Re: [Elecraft] KAT500 beta 2.04

[Mike Cox]

It looks like the utility is for 64 bit Windows only...

On 10/6/2021 11:27 AM, Andy Durbin wrote:

https://elecraft.com/pages/kat500-fully-automatic-tuner-firmware-and-utility

New KAT500 firmware and also a new Utility version.   Quite a few issues fixed 
that are not mentioned in the release notes.

I'd like to thank Dick, K6KR, for his patience as we worked though my defect 
reports and enhancement suggestions.  I learned a lot from our discussions as 
this firmware update slowly matured.

All of my alpha testing was with a Kenwood TS-590S.  Hopefully owners of other 
rigs will try this beta and report any issues.

73,
Andy, k3wyc
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Re: [Elecraft] Sherwood Engineering

[Mike Cox]

Check  for his information.

...Mike, AB9V

On 5/5/2021 8:28 AM, Richard Donner wrote:

I noticed that sherweng is gone from the internet.
Anyone have information about this?
tu
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Re: [Elecraft] KPA1500 goes into firmware load

[Mike Cox]

Mine's done this since day one. Since it's in my shack, I just reload 
the firmware and go on. It seems to occur most often after a power 
outage on the 240 VAC line though I've seen it occur with normal 
turn-on/off and (very infrequently) while just sitting there idle. My 
power supply is normally always on and the amp powers up via the +12 
Volt sense driven by the K3. A couple of guys at Elecraft were working 
with me (before Covid) to resolve this problem but we never determined 
anything. I think they believed I was making this stuff up. It only 
happens every few weeks so is not a major annoyance but I surely would 
like to have it resolved. Incidentally, I normally run the amp via 
KPA1500 Remote connected via ethernet and seldom touch the front panel. 
The K3 is on a very heavy duty UPS so it never powers off except via 
it's front panel.


Good luck!,
Mike, AB9V


On 1/12/2021 14:13 PM, Gary Johnson wrote:

We have a K3 and KPA1500 at a remote site. The KPA has 240V applied to it all 
the time, and actually turns on with the K3 via the Aux Bus. We use the remote 
control application via Ethernet. Works great. Occasionally, the amp won’t turn 
on, and when we investigate, it’s in the firmware load state. The KPA1500 
Utility is then able to reload it via USB, and we’re operational again. Nothing 
on the computer should be accessing its USB port to cause it to go into that 
state. I have noticed that if we cycle the 240V power, sometimes that will put 
it in firmware load as well. Is there a common cause here?

-Gary NA6O
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Re: [Elecraft] KPA-1500 failed!

[Mike Cox]

oops... can't type... obviously, I'm using my KPA500 and KAT500 now...

On 2/23/2019 20:13, Mike Cox wrote:
I'm avoiding it now! My KPA1500 died for the second time since it 
arrived last September.  I contacted service last Thursday and, per 
request,  sent them my configuration information. Nothing has been 
heard since.


Now my "old" KPA500 and KPA500 are back in line and working fine! That 
appears to be a good fix as they've never let me down.


Mike, AB9V

On 2/23/2019 18:32, Paul Baldock wrote:

Eric -

I know a number of KPA1500s have been returned to you with one of the 
output transistors dead. Is there common source for the problem that 
the rest of us can try and avoid?


regards

- Paul

At 10:13 AM 2/16/2019, you wrote:

Hi Peter,

I'm sorry to hear about this failure and deeply apologize for the 
problem.


I'll follow up with another email to you to diagnose what actually 
happened.


In any case we'll deal with it quickly and get your amp repaired asap.

Eric
elecraft.com
_..._



> On Feb 16, 2019, at 6:28 AM,   
wrote:

>
> I was operating in the ARRL-CW contest this morning and on 20m, 
with a 1.2:1
> SWR on the Yagi, all of a sudden I saw my power drop to about 
450-500W with
> about 40W in. Worked a few stations but not as easily as when I 
turned
> everything on this morning. Switched over to phone and made a few 
contacts.
> Audio is fine barefoot with 100W out of the K3s-which suffered 
blown finals
> itself during CQWW SSB last fall, but with the amp in I got 
reports that my

> audio was badly distorted.
>
> Before I send it in, is there anything I should look at or any 
diagnostics I
> can easily perform? For the cost of this, I'd have thought 
protection would
> have kicked in to prevent anything untoward from happening. I'm in 
complete

> disbelief, to be honest.
>
> -
> 73 and Good DX
> Peter, W2IRT
>
>
>
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Re: [Elecraft] KPA-1500 failed!

[Mike Cox]

I'm avoiding it now! My KPA1500 died for the second time since it 
arrived last September.  I contacted service last Thursday and, per 
request,  sent them my configuration information. Nothing has been heard 
since.


Now my "old" KPA500 and KPA500 are back in line and working fine! That 
appears to be a good fix as they've never let me down.


Mike, AB9V

On 2/23/2019 18:32, Paul Baldock wrote:

Eric -

I know a number of KPA1500s have been returned to you with one of the 
output transistors dead. Is there common source for the problem that 
the rest of us can try and avoid?


regards

- Paul

At 10:13 AM 2/16/2019, you wrote:

Hi Peter,

I'm sorry to hear about this failure and deeply apologize for the 
problem.


I'll follow up with another email to you to diagnose what actually 
happened.


In any case we'll deal with it quickly and get your amp repaired asap.

Eric
elecraft.com
_..._



> On Feb 16, 2019, at 6:28 AM,   
wrote:

>
> I was operating in the ARRL-CW contest this morning and on 20m, 
with a 1.2:1
> SWR on the Yagi, all of a sudden I saw my power drop to about 
450-500W with

> about 40W in. Worked a few stations but not as easily as when I turned
> everything on this morning. Switched over to phone and made a few 
contacts.
> Audio is fine barefoot with 100W out of the K3s-which suffered 
blown finals
> itself during CQWW SSB last fall, but with the amp in I got reports 
that my

> audio was badly distorted.
>
> Before I send it in, is there anything I should look at or any 
diagnostics I
> can easily perform? For the cost of this, I'd have thought 
protection would
> have kicked in to prevent anything untoward from happening. I'm in 
complete

> disbelief, to be honest.
>
> -
> 73 and Good DX
> Peter, W2IRT
>
>
>
> __
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Re: [Elecraft] K3S 6M Tune Pwr

[Mike Cox]

Both of my K3S's do exactly the same thing here. Both are running F/W 
5.66. I reverted one to a previous F/W (version 5.64) and the same 
symptoms persisted. I did not measure the actual output with an external 
Wattmeter; these are the values as reported by the K3 itself.


It's not a big deal for me but it certainly seems curious.

Mike, AB9V

On 2/2/2019 12:49 PM, Bob McGraw K4TAX wrote:
I've seen consistently that the 6M TUNE power on my K3S, s/n 10163 
defaults to 16 watts.   I have set the TUNE power at 20 watts and it 
performs correctly on all bands except 6M.   I've completed the TX 
Power Calibration with the K3 Utility.  All looks good there.    I 
have PWR Per Band set such that the KPA500 is driven correctly from 
the K3S.  The TUN PWR value as set in the CONFIG menu is 020 for 6M.   
But when TUNE is pressed the VFO B display is 16 watts and the 
measured output is 16 watts.   On other bands, when TUNE is pressed 
the VFO B display is 20 watts and the measured power is 20 watts +/- 1 
watt.    Also when the PWR is set to 100 watts, the 6M  measured 
output power is 100 watts +/- 10%    This is measured using  a known 
good 50 ohm dummy load and two different power meters to confirm the 
results.


MCU is 5.66,  FPF 1.26,  DSP1 is 2.88.    I think these are current.

Not a big deal in any way but just curious as to why?

Any ideas?

73

Bob, K4TAX


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Re: [Elecraft] [KX3] Urban stealth HF: Inside-the-backpack loop antenna?

[Mike Cox]

A proper shield of a KPA-1500/PS with battery and 240VAC inverter should 
be adequate protection if stuffed between the antenna and your backside ;-).


... Mike

On 1/23/2019 11:34 AM, Wayne Burdick wrote:

The entire purpose of the exercise is to be able to operate while walking. If 
the field is a potential health risk, power would have to be dropped 
accordingly.

