 5000 uV applied it
should read S-9 +40 dB.    I've checked my K3S at these and other values
and I'm confident that the S meter is accurate. Hence, I'm confident I
can give accurate signal reports.  Thus unlike many radios and their S
meters, they are only good for a rather unscientific and largely
inaccurate signal report, somewhat like a SWAG.

73

Bob, K4TAX


On 12/14/2017 10:16 AM, Dan Atchison via Elecraft wrote:
/I have a similar - but different! - issue on one of my Elecraft's. />//>/I own both a K3 and a K3s.  Both are configured equally with the K3 />/having been upgraded to the highest level to achieve near K3s />/equivalency. />//>/My K3s RF Gain control works exactly as expected, i.e. as the control />/is rotated counter-clockwise the "S-Meter" increases to a point at />/almost full scale. />//>/On the K3, however, as the RF Gain control is rotated />/counter-clockwise and the "S-Meter" increases to about the "40-over" />/point at the control's 10 o'clock position the "S-Meter" then />/inexplicably drops to the "S9" position where it remains for the />/remainder of the RF gain control counter-clockwise rotation. This />/shouldn't be but like N1LN's issue, the radio does otherwise perform />/correctly.  I have done everything that N1LN has done including the RF />/Gain calibration using a signal generator. />//>/Very strange, indeed. />//>/Dan -- N3ND />//>/* />//>/Date: Wed, 13 Dec 2017 16:25:20 -0500 />/From: "Bruce Meier"<http://mailman.qth.net/mailman/listinfo/elecraft>> />/To:<http://mailman.qth.net/mailman/listinfo/elecraft>> />/Subject: [Elecraft] K3 / RF gain - S meter issue />//>//>/Looking for suggestions here from someone that might have experienced />/this />/same issue - - />//>//>//>/I have (2) K3 units (not the S model) that are acting different when />/the RF />/gain adjustments are turned fully counter clockwise. />//>/?  Unit one ? s/n 1062: When the RF gain is decreased to full counter />/clockwise position the S-Meter registers full scale (60db over S9) as />/expected. />//>/?  Unit two ? s/n 1193:  When the RF gain is decreased to full counter />/clockwise position the S-Meter registers only S8. />//>/  Facts: />//>/?  With the exception of the S-Meter readings with RF gain settings, both />/units are working fine />//>/?  Both units have ?almost? all mods installed.  If not all, they are at />/least both the same. />//>/?  Both units are running the same version of microcode (5.54) (2.88) />/(2.88) />/(1.26) />//>/?  Both units seem to register very close actual RF gain of stations when />/connected when tested on the same antenna /&

Re: [Elecraft] K3 / RF gain - S meter issue - Similar issue

[Dan Atchison via Elecraft]

I have a similar - but different! - issue on one of my Elecraft's.

I own both a K3 and a K3s.  Both are configured equally with the K3 
having been upgraded to the highest level to achieve near K3s equivalency.


My K3s RF Gain control works exactly as expected, i.e. as the control is 
rotated counter-clockwise the "S-Meter" increases to a point at almost 
full scale.


On the K3, however, as the RF Gain control is rotated counter-clockwise 
and the "S-Meter" increases to about the "40-over" point at the 
control's 10 o'clock position the "S-Meter" then inexplicably drops to 
the "S9" position where it remains for the remainder of the RF gain 
control counter-clockwise rotation.  This shouldn't be but like N1LN's 
issue, the radio does otherwise perform correctly.  I have done 
everything that N1LN has done including the RF Gain calibration using a 
signal generator.


Very strange, indeed.

Dan -- N3ND

*

Date: Wed, 13 Dec 2017 16:25:20 -0500
From: "Bruce Meier"
To:
Subject: [Elecraft] K3 / RF gain - S meter issue


Looking for suggestions here from someone that might have experienced this
same issue - -

 


I have (2) K3 units (not the S model) that are acting different when the RF
gain adjustments are turned fully counter clockwise.

?  Unit one ? s/n 1062: When the RF gain is decreased to full counter
clockwise position the S-Meter registers full scale (60db over S9) as
expected.

?  Unit two ? s/n 1193:  When the RF gain is decreased to full counter
clockwise position the S-Meter registers only S8.

 Facts:

?  With the exception of the S-Meter readings with RF gain settings, both
units are working fine

?  Both units have ?almost? all mods installed.  If not all, they are at
least both the same.

?  Both units are running the same version of microcode (5.54) (2.88) (2.88)
(1.26)

?  Both units seem to register very close actual RF gain of stations when
connected when tested on the same antenna

?  Both units have the new synthesizers.

?  Both units have second RX

?  In both cases (both units) I can hear the audio level decreasing linearly
as expected as the RF gain is turned counter clockwise

I have tried to initialize the K3 and reload the firmware resulting in no
change to the RF gain / S-Meter readings.

 


Elecraft Tech Support suggested:

?  Calibrating the s-meter ? did nothing

?  Next suggestion ? send the rig to California.

