Re: [Elecraft] K3 - XV144 operation

2008-09-23 Thread David Ferrington, M0XDF

but then you'd be turning the VFOA knob on the other K3 :-)
73 de M0XDF, K3 #174
--  
Hofstadter's Law: The time and effort required to complete a project are
always more than you expect, even when you take into account  
Hofstadter's

Law.

On 22 Sep 2008, at 20:32, N2TK wrote:
Please ignore my question. Got my K3's mixed up. I hooked up the  
XV144 to
the K3 that did not have FM. I guess this is a reason to have K3's  
setup

with the same options.


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[Elecraft] K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread GW0ETF

Been wondering just how the TX Gain calibration works. To quote from the
manual - 

The gain constant is updated whenever the TUNE function is activated on a
given
band at one of three specific power levels: 5.0W, 50W, and 1.00 milliwatt.

So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the
(LP)Tx gain constant be updated while feeding into an unspecified load. The
described procedure requires the use of a dummy load to set the gain
constant; if the load isn't 50 ohm resistive will the constant be set to
some anomalous figure which may not be updated when the atu eventually
presents (hopefully) 50R to the K3??

Just curious

Stewart Rolfe, GW0ETF (K3 #145 with latest everything)
-- 
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Re: [Elecraft] K3 AGC is better now

2008-09-23 Thread Val



Can anyone recommend the best menu setting for max discrimination among 
many callers at same time?


Start with Config menu: AGC SLP= 005 and then experiment with
different values.  The lower the value (down to 0), the louder the
stronger signals will be.  If you go too low, you risk overdriving
your ear drums.


I found that we can go down (even to 0) without risking the ears, if we set 
high threshold (AGC THR up to 8). This allows us to crank down AF gain 
control (9 o'clock here for 200 Hz BW).


73, Val LZ1VB 


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[Elecraft] K3 Output Power Unstable

2008-09-23 Thread Roy Morris
I thought this was corrected in a previous firmware upgrade.  This apparently 
is not the case.  Output power still varies in the SSB mode by as much as 50%.  
This shows up on the K3 ALC display and the power output display.  Roy Morris  
W4WFB
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Re: [Elecraft] K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread AD6XY

I hope not - though it could explain a few things. Surely the radio needs to
be in TECH mode. Tuning up an ATU would reset all the calibrations
otherwise. My amplifier needs about 50W of drive and my transverter about
1mW.

Mike


GW0ETF wrote:
 
 Been wondering just how the TX Gain calibration works. To quote from the
 manual - 
 
 The gain constant is updated whenever the TUNE function is activated on a
 given
 band at one of three specific power levels: 5.0W, 50W, and 1.00
 milliwatt.
 
 So if I'm adjusting my external ATU by TUNE(ing) at say 5watts, will the
 (LP)Tx gain constant be updated while feeding into an unspecified load.
 The described procedure requires the use of a dummy load to set the gain
 constant; if the load isn't 50 ohm resistive will the constant be set to
 some anomalous figure which may not be updated when the atu eventually
 presents (hopefully) 50R to the K3??
 
 Just curious
 
 Stewart Rolfe, GW0ETF (K3 #145 with latest everything)
 

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RE: RES: RES: [Elecraft] ROOFING FILTERS CW PY5EG

2008-09-23 Thread py5eg
Hi Don

I deactivated the KXV3, power of, and then re-activate and still ERR XVR.
Can you help me on that?
Thanks in advance
Oms 

-Original Message-
From: Don Wilhelm [mailto:[EMAIL PROTECTED] 
Sent: Sunday, September 21, 2008 10:37 PM
To: py5eg
Subject: Re: RES: RES: [Elecraft] ROOFING FILTERS CW PY5EG

Oms,

ERR XV3 is associated with the KXV3 option, and is not related to the filters.
The manual indicates that one should de-install the KXV3 option.
You could try deactivating it in the menu, power off, and then re-activate it 
before you actually remove the option.

73,
Don W3FPR

py5eg wrote:
 Hi Don
 Thanks again
 It is showing an ERR XV3
 I done the set up via the K3 utility
 I still donĀ“t know what I done wrong
 Sorry to keep you working
 73
 Oms PY5EG


 -Mensagem original-
 De: Don Wilhelm [mailto:[EMAIL PROTECTED] Enviada em: Sunday, 
 September 21, 2008 9:55 PM
 Para: py5eg
 Cc: [EMAIL PROTECTED]; elecraft@mailman.qth.net
 Assunto: Re: RES: [Elecraft] ROOFING FILTERS CW PY5EG

 Oms,

 You may either use the K3 Utility program to set up your transmit 
 filter or you may use the K3 Config: Menu.  The FLTX menu entry must 
 be set for each mode.

 73,
 Don W3FPR

 py5eg wrote:
   
 Hi Don
 Thanks for being so fast.
 Where can I pre-set the CW filter?
 I have the 2,7 Khz, 1,8 , 1,0 and 0,4
 73
 Oms

 -Mensagem original-
 De: Don Wilhelm [mailto:[EMAIL PROTECTED] Enviada em: Sunday, 
 September 21, 2008 9:14 PM
 Para: py5eg
 Cc: elecraft@mailman.qth.net
 Assunto: Re: [Elecraft] ROOFING FILTERS CW PY5EG

 What is the filter that you have configured for CW transmit?  It must 
 be

 the 2.7 or 2.8 kHz filter.