Wayne



On Jan 23, 2019, at 8:28 AM, Jim Miller  wrote:

I assume that this "backpack frame antenna" wouldn't be actually used when 
being worn. The circulating currents in a Hi-Q loop result in strong RF fields along the 
loop axis which should be avoided in use.

jim ab3cv

On Wed, Jan 23, 2019 at 11:21 AM Wayne Burdick  wrote:
Wish I had time to build one of these myself! A few other things in the 
queue

Wayne
N6KR



On Jan 23, 2019, at 6:32 AM, 'Dale Parfitt' pari...@frontier.com [KX3] 
 wrote:


HI Wolf,

VK3YE could have done so much better from an efficiency standpoint without 
making the loop any larger.

1. Flat metal stock is not as efficient as round stock (of the same 
circumference) because current crowding at the edges of the rectangular stock 
makes it appear smaller in surface area.

2. A much lower D capacitor such as a dual gang air variable with the gangs in 
series (to avoid resistive losses in the bearings) or  a butterfly would also 
have aided in  higher efficiency.

3. Copper would have helped efficiency  somewhat with its lower RF resistance 
and ability to be soldered  versus mechanical connections, but that is 
partially offset by aluminum’s larger skin depth. Of course copper is heavier 
and more expensive, but in tube form the weight issue could be minimized..

  


Just some thoughts. Again, the VK1OD calculator allows one to make precise 
efficiency measurements so even small improvements can be measured.  As an 
example, the difference in efficiency between using  braided coax as the loop 
radiator versus hardline or copper tubing is readily apparent. For the same 
diameter loop and same conductor diameter, a narrower bandwidth  means higher 
efficiency.

  


Dale W4OP

  


From: k...@yahoogroups.com [mailto:k...@yahoogroups.com] On Behalf Of 'Wolf 
Hoeller, OE7FTJ' wolf.oe7...@gmail..com [KX3]
Sent: Wednesday, January 23, 2019 4:57 AM
To: k...@yahoogroups.com
Subject: Fwd: [KX3] Urban stealth HF: Inside-the-backpack loop antenna?

  

   


Wayne,

  


a really good idea.

Have a look at VK3YE's youtube channel for his experiment to put a loop antenna 
in (frame of) a notebook bag. https://www.youtube.com/watch?v=BC5lFbLqaeg

  


Another good idea for a stealth antenna has the spain company Inac. Here is the 
suitcase with a loop inside the frame: https://www.inac-radio.com/MAK721PRO

  


I would like the idea, to sit in an urban park with my backpack or similar on 
my knees and make some contacts.




Wolf, OE7FTJ

Emergency Communications via Winlink Global Radio Email ®️

  

  

  


Am Di., 22. Jan. 2019 um 21:57 Uhr schrieb Wayne Burdick n...@elecraft.com [KX3] 
:

   


I’ve engaged in plenty of ultralight HF pack operation, with a KX2, AX1 antenna 
and a dragged counterpoise. In wide open spaces it’s a blast. But urban 
settings with dogs, wire-eating cacti and overzealous Neighborhood Watchers can 
distract from one’s radio experience.

  


So, just for grins, I’d like to try something completely incognerdo: no visible 
antenna. A small remotely tuned loop (say 12” diameter) would seem to be the 
best choice, as it would fit entirely inside a small backpack. It could have  
modest efficiency while not requiring a counterpoise wire. Rigid 1” copper pipe 
formed in a square would be convenient to deploy.

  


The loop would be only 6 to 8” from soft tissue, so you’d want to run QRP, of 
course.  OTOH, we’re talking about HF. A cellphone by your ear is probably 
worse.

  


Any other antenna suggestions?

  


Wayne

N6KR

  

  



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Re: [Elecraft] Killed the KPA500 :)

[Mike Cox]

It's a MENU selection ... See MENU>PWR--ON ...

On 11/16/2018 8:57 AM, Michael Blake via Elecraft wrote:

My KPA500 does not power up in operate.  It always powers up in Standby.

73 - Mike - K9JRI







On Nov 16, 2018, at 8:52 AM, Michael Walker  wrote:

I have the schematics, as someone was kind enough to send them to me.

Yes, I forgot the KPA500 powers up in Operate.  It is the only Amp I own
that does this.

I will mention it to Elecraft when I chat with them later today and suggest
the default should be the other way around.

Mike va3mw


On Fri, Nov 16, 2018 at 8:27 AM ANDY DURBIN  wrote:


"The unit was powered on and it came up in operate mode while the HF radio
was in TX at 100w on 6M. End result is that the magic smoke got out. :)"


I suspect this is a very common mistake for ops who sometimes use the amp
and sometimes operate barefoot. I thought the KPA500 was designed to
protect against that user error. Seems I was wrong.


Suggest you contact support for schematics. Unless their policy has
changed recently they will provide them to you.


Andy, k3wyc
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Re: [Elecraft] K-Pod CTS to match VFO

[Mike Cox]

I'd use this for sure!

Mike, AB9V


On 10/3/2018 12:27 PM, NW0M wrote:

Art,

I've been for this too.  Wayne said a couple years back that they were going
to add this to the firmware.  I guess we're the only two K-Pod owners that
want this.  I'm not calling this a major enhancement request but it would be
a nice one.

73,
Mitch NWØM



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Re: [Elecraft] Second speaker just turns off K3S

[Mike Cox]

I had this issue also but I've not seen it happen since loading beta 
firmware 5.64 (which has an adjustment to fix this). It's caused by an 
over-current condition sensed by the K3 when both audio channels are 
loud enough to cause brief over-current conditions.


Good luck!

Mike, AB9V


On 4/27/2018 13:31 PM, IK4EWX wrote:

Dave, you dont make any mistake.
This happen also to me.
I have a K3S with two Elecraft SP3 speakers and P3.
I havent understood why the K3S change from 2 SPKR to 1 SPKR.
But now I know that when the right speaker cease to work i should open
CONFIG and reset it to SPKR 2 becouse it had changed to spkr 1.
At first I though that it was rfi, but rfi doesnt change config menu, after
I thought that it was reprogrammed when I opened  WIN4K3Suite, but it happen
even without using this program.
I haven't understood why it happen.
Sorry.
73 de Ian IK4EWX



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Re: [Elecraft] K3 Switches Number of Speakers

[Mike Cox]

My k3s occasionally does this too. I finally isolated the problem 
initiator as a burst of very loud signals, such as occurs when listening 
to a very weak DX station when a very strong (speaker rattling) station 
plops on top of him followed by the loud frequency cops. The Sub Rx must 
be is on and the volume for Main Rx is cranked up for the weak station. 
A single loud signal does not appear to initiate the SPKRS parameter 
change. It appears to only happen with multiple loud signals in the 
passband. These signals will be loud enough that I turn down the volume 
very quickly. During this loud outburst, the SPKR config will change to 
"1". I have set up a macro button to toggle the SPKRS configuration so 
that I can quickly return it to "2". If I turn the volume down a bit, it 
doesn't do this so I'm wondering if there's some "safety" mechanism 
built into the audio driver control circuit/firmware. Is it due to 
mixing of close frequency audio signals in a non-linear audio amp 
(clipping mode) producing sub-audible products? I don't know, it's just 
a thought. It's only an occasional annoyance for me so I've never 
pursued a cure.


My AF LIM parameter is currently set at 30 but I seldom have AGC off. It 
does it with AF GAIN "HI" or "LO" but if the gain is set "LO", I must 
turn the volume knob up more to compensate so I end up listening at the 
same relative audio levels. I'm running LP Bridge and at least one 
logging program and a K-Pod but have no other macros that directly deal 
with the SPKRS parameters. My sub Rx card is an older version retrieved 
from my original K3.


A cure or a work-around would be nice,

Mike, AB9V


On 1/30/2018 11:21 AM, Chester Latawiec wrote:

My old K3 occasionally switches from 2 speakers to 1 speaker (makes it really 
tough to listen split chasing DX)!


Any ideas what may be causing this?