 


Anyone have this issue and fixed it??

 


73,

Bruce N1LN

 


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[Elecraft] N1MM+ & K3/K3s & Diversity

[Dan Atchison via Elecraft]

I am willing to bet that while trying to hit the ESC key in N1MM+, you 
accidentally or also hit the ~ key immediately below the escape key.  
That will cause the symptom you described.


73,
Dan

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[Elecraft] Win4K3 and Elad S2

[Dan Atchison via Elecraft]

Has anyone successfully installed Win4K3 + an Elad FDM-S2 for spectrum 
control?


73,
Dan

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Re: [Elecraft] OT Yamaha CM-500 ear pads

[Dan Atchison via Elecraft]

Not a replacement ear pad, but if you get a new headset, you might want 
to cover them with a "Garfield Headphone Softie."  These covers protect 
the original ear pad and, IMHO, make the headphones more comfortable on 
the ear.  I use them on my CM500 headset and my Sony MDR-7506 headphones.


https://www.bhphotovideo.com/c/product/368310-REG/Garfield_SGARHS1_Headphone_Softie_Earpad.html

73,
Dan


**

*George Winship, NC5G* gwwa5uih at hotmail.com 


/Sun Jul 30 23:18:06 EDT 2017/


Has anyone found a suitable replacement ear pad. Mine are worn out. Otherwise
the headset is good and hate to discard it. Did not find anything in the
archives.

73, George NC5G

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[Elecraft] TX Test Mode garbage

[Dan Atchison via Elecraft]

I have observed this since receiving my K3s shortly after its 
introduction.   Even though I was told on the telephone that it was not 
possible, I sent in the K3s to have it analyzed and to have another PA 
issue resolved.  I later received an email confirming the issue stating 
that there is some leakage and that it was on their list for a fix.  
That was two years ago.


Yes, the K3s does put out power during this clicking and it has been 
observed by operators who live close by.  Power and SWR are noted on a 
digital power meter.


73,
Dan



I received an email from a German ham telling me that he's observing the same
thing that I reported a couple of years ago. Specifically an audible "clicking"
sound in both my K3S and KPA500 that coincides with CW keying.  See this thread:
http://elecraft.365791.n2.nabble.com/KPA500-clicking-td7596512.html

Since there was no "fix" from Elecraft I guess time dulled my sensitivity to it
until I received the email and then I thought to listen for it again.  It's
thunderstorm season here in the AZ desert so my antenna cables are all
disconnected. Because the problem manifests whether or not RF is being generated
I put the K3S into TX Test mode and put the KPA500 into operate.  As before, the
clicking is still there in both the K3S and KPA500.

But while doing this I noted that the SWR LEDs on the KAT500 were flashing.
Since the antennas are disconnected this would be normal if RF was being
generated, however as stated, I'm in Test mode.  One of my tuner ports has a
dummy load attached so I switched to it and lo and behold the amp output LED was
showing ~50W.

I have an original K3 so I tuned it to the K3S frequency, keyed the K3S and
listened on the K3.  I could hear a non-coherent, clicky "garbage" signal that
seemed to have a spectrum roughly the width of the TX filter.  Because both
radios were running on the same power supply to eliminate the possibility of
crosstalk via that path I fired up an SDR-IQ running on a totally separate
computer and looked at the spectrum.  Although it's non-synchronous to the
keying I can see a signal that does have an envelope roughly shaped like a BPF
although it's far from flat in the passband.

The amplitude of this is affected by the output power setting and is present
with the KPA500 in Standby.  It also seems to be thermally sensitive; becoming
less conspicuous the longer things run.

Wes  N7WS

.


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[Elecraft] Seeking input on KPA1500 station configurations

[Dan Atchison via Elecraft]

Not sure if this has been suggested or not, but .  .  .  .

If you have plenty of room -- and you're not doing anything else(!), I 
think it would be interesting to have a PTT counter - a count of how 
many PTT closures during its lifetime.


73,
Dan


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[Elecraft] KPA1500 Back Panel Pic

[Dan Atchison via Elecraft]

Can anyone venture a guess as to what the "cable" is underneath the 
amplifier in the back panel photo?  Also, what type of connection is 
used for grounding?


Dan -- N3ND
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[Elecraft] KPA1500 LCD backlight

[Dan Atchison via Elecraft]

Dunno if anyone mentioned this, but the backlight for the LCD display on 
the KPA1500 seems to be a bluish color unlike the current K-Line gear.   
I'm wondering if this is to help match the new K4? Just thinkin'


73,
Dan -- N3ND


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[Elecraft] MACROS

[Dan Atchison via Elecraft]

I've built countless macros for controlling many things in the K3(s), 
P3, and now KPOD, but there is one command that is either lacking or I 
can't seem to locate it. Help me here.



I need a "wait" command that would allow the macro title to appear on 
the VFO-B display for a defined time limit before extinguishing itself 
automatically.  Right now I build macros with many semicolons (;) prior 
to a final "MN255;" command, but the macro build limits the macro field 
to 120 characters and the resultant display time is too short.


I'd like to see a "WAIT" command that would allow a pause of  
milliseconds before enacting the next command in a macro line.  Now more 
than ever, with the KPOD, it would be nice not having to extinguish a 
macro name from the VFO-B display without having to touch the radio 
front panel.  (WA;  ?)



Dan -- N3ND



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[Elecraft] KPOD

[Dan Atchison via Elecraft]

My KPod arrived today after spending an additional day at the post 
office (actually they had no one to drive the truck yesterday!  What a 
way to run a business).



I've gotta tell ya that those 0603 resistors are a tough nut to handle.  
I managed to stack that supplied SMD resistor on top of the old R82 
while severely burning my left index finger.  It's not fun soldering 
under a magnifying glass but I still love the challenge.  I'm saving the 
leaded resistor for my other K3.



First impressions are good.  See the "half" turns count issue already 
discussed but after playing with it for a while I find that I like it.  
Now to fix the SFI.



73,

Dan


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[Elecraft] Will the K4 look like this?

[Dan Atchison via Elecraft]

The MB1 Transceiver

http://sunsdr.eu/product/mb1/

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[Elecraft] K3 Hum on mic between 2 rigs

[Dan Atchison via Elecraft]

I built a nice boom microphone switch to swap my Heil PR781 between my 
K3S and my K3.  The switchbox uses XLR connectors so I can use the Heil 
K3 "proper" cables to each rig.  I bought a regular XLR extension cable 
for the mic to swithbox.


Well, I used a DPDT switch to switch both pins 1 and 2.  Hum. Then I 
used a 3PDT switch for switching all pins, 1, 2, 3.  Hum.


Notice both Heil cables have outer shell at rig tied to mic low. Don't 
wanna cut this wire, or should I?


Now all this said, I am powering each rig from a separate power supply.  
My question is, before I go to the expense of purchasing a power supply 
large enough to power box rigs at the same time, will this eliminate my 
hum or ground loop?


Thanks in advance.

73,
Dan

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[Elecraft] KX3 Multi-two environment

[Dan Atchison via Elecraft]

Has anyone used a KX3 in a multi-two environment? Low power?  High 
power?  Specifically, how'd it hold up?

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[Elecraft] K3/K3S Pin 1 question

[Dan Atchison via Elecraft]

I am building a switchbox to allow use of a Heil PR-781 microphone to be 
used by my K3S and K3, the switchbox using XLR connectors.  I note that 
in the Heil XLR cable ended in an 8-Pin Foster has mic low (-) tied to 
ground and (+) tied to mic high.


Knowing that the XLR pin 1 should be chassis ground, my question is, "At 
the switchbox, should I tie XLR pins 1 and 2 together and only switch 
XLR pin 3 between radios?"  IOW, should XLR pins 1 and 2 be chassis 
grounded or should I chassis ground pin 1 and switch both XLR pins 2 and 3?


Thanks in advance.

73,
Dan

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[Elecraft] KIO3B

[Dan Atchison via Elecraft]

If I recall, the K3S has now caught up with orders. If that is true, 
when can we expect the KIO3B module to be offered for K3 upgrades?


Dan -- N3ND
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Re: [Elecraft] I wonder how many folks have had buyers remorse on a K3/K3S purchase?

[Dan Atchison via Elecraft]

Sorry for the bandwidth, but I just had to chime in.

Bought my K3 in 2008.  Was astonished at it's performance.

Bought my IC-7600 in 2010.  Boy, what a beauty of a radio that ICOM is.  
Beauty on the outside; much less stellar on the inside.


I decided I'd keep the ICOM as my backup rig and eventual SO2R second 
radio until something better (or a K4) came along.  Most of the past 5 
years it has collected dust because the performance is lacking in 
comparison to the K3.  True A/B switching proved that early on.  It was 
relegated to that beautiful radio for non-hams to see status.


Then the K3S comes along and I order one at Dayton.  I have done and 
continue to drink the Elecraft cool-aid.  No other manufacturer has 
given the vast majority of the ham community what they want.  It's all 
about performance; It's what's inside that counts.


I have a pristine IC-7600 for sale if anyone is interested.

73,
Dan


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[Elecraft] K3 VOX by mode only?

[Dan Atchison via Elecraft]

I'd like to use VOX on digital modes, but never on phone and I see no 
way to set it up by mode such that the gain can be set to a certain 
value on phone (000), but higher on digital modes.  Am I correct?  Yes, 
I know I can turn it on and off manually.

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[Elecraft] 200 Hz 5-pole filter

[Dan Atchison via Elecraft]

Am looking for a K3, 200 Hz 5-pole filter since Elecraft no longer sells 
them.  Anyone out there have a spare?


73,
Dan - N3ND
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[Elecraft] Dayton Orders

[Dan Atchison via Elecraft]

Just curious if anyone has yet received a confirmation of orders placed 
at Dayton?


Dan -- N3ND


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