73

Chet VE3CFK


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Re: [Elecraft] Antenna Analyzer

[Mike Cox]

These were very useful devices from "back in the day". I see a couple 
available on ebay by searching for "Palomar noise bridge"


Mike, AB9V


On 12/1/2017 7:49 AM, w5...@comcast.net wrote:

just a quick question for the collective group here. I have built up my KX-2 
travel kit. The first week of november I took it with me to a  cabin I leased 
outside of Gatlinburg, TN for some portable operating when I wasn’t up in the 
mountains hiking. I took m y Super Antenna MP-1 plus the parts to throw up a 
full wave loop for 40M. I did throw the loop up, and it out performed the MP-1 
by kudo’s.  But it struck me that it might be nice to add a small antenna 
analyzer to my kit.
I don’t need a big full size MFJ, which I do have. But something small.  Any 
experience here y’all?

thanks in advance for your answers

Ronnie W5SUM
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Re: [Elecraft] K3 Receiver mush

[Mike Cox]

If CONFIG:PB CTRL is set to .01 in CW mode, then, per the function 
description in the K3 Owners Manual (pp. 62 in Manual Revision A1), you 
will be limited to the Shift/Width controls mode only. Change PB CTRL to 
.05 and you will also enable LO/HI cut on the controls.


73,
Mike

On 2/26/2017 10:13 AM, Ted Bryant wrote:

In playing with Bob N6TV's suggested settings, I've discovered that on CW,
neither the Shift->LO Cut nor the Width->HI Cut controls change functions
when tapped.  They appear fixed at SHIFT and WIDTH.  Tapping them merely
displays their current setting.  On SSB, they change and work as expected.
Is there a parameter setting somewhere that affects this?  I've looked
through the release notes but see nothing.

Using the latest firmware: 5.57

73, Ted W4NZ




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Re: [Elecraft] KE: issue with installation of K3EXREF interface

[Mike Cox]

Mine broke off too. It appeared for be a crimped ferrule but it split 
and fell off as though it were already fractured. I carefully soldered 
the coax braid to the connector to maintain the electrical connection. I 
was careful not to overheat and melt the dielectric of the coax which 
could have shorted the center conductor to the shell. It's working well!


Mike, AB9V

On 4/2/2016 16:16 PM, Jim Spears wrote:

While installing the K3EXREF SMA-TMP cable, I ran into an interesting issue
which I do not yet know if it is a problem or just interesting.

  


There is a ferrule or something similar over the cable where it attaches to
the SMA fitting that is installed on the back panel.  while tightening the
hex nut down, I must have torqued something as the ferrule broke into two
pieces and fell off.  I finished off the installation and verified that the
GPSDO does provide a suitable 10 MHz signal into the radio.

  


So the question becomes:  is this interesting or a problem?   I took a close
look and the problem might be improper grounding of the shield to the
chassis at the SMA connector end.

  


If it is deemed to be a potential problem, I can request a new cable from
support.  It will not take long to replace the cable.

  


Jim/N1NK

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Re: [Elecraft] Getting Logger+ tx audio via K3s USB audio codec

[Mike Cox]

Don't have a LINE IN plug inserted in the K3, otherwise it uses it 
instead of the internal sound card.


73,
Mike, AB9V

On 12/12/2015 8:46 AM, Barry N1EU wrote:

Would appreciate any tips to getting the N1MM Logger+ soundcard voice
keyer properly keying/driving my K3s via the internal USB soundcard.
My USB-connected K3s is running fine with N1MM Logger+ and "USB Audio
CODEC" selected as my Radio 1 output device.  I've got MIC + LIN On
and I see the wav file properly moving the level meter in Windows
sound and the level is set at 100, but no tx audio on the K3s.  It
appears that everything is working as it should in Logger+.   Is there
a separate LIN level control I need to adjust on the K3s or some other
reason I'm not seeing tx audio being driven?

Thanks & 73,
Barry N1EU
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Re: [Elecraft] K3/K3S firmware rev. 5.32: Sub RX mismatched filter fix; "Safe" option for PTT-KEY via USB; new remote control commands; etc.

[Mike Cox]

I've loaded 5.32 wondering what it does for diversity reception. Here's 
my observations:


My radio is the K3S (built last Saturday). The mismatched filters were 
robbed from my old K3 (s/n 398) along with the sub Rx and transplanted 
into the new K3S. The "old" radio also has the new Synth boards. In that 
previous radio I ran diversity without the 200 Hz filter enabled in the 
sub receiver, using instead the stock 2.7 KHz filter which had an offset 
nearly identical to my main Rx 200 Hz filter.. My 200 Hz filters were 
not matched, having been ordered separately at different times. One is 
-.91 and the other is -.72 offset. In the past I had tried to set a 
compromise of about -.80 on both filters for reasonable diversity but 
then they were so poorly aligned that sensitivity and passbands suffered 
from being on the steep slopes of the filters. 200 Hz. filters just 
don't allow much latitude to compromise the offsets.


Now with FW 5.32 I'm listening through both filters at 150 Hz bandwidth 
in diversity mode with the filter offsets at their prescribed amounts. 
I'm currently listening on 30 meters. I'm hearing weaker signals gently 
passing between my ears very slowly with no particular rhythm and with 
no woosh-woosh. Those of you using diversity will know what I mean. It's 
great! My antennas are a 1/4 wave sloper on the main and a Pixel loop 
antenna on the AUX input to the sub receiver. I now don't see a real 
need to have the 5 pole filters matched to achieve great diversity 
reception. This setup is sounding great! I LOVE IT!


Without diversity reception I would not have 160 Meter DXCC from my 
small, noisy city lot. Now it's just gotten better.


Great job, Wayne and guys and gals! A great product just keeps getting 
better!


73,
Mike, AB9V



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[Elecraft] New KSYN3AUPG Installation

[Mike Cox]

After my initial report of "no obvious difference" in the receiver 
performance after first installing the new K3 synthesizers, I've now had 
the pleasure of using them in the ARRL CW DX contest on 40 meters last 
night. Let me preface my observations by saying that I normally run my 
DSP at 150 Hz bandwidth after the 5 pole 200 Hz filter. My antenna is a 
1/4 wave sloper from the top of a 48' tower with a 3 element Steppir on 
top. After 10 PM from central Indiana last night, 40 meters was 
wall-to-wall signals from Northern Asia, all of Europe, Africa and even 
into the South Pacific. This was great real-world test conditions!


In short, there IS a difference and it IS noticeable without using lab 
test equipment! The reward is of being able to more easily hear really 
weak ( < s3 ) stations sandwiched between other louder stations, often 
with less than 200 Hz spacing between them. It's sometimes like the 
unwanted signals are just not there, even though I can watch then on the 
P3. The band also just sounds quieter between signals, even though there 
were dozens of big signals within 5 KHz of my tuned frequency. Don't get 
me wrong, the radio was previously very good in these types of 
conditions. It just seems to me to be better now! It made me smile. It's 
also even more obvious who's rigs have offensive transmit characteristics.


I'm really enjoying the change in my K3! It will be even more fun in the 
ARRL 160 contest next December.


So now I'm drinking my morning coffee and watching the snow pile up. 
Perfect contest weather!


Back to it...
Mike, AB9V

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[Elecraft] New KSYN3AUPG Installation

[Mike Cox]

I installed the new K3 synthesizer boards last night into s/n 398 (with 
sub Rx). The installation was very easy, requiring only the removal of 
the top cover and the old synthesizer boards. I didn't even remove the 
rig from the operating table, electing to sit my anti-static mat in 
front of the radio and wearing the grounding strap. The radio remained 
connected with +12 power turned off (it would have taken me more time to 
rewire the radio into the station than was required for the actual board 
swap). Total installation time was about a half hour.


The radio powered up without incident and is performing as it should. 
Config: VCO MD is still present but only displays "--" as it is no 
longer needed to align the synthesizers.


As one would expect, there is initially no obvious difference in the 
before/after modification as far as the function of the radio. It 
"sounds" the same as before. Since I only have one K3, I can't do a 
quick-change A/B comparison of before and after. I'm not set up to 
perform the types of measurements required to accurately measure the 
changes regarding phase noise. I'll just have to take the word of others 
that the radio is now able to perform at a better level than before. I 
may be able to tell an improvement in CW keying timing at 35+ wpm but it 
may be my imagination. It does sound good! Here's where performing a 
before/after test would have real meaning to me.


But once again, I'm able to update my old K3 with the latest changes and 
make it function as a new radio. I didn't have to buy a whole new radio! 
That's pretty neat! I've saved so much money over the past years (not 
having to buy a new radio) that I probably should go out and buy a 
second K3. Maybe if Wayne would give me a hat...


I'm going to be operating for a while in the ARRL CW DX contest this 
weekend so I'll give it a practical test. From my perspective there's 
probably no compelling reason to make the synthesizer swap but in 
theory, it should be an even quieter transmitter with regard to phase 
noise and the cw keying may be a bit cleaner with reduced lock-up time 
on the synthesizers. It's an easy board swap!


73,
Mike, AB9V

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Re: [Elecraft] K3 - PA Temp Unstable

[Mike Cox]

Thanks Wayne. I suspect that you are right. I'll collect the parts and 
have them ready to go if the problem starts up again. Replacing header 
pins like these is something I've done many times before so I anticipate 
no problems with the repair. This radio has performed extremely well in 
almost daily use for many years now. The fan speed/temperature 
indication issue has been only a minor annoyance that I would have fixed 
already if it weren't so intermittent.


73,
Mike

On 1/20/2014 19:06 PM, Wayne Burdick wrote:

If you put a DMM (voltmeter) on the associated pin, you should see the voltage 
changing (a few mV, probably). You can easily get at these pins by taking the 
bottom covers (A and B) off the radio. Chances are that the old, non-gold pins 
on the front panel module are the cause.

73,
Wayne
N6KR

On Jan 20, 2014, at 7:16 AM, Mike Cox  wrote:


I'd like to see how this is resolved. I note the silence about it after your 
post.

My early K3 (sub s/n 500) started doing this same thing intermittently several 
months ago. The problem occasionally got bad enough that the rig would cut back 
to low power mode and report the PA over temperature.  The problem would 
manifest itself upon power up after the radio had been off overnight. Usually 
within and hour after power-up the PA temperature report would stabilize and 
all was well. I pulled the PA board off and did the gold pin replacement but 
this did not resolve the issue. A month or so later, the temperature report 
stabilized. I have not yet pulled the front panel to change out to gold pins in 
that area. As the radio has not exhibited this behavior for the past month, I'm 
holding off until I can tell that I've fixed it (or not) when I work on it. I 
love repairing intermittant issues (not!). Anyway Paul, your problem is not 
unique.

73,
Mike, AB9V

On 1/18/2014 3:41 PM, paulb wrote:

Hi  folks

K3 here owned for about 4 years.
Latest firmware.
Last couple of days at power up the PA Temp is unstable.
LCD flicks between 27 and 40 degs C.
TX and RX same reading.
Noticed the rear fans starting and stopping
Reloaded firmware no change.
Before lifting the hood anyone got a pointer what to
check ?


thanks

cheers

Paul b
zl1ajy





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Re: [Elecraft] K3 - PA Temp Unstable

[Mike Cox]

I'd like to see how this is resolved. I note the silence about it after 
your post.


My early K3 (sub s/n 500) started doing this same thing intermittently 
several months ago. The problem occasionally got bad enough that the rig 
would cut back to low power mode and report the PA over temperature.  
The problem would manifest itself upon power up after the radio had been 
off overnight. Usually within and hour after power-up the PA temperature 
report would stabilize and all was well. I pulled the PA board off and 
did the gold pin replacement but this did not resolve the issue. A month 
or so later, the temperature report stabilized. I have not yet pulled 
the front panel to change out to gold pins in that area. As the radio 
has not exhibited this behavior for the past month, I'm holding off 
until I can tell that I've fixed it (or not) when I work on it. I love 
repairing intermittant issues (not!). Anyway Paul, your problem is not 
unique.


73,
Mike, AB9V

On 1/18/2014 3:41 PM, paulb wrote:

Hi  folks

K3 here owned for about 4 years.
Latest firmware.
Last couple of days at power up the PA Temp is unstable.
LCD flicks between 27 and 40 degs C.
TX and RX same reading.
Noticed the rear fans starting and stopping
Reloaded firmware no change.
Before lifting the hood anyone got a pointer what to
check ?


thanks

cheers

Paul b
zl1ajy





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Re: [Elecraft] AC Adapter Power Supply For KX3

[Mike Cox]

I'm using a DIN rail mount commercial supply made by Mean Well, model 
MDR-40-12. It's a switcher, it's small, and I've had no noise issues. 
It's output is adjustable from about 12 to 15 Volts (screwdriver 
adjust). The continuous current rating is 3.3 Amps.


You can find them through a Google search. I bought mine from TRC 
Electric though I see that Mouser and many others also have them. Being 
a commercial supply, you must provide your own line cord (attaches via 
industrial screw terminals). TRC had them for under $25 though their 
shipping was a bit steep.


I'm not the only one I know of using this model supply with a KX3. I've 
heard no complaints.


Mike,
AB9V

On 2/27/2013 10:44 AM, Bob Schumacher wrote:

Elecraft does not sell a 13.6 VDC  "AC Adapter Power Supply" for the KX3. This 
is a very common product and there are many
alternatives on the market. Most of us have drawers full of these AC adapters. 
However, most are cheap, noisy switching power supplies.
Is there a recommended KX3 power supply that provides sufficient current to 
obtain the full 10 Watt output and yet not add to the nosie floor of the 
receiver?

Thanks,

W9DBR



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Re: [Elecraft] Sub Receiver Band Independence?

[Mike Cox]

More correctly, in CONFIG, set VFO IND to "yes".. typed too fast...

Mike

On 8/11/2012 13:39 PM, Mike Cox wrote:
> in MENU set VFO IND to "no"
>
> On 8/11/2012 13:14 PM, Ken Pyke wrote:
>> Hi, the bottom right of page 37 says "hold BSET, then tap BAND to select the 
>> SUB receiver's band.  Why can't I get that to work? Ken VE3YK Lake of Bays 
>> Ontario.
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Re: [Elecraft] Sub Receiver Band Independence?

[Mike Cox]

in MENU set VFO IND to "no"

On 8/11/2012 13:14 PM, Ken Pyke wrote:
> Hi, the bottom right of page 37 says "hold BSET, then tap BAND to select the 
> SUB receiver's band.  Why can't I get that to work? Ken VE3YK Lake of Bays 
> Ontario.
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Re: [Elecraft] RFI With KPA500 Full Output on 40m

[Mike Cox]

I had similar issues over the years with my GFI receptacles. I put 
ferrites on the power leads both at the receptacles and in the main 
distribution panel but was only able to reduce the problem and/or move 
it to other bands. I then tried different brands of receptacles and, 
after trying everything from Lowe's and Menard's, finally found that the 
Leviton brand GFI receptacles (I found them at Home Depot) completely 
eliminated my problems.

Mike - AB9V

On 3/18/2012 10:05 AM, Jim Sheldon wrote:
> For some reason, probably resonant length of coax or something, plus the 40 
> meter dipole runs directly over the house and parallel to the incoming power 
> service, Every time I key a rig with more than about 50 watts, I trip every 
> GFI outlet in the house.  I haven't found enough big snap-on ferrites to hit 
> all the romex coming out of the panel, but when I do, I'll certainly put 'em 
> on.  A really big one that would snap around the incoming line at the panel 
> would be nice, but so far I haven't found a source of snap on's that I can 
> afford.  Not sure either on what material would be best for that.
>
> Jim - W0EB
>
>>> When I crank my KPA500 up to full output on 40 meters, I get RFI
>>> on my
>>> home security system. Lights up all the remote panel lights and
>>> beeps.
>>> Luckily it does NOT set off the alarm. If I back off output to
>>> 350 watts
>>> or so, no RFI problem. Both ends of my RG-8 coax have ferrite
>>> chokes. This
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Re: [Elecraft] K3: Firmware 4.39

[Mike Cox]

  It looks like it's now the current production release.


On 8/9/2011 17:10 PM, DL5OCD wrote:
> Hi group,
>
> does anybody know why the latest beta was deleted (only ZIP file) from the
> server ? Is it withdrawn ?
>
> 73
> Michael
>
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Re: [Elecraft] Elecraft General Interest: SFGate: Robert Helliwell, radio science pioneer, dies

[Mike Cox]

  Just for a bit of nostalgia, I also had a CK722 (back in the day) 
which I paid about $10 for. My 2N107's legs had previously fallen off 
and this was what I replaced it with. I still have it so here's a 
picture of one of the prettiest transistors ever made sitting on the 
screen of a current production version of a truely classic scientific 
calculator.

http://ab9v.us/a1DSC_2047-1024.jpg

73,
Mike, AB9V


On 5/26/2011 13:42 PM, Jim Dunstan wrote:
> At 10:49 AM 5/26/2011 +0100, you wrote:
>
>>>With great delight over the years, he regularly welcomed visitors to his
>>> lab to listen to what he called his "whistlers," the eerie electrical
>>> warbling generated by lightning flashes in Canada's Arctic and that had
> Hi,
>
> Just a short line (off elecraft topic ... forgive me) ... when I was15
> years old I bought my first CK-721 transistors (Raytheon) and built a
> '"whistler" receiver after reading a Scientific American article.  Maybe
> the article  was written by Professor Helliwell ... I can't recall.
>
> The receiving setup is a large 4' diameter loop of many turns (maybe 30-50)
> of copper wire (salvaged from old transformers) connected to a diode
> detector and high gain audio amplifier.  Essentially an audio frequency
> crystal set followed by a high gain audio amplifier.  I hung the loop
> vertically in the attic.  It was possible to hear "whistlers" from storm
> centers long before you could hear the thunder.  Whistlers appear to be
> electromagnetic waves that fall within the the audio frequency spectrum,
> but they cannot be detected directly by the ear.
>
> By the way the CK-22 which I originally ordered was priced at over $20.00
> ... by time I sent away for one, similar CK-721's were already surplus and
> I could get a handful for $5.00 ... an early indication of the speed of
> technological change !!
>
>
>
> Back to Elecraft topics hi
>
> Jim
>
> VE3CI
>
>
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Re: [Elecraft] Split fail to engage

[Mike Cox]

  Are you sure it's not working? The VFO A and VFO B frequencies do not 
visibly change when you transmit spit with this radio. Some radios 
visibly "swap" the A and B frequencies when transmitting; the K3 does 
not. Try listening with another radio and check to be sure. The only 
visible indications are the "Delta f" yellow light will illuminate, the 
"Split" annunciator will be seen and the little black arrow by th "TX" 
legend will point to VFO B.

Mike

On 3/14/2011 14:22 PM, N1IRB wrote:
> I've tried a search of the forums but split is an excessivly common term hi
> hi.
>
> Please help. My split does not seem to be engaging. I'm in SSB and when I
> turn on split I get the indication in the window but I am clearly still
> transmitting on VFO A frequency. No idea why that might be.
>
> I don't need the 2nd reciever to work split do I?
>
> Thanks for any help/suggestions.
>
> Scott - N1IRB
>
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/Split-fail-to-engage-tp6170081p6170081.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] P3 magenta 'pointer' in display?

[Mike Cox]

  Your VFO B is off the screen in the indicated direction (down freq)

73,
Mike

On 1/20/2011 22:13 PM, Stan Gibbs wrote:
> I just upgraded to the 1.0 P3 firmware.  I notice a magenta triangle
> "pointer" on the left margin of the display.  Can someone explain what it's
> function is?  Or, is it only me that is seeing it?
>
>
> -
> 73, Stan - KR7C
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Re: [Elecraft] MMTTY FSK

[Mike Cox]

The only real difference I've heard is that on some strong signals you 
can occasionally hear the unwanted sideband mirroring the intended AFSK 
signal. This signal is at a level reduced by the unwanted sideband 
suppression characteristics of the transmitter involved and separated by 
twice the modulating tone frequencies. This might put the two signals 
over 4 KHz apart, making it not apparent who the culprit is. It's pretty 
easy to see the problem with a panadapter. Note that some current radios 
(for example. IC756ProIII) only rate their transmitted unwanted sideband 
suppression at -40 dB (K3 is -50 dB). Some older radios are much worse. 
An unwanted sideband of -40 dB from a 1.5Kw signal would be 150 mW. I've 
worked DX with less.

On 6/13/2010 17:07 PM, N1JM wrote:
> In  real world operating, has anyone really experienced a difference or could
> tell a difference?
>
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Re: [Elecraft] CW TX in SSB mode

[Mike Cox]

CONFIG --> CW WGHT
Tap 1 to toggle CW in SSB mode on/off

On 5/22/2010 9:05 AM, Gregg W6IZT wrote:
> I just received my K3 back from the factory for repairs. I am unable to get
> the K3 to TX CW while in SSB mode. Is there a setting to enable this that I
> am not aware of?
>
> Gregg
> W6IZT
>
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Re: [Elecraft] Iambic Keying

[Mike Cox]

Plug it into the "Key" jack, next to "Paddle"

On 5/17/10 5:28 PM, W4CCS wrote:
> Purchased a new Vibroplex at Dayton and having some difficulty getting
> it going. I have been using a keyboard for several years and wanted to
> maintain my sending skills (as much as they are).
>
> With the plug inserted in the "paddle" input, All I get is a dot dash
> dot dash no matter which paddle I push. I cannot see anything in the
> config menu that addresses this problem.
>
> Any ideas..??
>
> de W4CCS
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Re: [Elecraft] K3 Audio monitor delay

[Mike Cox]

no, I don't really notice it

but the (quarter to almost 1 sec) delay while operating full duplex on 
high orbit satellites AO-10, AO-13 and AO-40 was VERY annoying and often 
made me misspeak, almost like my tongue tripped over itself.

Mike


Tom Boucher wrote:
> Does anyone else find the processing delay in the sidetone monitor most 
> disconcerting when using SSB? 
>
> 73
> Tom G3OLB
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Re: [Elecraft] DIY DSP Rev D

[Mike Cox]

I guess another option could be to take your old board out of the radio 
and send it to Elecraft for a factory update and wait for it's return. 
Of course this would render the radio inoperable for that period of time 
but at least you would know that your "serial number vintage DSP board" 
matched your serial numbered radio. I think the current board swap 
program makes a lot of sense but maybe that's just me.

73,
Mike AB9V


Don Wilhelm wrote:
> Merv,
>
> I don't understand that logic.  See Eric's post from 9:08 PM EST today.
> What is wrong with getting a fully updated DSP board with a full 
> warranty to put into your SN 3000 K3.  Who cares what the serial number 
> of the K3 that board came from, it is a *new* board after it has been 
> upgraded and fully tested - there is no difference.  The board PC traces 
> and the solder do not wear out.
>
> If yours has been on order for 5 weeks, it should arrive soon.
>
> 73,
> Don W3FPR
>
> Merv Schweigert wrote:
>   
>> Bob Naumann wrote:
>> 
>>> Who said they "might even be reworked boards"?
>>>
>>> On what do you base this claim?
>>>
>>>
>>>   
>>>   
>> Somewhere either on this list or the elecraft site or ?? I read that
>> the boards were shipping up to 4 to 6 weeks late because of the
>> slow return of the old ones for rework. So yes it appears your getting 
>> a reworked board from someones
>> return.
>> So I would assume you could get serial number 20 board for
>> your number 3000 radio?   If wrong would appreciate being
>> corrected.
>> Mine has been on order for about 5 weeks or so now. 73 Merv KH7C
>>   
>> 
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Re: [Elecraft] K3 Switch Customization Info available in the K3 Programmer's Reference

[Mike Cox]

You're the MAN!

Thanks, Wayne
This is the most responsive, customer oriented company I have ever dealt 
with.

73,
Mike

Wayne Burdick wrote:
>
>>
>> Now for DSP macros so we can turn on the main Rx in both ears while 
>> searching for the QSX in the right only... ;-)
>
> I'm going to add the AF mixer command to the regular firmware soon.
>
> Wayne
>
>>
>>
>> Wayne Burdick wrote:
>>> If you'd like to get a better feeling for the kind of commands you 
>>> can  embed in a K3 switch macro, please see page 4 of the K3 
>>> Programmer's  Reference, available here:
>>>
>>>http://www.elecraft.com/manual/K3_Pgmr's_Ref_Rev_C3.pdf
>>>
>>> A number of practical macro examples are shown. Details on how to 
>>> use  specific commands can be found starting on page 6.
>>>
>>> 73,
>>> Wayne
>>> N6KR
>>>
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>>>
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Re: [Elecraft] K3 Switch Customization Info available in the K3 Programmer's Reference

[Mike Cox]

This is pretty cool! The installation and use of the new software went 
smoothly. I dove into customizing the "Quick Split" macro for my 
specialty; CW DXing. Using Wayne's macro as a start, I added the SB1 
command to (always) turn on the sub receiver and the BW$0080 to widen 
out the sub Rx to 800 Hz to aid in searching for the (sometimes) elusive 
QSX frequency of the DX station. I also changed the QSX to +1KHz since 
many CW DX guys who start out a session in simplex and then split as 
things get too busy for simplex, usually start at +1KHz.

The MACRO:
SWT13;SWT13;FT1;UPB4;RT0;XT0;SB1;BW$0080

Now when the weak DX that is annoying us all by working a simplex pileup 
finally says "up 1", a single button press gets you there before most of 
the rest! If the split is otherwise, I then only need spin the B VFO 
knob. I love it!

Mike

Now for DSP macros so we can turn on the main Rx in both ears while 
searching for the QSX in the right only... ;-)


Wayne Burdick wrote:
> If you'd like to get a better feeling for the kind of commands you can  
> embed in a K3 switch macro, please see page 4 of the K3 Programmer's  
> Reference, available here:
>
> http://www.elecraft.com/manual/K3_Pgmr's_Ref_Rev_C3.pdf
>
> A number of practical macro examples are shown. Details on how to use  
> specific commands can be found starting on page 6.
>
> 73,
> Wayne
> N6KR
>
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Re: [Elecraft] QSK With K3 and KW Amp

[Mike Cox]

I've run my SB-1000 with QSK-5 pin diode switch with no problems with my 
K3 using the KEY OUT signal.

-Mike, AB9V

Ed G wrote:
> Hello,
>  Is any anyone using one of the old DEO QSK-1500 full QSK switching
> units (or the similar PIN diode QSK unit from Ameritron) with their K3 and
> external amplifier? I haven't yet received my K3 but I would like to hook it
> up with my Heath SB-220 to run full QSK.  I suspect that I will need to use
> an external keyer (and not the one internal to the K3) to trigger the PIN
> diode switching electronics.  Same deal with software-generated CW.
>  If you are running full QSK this way with your K3, let me know if you
> experienced any problems setting up the switching, and if you are
> successfully running contest/computer software in the CW mode with full QSK.
> --Ed, N3CW--
>
>
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Re: [Elecraft] Mixing audio in split (sub RX)

[Mike Cox]

This is what I need too. I'm doing it now with an outboard mixer 
(Behringer XENYX802) to put the main in both ears and the sub in just my 
right. This subject was brought up a few weeks ago but it seemed to die 
without further comment from Elecraft. I'd sure like to be able to do 
away with the external mixer. My Orion and my old TS950SDX did this.

73,
Mike

g7vjr wrote:
> Hi,
>
> I've been absolutely thrilled with my K3 since the day it arrived. Before
> the K3 I had an Orion II. The firmware updates just never materialised -
> what a difference on the K3. Bravo Elecraft on a very slick operation from
> start to finish. I took mine down to ZD8UW and was very pleased with the
> excellent filtering on top band. Next time I'll be trying diversity RX with
> great interest!
>
> So my question is about the second RX. I use it to listen to pile ups while
> calling DX split. The way the audio is routed is 100% left for the DX, and
> 100% right for the pile up. I sometimes use an FT-1000MP where you can have
> the DX in both ears, and the pile up in one ear. This seems to work better
> to me, as it gives the DX audio the edge.
>
> I wonder if this is possible already on the K3 (so many choices in the
> menus!) but couldn't see it in the docs. If it's not possible, I wonder if
> it might be considered as a firmware change.
>
> Cheers and 73
> Michael G7VJR
>
>   
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Re: [Elecraft] K3 feature request

[Mike Cox]

Ouch.. that could blow the pin diodes or protection circuits in my 
internal Ameritron PIN5 QSK switch if the amp were in the "Operate" mode 
and RF were applied from the rig without the KEY line activated. It is 
imperative that the KEY line be actuated before RF hits the amplifier 
input to avoid damage to the pin diode switch. With Ameritron amps with 
an internal pin diode switch, the wiring is such that the only time the 
amplifier is actually bypassed is when the OPERATE switch is in STANDBY. 
Otherwise the path is to the amplifier input AND the pin diode switch. 
In this mode, the KEY line only goes to the pin diode switch, not the 
main OPERATE relay which would otherwise bypass the amp. I normally 
don't put the amp in the "Operate" mode until after the antenna is tuned 
using the normal K3 "TUNE" mode while the amp is bypassed. If I forget 
to tune the antenna first and operate the amp I get a huge reflected 
power (seen on the tuner bridge) but nothing catastrophic for a short 
operation of my AL-1200. If the KEY OUT is to be optionally disabled 
during K3 TUNE, it MUST be a menu selected option or it will result in 
damaged equipment.


Bill Johnson wrote:
> I would like the key out not to switch on the amp when tuning the antenna
> with a remote tuner without turning on the amp.  That way when I operate the
> amp is loading into a tuned circuit via the K3 tuning mechanism.  I have the
> ALS 600S
>
>
> 73,
>
> Bill
> K9YEQ
> K2 #35; KX1 #35; K3 #1744; mini mods
>
>   
>
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Re: [Elecraft] K3: The ARRL RTTY Round UP

[Mike Cox]

"Roger that" regarding shift and width granularity!

I had great success (for me) in RU using my 200 Hz 5 pole filter with 
the DSP width set at 200 Hz and moving the filter offset frequency (FLx 
FRQ) about 30 Hz from normal to center up the passband while looking at 
band noise with MMTTY. I used 1275 Hz Mark frequency. DSP LO was 1.3 KHz 
and HI was 1.5 KHz. Moving the filter offset allowed both mark and space 
signals to come through at similar amplitudes. If the DSP resolution 
below a few hundred Hz would switch to 10 Hz resolution, it would be a 
real help and should probably alleviate jockeying the filter offset. In 
my case sensitivity might improve a bit, too since my mark frequency was 
25 Hz outside of the stated DSP passband! With 10 Hz resolution,  the 
DSP could be set something like 1260 through 1460 Hz. (or whatever 
produces the best looking response in the desired audio passband) 
without tweeking FLx FRQ.  At any rate, even with 50 Hz granularity this 
setup allowed me substantially better copy of weak TTY signals in a 
crowded band than did the DUAL PB in the more conventional manner (while 
using MMTTY). The radio performed flawlessly for me in my first RTTY 
Roundup (Single Op, Low power, 530 Q's, 56 Sec,  35 countries, all S&P). 
The radio was run in the FSK D mode with data decoding always running.


Incidentally, my fancy new LCD computer monitor uses a capacitance touch 
power switch which would frequently turn off the monitor when I was 
transmitting on certain bands (40 or 20). But I never lost a Q because 
of this because I could always copy the RTTY on my K3 decoder display 
and would occasionally grab the paddles to send if the stations call had 
not yet been entered in the logging program (N1MM). It always took a few 
seconds for the monitor to reinitialize once I was able to turn it back 
on though it seemed much longer than that in the contest. My next ham 
radio task may be modifying this monitor.


73,
Mike

Guy, K2AV wrote:

Changing SHIFT and WIDTH granularity to 10 Hz from 50 would improve CW
useability as well.  


A lot of us have formed contest operating habits and tactics based on analog
SHIFT and WIDTH functions. Like a combination of a small shift and
(sometimes) a lesser width change to put someone up or down just a bit
farther down the passband and keep the same skirt frequency on the opposite
side of the passband.

73, Guy


wayne burdick wrote:
  

All RTTY issues noted, Dave -- thanks.

Congratulations on your excellent showing!

Wayne
N6KR

On Jan 5, 2009, at 9:00 AM, Dave Hachadorian wrote:



My pair of K3's also worked well in the RTTY Roundup - 1800
qso's. There are only a couple of issues that I saw:

1. On each transition between mark/space, there is a brief
upward power excursion. One of my amplifiers has an LED
wattmeter, and one of the LED's was blinking like crazy.
Also, the screen current on that amp was varying
significantly. I've complained about this in the past.
Elecraft is supposed to be working on it.

2. When you reduce the DSP bandwidth to 300 Hz, it is not
possible for me to get the audio output exactly centered
between the RTTY modem's mark and space detector. The SHIFT
control is too coarse. One click of the SHIFT control moves
the audio either slightly left of center, or slightly right
of center. It would be nice if there were a "fine mode"
setting for the SHIFT control.

I can live with both of these issues, but fixing them would
make this rig absolutely perfect for RTTY, at least for me.

Dave Hachadorian, K6LL
Yuma, AZ


- Original Message -
From: "Lee Buller" 
To: "Elecraft Reflector" 
Sent: Monday, January 05, 2009 2:56 PM
Subject: [Elecraft] K3: The ARRL RTTY Round UP



Ladies and Gents

I just about cleared a thousand Qs this weekend in the RU in
only 17 hours of on-the-air time. The K3 was spectacular in
performance. The RX is magnificent and copied signals that I
could not hear out of the speaker but printed on the screen.
This happened many times. From Kansas, I did get to work
some deep Europeans and even Israel called me. I did not
hear any Russian stations at all. The DX was weak but
workable. Magnificent RX. The TX was healthing and robust. I
was running my amp so I was only running about 60 watts or
less. The TX stayed cool and stable.

The only issue I noticed was that between Dual PB on and
off...the power would drop about 200 watts. No big deal, but
interesting phenomonon. With the Dual PB on...the power
would drop...with it off...the power would return to normal.
Wayne and Eric already know about this issue.

Thanks to all who worked me. Fun contest.

Lee - K0WA


In our day and age it seems that Common Sense is in short
supply.  If you don't have any Common Sense - get some
Common Sense and use it.  If you can't find any Common
Sense, ask for help from somebody who has some Common Sense.
Is Common Sense divine?


--- 
-

Re: [Elecraft] K3: listening to both rcvrs

[Mike Cox]

I think the questions regarding addition of noise from one Rx to the 
other Rx are interesting but not entirely relevant  to my own use of the 
dual receivers for split frequency DXing.


Here's the way I normally deal with a split frequency pileup (using a CW 
pileup as an example). Remember that myself and numerous others copy 
much better when the signal is coming in BOTH ears (sounds like it's in 
the middle of the head) as opposed to only ONE ear. We'll say the DX has 
split a couple of KHz up the band and the pileup is several KHz wide. My 
main Rx is on the DX and I'm in the split mode with the SUB Rx ON (I 
will transmit on the sub Rx freq). The main Rx is set very narrow 
(usually 100 - 300 Hz wide). The sub Rx is set about a KHz or more wide 
so I can hear a greater swath of pileup signals and listen for the 
station the DX is currently working. Here's how I run the audio with the 
Orion or Kenwood (using headphones):


Left Ear: Main Rx ONLY (DX station only, NO added noise from the sub Rx)
Right Ear: Main + Sub Rx (combine the two in phase) This is also my Tx 
frequency.


Here is what my brain perceives: The DX is in the middle of my head and 
is easy to decipher (much easier for me than if the DX was only out to 
my left). The pileup and most of the noise are outside of my head, 
somewhere to my right side. It becomes a simple matter to pay attention 
to the right side pileup and tune for a responding signal while the DX 
station is not transmitting. Even though the pileup may not quit calling 
while the DX station sends, when the DX station is on, it is very easy 
to ignore the noise out to the right side and concentrate on what the DX 
station is sending in the "middle" of my head. Even with the weakest DX 
signals, I seldom ever turn off the sub Rx. The noise is simply ignored 
in my head at the appropriate times. When scanning the pileup for the 
"workee" on the right side, it is not necessary to achieve a solid copy 
but only to recognize that magic "599 TU" report. Then you know you are 
nearly on the spot the DX station is currently monitoring. The 
additional noise added into the right side from the main Rx is not 
really an issue and, in fact, it only becomes harder to copy stations in 
the pileup during the DX stations' transmissions. That's not really a 
bad thing since the DX station achieves a "perception priority" over the 
bedlam of the pileup. The DX is in BOTH ears. The noise is only in ONE 
ear. If the DX is in the left ear only, it only achieves, at best, 
parity with the pileup in the right. By the way, the bedlam of the 
pileup is usually many dB louder than the typical band noise so the 
discussions of additive noise floors are really about a miner annoyance 
compared to hundreds of transmitters pounding out their calls in the 
pileup. Depending on the loudness of the pileup and how well your brain 
has adapted to this system, you simply adjust the sub Rx volume so that 
it doesn't detract from the copy of the DX station. That way, for me, 
the DX station always achieves the magic priority over the pileup in my 
organic signal decoder.


I currently run the K3 with stereo speakers. I set in front of the left 
speaker and place the right speaker at my far right. For me, it works 
better for copying the DX than using the headphones with the DX only on 
the left side. It's the simplest of audio mixers. An SSB pileup is 
handled the similarly except the passband of the sub Rx is not opened up 
beyond normal voice response. I surely would like to use the "cans" so I 
can get rid of the computer and fan noise!


Anyway, that's the way my brain does it best.

Good DX,
Mike, AB9V



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Re: [Elecraft] K3: listening to both rcvrs

[Mike Cox]

From my perspective of 20+ years of doing this, I stand firmly by my 
statement that having the weak, noisy DX in the "middle of my head" 
(both ears) makes it easier for me to copy in conjunction with the 
pileup noise than copying with the DX "out to the left" with the pileup 
noise to the right. Thats my observation. It works best FOR ME! It 
doesn't mean others are the same. Remember that the brain is the 
ultimate mixer and filter and mine adapts to pulling out the weak DX 
from the noise best when it's in the "middle of my head". Yes, turning 
off the sub to copy the main is a better situation for copying the DX. 
That's not the issue. */I'm trying to simultaneously listen to the 
pileup too! /* This works for me! your theories are fine for the physics 
of electronics up to the headphones. It's what happens after the sound 
energy goes into the ears that is my issue. My brain halves are still 
connected to each other and separate ear feeds probably recombine in the 
brain differently for different people! I'm only stating how I, as a 
long time dual receiver user, can best use the second receiver in the 
split weak DX pile-up situation.. Kenwood, TenTec and apparently Yeasu 
realize this too.



Mike
DXCC #1Honor Roll from a noisy city lot


Joe Subich, W4TV wrote:
Jim, 

Unless one is using diversity with phase locked signals, adding 
the uncorrelated noise from one receiver to the signal from the 
other receiver reduces the overall s/n.  While you may think my 
use of the term "pollution" is unnecessarily negative, it is an 
accurate description.  


Assuming equal volume settings and equal bandwidths in the two
receivers, the S/N will degrade by 6 dB (twice the noise voltage). 
If one is listening to a desired DX station with a low noise 
antenna and the pile-up with a wider filter and a noisy transmit 
antenna, the S/N will be degraded even more.  

The K3 receivers are better isolated that other "dual receiver" 
transceivers.  It would be a shame to degrade S/N by adding a 
mix control when it is relatively easy to do so externally or 
those who don't mind the hit in S/N. 

73, 

   ... Joe, W4TV 
 




  

-Original Message-
From: [EMAIL PROTECTED] 
[mailto:[EMAIL PROTECTED] On Behalf Of Dr. 
James C. Garland

Sent: Sunday, November 16, 2008 12:19 PM
To: elecraft@mailman.qth.net
Subject: RE: [Elecraft] K3: listening to both rcvrs


Joe,
Your comment strikes me as unnecessarily negative. (Pollute? 
Crosstalk?)  I thought Fred's suggestion, coming as it does 
from a very experienced CW contester, makes a lot of sense.


73,

Jim W8ZR



-Original Message-
From: [EMAIL PROTECTED] [mailto:elecraft- 
[EMAIL PROTECTED] On Behalf Of Joe Subich, W4TV

Sent: Sunday, November 16, 2008 10:09 AM
To: 'cloud runner'; 'Elecraft Reflector'
Subject: RE: [Elecraft] K3: listening to both rcvrs


If you must pollute the audio from one receiver with audio from the 
other receiver, add a 5 to 10K pot between the tip and the ring of 
your headphones and adjust it for the level of pollution you need.


There is no need for Wayne (or probably Lyle) to design 
  
crosstalk into 


the DSP process.

73,

   ... Joe, W4TV




  

-Original Message-
From: [EMAIL PROTECTED] 
[mailto:[EMAIL PROTECTED] On Behalf Of 


cloud runner


Sent: Sunday, November 16, 2008 11:03 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3: listening to both rcvrs


for what it may be worth...

For my pair-of-K2's in SO2R, I have routed the audio in 

such a way 

that I have a balance control with the audio from the two 

radios.  I 

call it a mixing control.  I find that "optimum" is achieved when 
the full strength audio is in one ear, and that same audio is 
present, but weak in the other ear.  I reason that when the audio 
goes to one ear only, the content must get to the other 

hemisphere 

of the brain within brain circuitry.  When it is routed to both 
ears, now both hemispheres get the information for 

interpretation at 


the same time.  Making it strong in one ear and weak in the
other, reversed for the other channel, lets me know which
rcvr I am hearing, while brain interpretation is at full speed.

and so, Wayne...

I think that there must be a firmware way either by routing to a 
panel pot, or probably more simply in a menu, by which 

the operator 

can select either complete channel isolation, or both channels to 
both ears, but with one ear X DB down from the other.  (I 

can't say 

how much down is best,but I find that it is enough when I 

can barely 

notice it.  All of a sudden copy is MUCH easier).  Give 

it a thought 

because of the above, I, at least, am quite convinced 


after a lot of


usage with a pair of K2's in SO2R, that is a much better
arrangement for copying CW from the two channels.

with much appreciation for this fine radio,

73,  Fd - KT5X

Re: [Elecraft] K3: listening to both rcvrs

[Mike Cox]

Mixing BOTH receivers into BOTH ears is not the same and is simply 
summing the noise, effectively erasing the advantage of the DX operating 
a split frequency!


I can't speak for SO2R contest operation but I've been using a dual 
receiver setup for DXing for many years. I initially used separate 
receivers and an external audio mixer, replaced by a TS-950SDX, followed 
by an Orion and now the K3. The 950 and Orion both allow a mix of the 
main receiver in BOTH ears while maintaining the sub ONLY in the right 
ear. I USED THEM THIS WAY!


My mental image of this setup is of having the DX station in the "middle 
of my head" while the pileup remains "outside of my head" (only on the 
right side). Having the bedlam of the pileup "outside of my head" makes 
it easier to ignore this "noise" at the times when I am concentrating on 
the DX station's transmissions. There is much less need to actually 
decipher signals in the pileup but only to recognize that you are 
listening to the station that the DX is currently working as you are 
hunting for his current QSX frequency. I found this feature to greatly 
improve my ability to decipher a weak DX station while simultaneously 
following the bedlam of the (split frequency) pileup. As I recall, the 
950 also allowed the main to mix at a reduced level into the other ear 
which didn't "center" the primary receiver in my head but still enhanced 
the ease of copy.


Using the K3 is great since the second Rx is the same quality as the 
primary Rx, unlike my previous two radios. Their secondary receivers 
were inferior to their main and prone to numerous distortion products 
which made the pileup bedlam even worse. Since getting the K3 second Rx, 
I've been trying to retrain my brain to copy the DX station by using 
just my left ear (signal outside of my head) but it's obviously not as 
easy as when the copy signal is in the "middle of my head". If code 
space permits, it would be really great if the K3 did this function 
internally as a user option. Obviously, Kenwood and TenTec also found 
this feature desirable. Otherwise, I will probably just build an 
external mixer box with headphone amp so I can get the primary signal 
centered in my head again.


Thanks to Elecraft for an already superb radio!

...Mike

Joe Subich, W4TV wrote:
If you must pollute the audio from one receiver with audio 
from the other receiver, add a 5 to 10K pot between the tip 
and the ring of your headphones and adjust it for the level 
of pollution you need.  

There is no need for Wayne (or probably Lyle) to design 
crosstalk into the DSP process. 

73, 

   ... Joe, W4TV 
 




  

-Original Message-
From: [EMAIL PROTECTED] 
[mailto:[EMAIL PROTECTED] On Behalf Of cloud runner

Sent: Sunday, November 16, 2008 11:03 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3: listening to both rcvrs


for what it may be worth...

For my pair-of-K2's in SO2R, I have routed the audio in such 
a way that I have a balance control with the audio from the 
two radios.  I call it a mixing control.  I find that 
"optimum" is achieved when the full strength audio is in one 
ear, and that same audio is present, but weak in the other 
ear.  I reason that when the audio goes to one ear only, the 
content must get to the other hemisphere of the brain within 
brain circuitry.  When it is routed to both ears, now both 
hemispheres get the information for interpretation at the 
same time.  Making it strong in one ear and weak in the 
other, reversed for the other channel, lets me know which 
rcvr I am hearing, while brain interpretation is at full speed.


and so, Wayne...

I think that there must be a firmware way either by routing 
to a panel pot, or probably more simply in a menu, by which 
the operator can select either complete channel isolation, or 
both channels to both ears, but with one ear X DB down from 
the other.  (I can't say how much down is best,but I find 
that it is enough when I can barely notice it.  All of a 
sudden copy is MUCH easier).  Give it a thought because of 
the above, I, at least, am quite convinced after a lot of 
usage with a pair of K2's in SO2R, that is a much better 
arrangement for copying CW from the two channels.


with much appreciation for this fine radio,

73,  Fd - KT5X

K2 # 0700
K3 # 0144




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Re: [Elecraft] Software Upgrades

[Mike Cox]

Having already survived the Ten-Tec Orion I firmware and hardware 
upgrade fiasco, I must admit that my experiences with the Elecraft 
firmware migration has been a real pleasure. I eagerly download each new 
beta version as soon as I know it's available. I have never regressed to 
a previous edition. This was not the case with my Orion I. The ease of 
loading a new version of the K3 firmware is an added plus over the Orion 
(power on - hold the proper buttons - hold tongue just right while 
crossing fingers). If there is some substantive issue with a new K3 
version, a corrected version appears within hours (not weeks or months 
as was the case with my Orion I). Also, the actual programmers of the K3 
are accessible and responsive. I never did succeed in contacting an 
Orion I programmer. Waiting over a year for Orion firmware that did not 
occasionally crash like Windows 3.1 was frustrating! Considering the big 
3 japanese manufacturers; if it doesn't work to your expectations, 
simply wait for a subsequent model introduction and see if that's better.


If one is not comfortable with frequent K3 firmware upgrades, simply 
ignore the "beta" versions. New "production" versions are not all that 
frequent.


If one enjoys playing with new features and functions as soon as the 
guys in Aptos make them available, then dive into the "betas". It's an 
opportunity to participate in the engineering process! Hey, these guys 
LISTEN to our feedback. I'm having a ball participating in the evolution 
of this fine radio. I think they're doing it in a most acceptable fashion.


BOB PHILBROOK wrote:
After reading countless reflector comments about firmware upgrades and releases, it appears to me that in many instances such so called upgrades are two steps forward and one in reverse.  


You know the drill, fix this problem, add a new feature, and then find that 
something that worked in previous versions does not function as expected and 
now demands a fix and another firmware version.

Personally, I would like to see fewer firmware releases and more time spent vetting firmware before it is released.  Firmware upgrades should be two steps forward -- period! 


The rush to add new features and fix bugs in firmware appears to me to be too 
rushed to be efficient and effective.  Tell me fellows, why the rush?

Bob, K9PAG
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Re: [Elecraft] RE: Band Button

[Mike Cox]

I rather miss sliding the honeycomb wound coils over the wooden dowels 
and landing the leads in Fahnestock clips followed by plugging in a new 
crystal to change bands. It was made more interesting by forgetting to 
turn off the HV but was a great way to wake up in the morning.


By the way (while robbing threads) why does the K3 use a threaded post 
and knurled nut to fasten the ground wire when it's obvious that a 
Fahnestock clip could do the same job much quicker without even using a 
thumb? :-)



Dave Agsten wrote:

Wow - never thought anything as simple as a band select button would cause such 
commotion. Back when there were rotary bandswitches you had to go through 40 to 
get from 80 to 20. How did we ever manage that? Such silly stuff.

73,
Dave N8AG

PS - wonder which button is next on the list? Oh, that's right, the Mode 
button.


  
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