 73,
 Don W3FPR

 py5eg wrote:
   
 
 Hi Folks:

 I installed, 2,1  1,8  1.0  and 0,4 roofing filters on my K3.

 It is working perfectly on SSB, but it is no working in the other
 
   
 modes
   
 
 i.e CW.

 Did I make something wrong?

 Oms PY5EG

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Re: [Elecraft] A Bad Thing Happened To My K2

2008-09-23 Thread Don Wilhelm

Mark,

I am puzzled since you say it transmits on 40 meters, but does not 
receive - and that it receives well on other bands.

There is precious little in the K2 that would create that situation.

What do you have set for 40 meters that is different from other bands?  
Preamp on/off? Attenuator on/off? RANT on/off?


Do you have the K160RX installed?  If so, connect your antenna to the 
receive antenna jack and see if the receiver comes to life.


Now if you could not transmit nor receive on 40 meters, I would point to 
the relay in the 40 meter lowpass filter, so check 40 meter transmit 
again - and check all bands for the maximum power produced.  Sometimes a 
transmit problem will not be revealed by transmitting at a low power 
level, but will reveal itself when the power control is cranked to maximum.


Do you have the KAT2 installed?  If so, try removing the KAT2 and see if 
you can receive 40 meters from the base K2 antenna jack.


Other than those things, I am out of ideas.

73,
Don W3FPR

Mark Saunders, KJ7BS wrote:

This evening I had a guest ham in the shack who was curious about my K2 and
asked if we could hook it up.  So we did.  I pointed out which 12v power
strip, power cord, and antenna to use.  While I was getting the proper
computer interface cables hooded up, my guest connected the radio to the
power and switched it on.  I heard a loud snap and immediately looked in the
direction of the K2 operating position.  My guest had a strange look on his
face and I asked what happened.  There was a spark from the outside of the
antenna connector on the back of the K2 to the center connector of the coax.

 


That can't happen, right?  Wrong.

 


After shutting down the power supply and inspecting things, I discovered my
guest had wired the power backwards.  Fortunately the reverse polarity
circuitry protected the radio and internal battery.  The radio was operating
from the battery, that's why it came on.  I still can't understand where the
spark came from.  However, I now have virtually NO receive on 40m, that's
where the radio was when the spark occurred.  I have transmit and receive on
all other bands and transmit on 40m, just no receive on 40m.

 


That spark killed something dealing with 40m receive.  It is so bad I can't
even hear the local oscillator around 7000 KHz with the pre-amp on.  There
is no CW or SSB receive.
  


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[Elecraft] [K3] Recording a qso with the K3

2008-09-23 Thread Peter

Hi

I like to make a complete record of a qso.
With the line-out at the K3 connected to the sound card I can record the 
rx part.

Is it possible to echo the tx audio into line out to record the tx part?

Peter
PC2A
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Re: [Elecraft] K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Paul Christensen

Been wondering just how the TX Gain calibration works. To quote from the
manual - The gain constant is updated whenever the TUNE function is 
activated on a
given band at one of three specific power levels: 5.0W, 50W, and 1.00 
milliwatt.


I'm surprised there have not been any comments on this matter as it's an 
excellent question.


To Stewart's point, does the gain of the K3 recalibrate every time TUNE is 
depressed at one of the three stated power levels when the CONFIG menu is 
set as instructed in the alignment section of the owner's manual for PWR 
Set = nor?


Does the K3's display need to reflect PWR Set simultaneously for the 
calibration to occur, or can we exit from the CONFIG menu prior to the gain 
alignment so long as PWR SET - nor?


Finally, what prevents the re-loading of new gain data if as Stewart 
suggest, he sets the K3 power to exactly 5 watts or 50-watts and depresses 
TUNE for external ATU tuning purposes?  Should he instead stay away from 
those two values and use perhaps 49 or 51 watts?


I am running into the same issue as my K3's 10M output power appears to be 
substantially less (~ 75W) than on lower HF bands.  I would like to ensure 
that I have calibrated gain for 10M and 6M and know that the routine was 
invoked as expected.


Paul, W9AC


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RE: [Elecraft] [K3] Recording a qso with the K3

2008-09-23 Thread Darwin, Keith
A poor man's way of doing that would be to take a feed from the speaker
or headphone output.  That will have both RX and TX parts.  Just don't
play with the volume control during recording :-)

73!

- Keith N1AS -
- K3 711 - 

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

I like to make a complete record of a qso.
With the line-out at the K3 connected to the sound card I can record the
rx part.
Is it possible to echo the tx audio into line out to record the tx
part?

Peter
PC2A
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[Elecraft] K3 and MARS

2008-09-23 Thread Michael Fox (K5MEF)
Is anyone using the K3 for MARS work?

If so, can you contact me off-list to provide more info?

I'm interested in getting involved with MARS.  But the application simply
asks if you're able to transmit/receive on MARS frequencies without
specifying what those frequencies are.  So, I'd like to know what
frequencies I need to worry about and what, if any, modifications are needed
to the K3 to make it able to participate in MARS work.

Thanks in advance.

73,
Michael - K5MEF
 


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[Elecraft] SDR-IQ + K2

2008-09-23 Thread Chuck
Mike wrote:
+++
I was wondering if anyone on the list is using the
SDR-IQ software
 defined radio and what their thoughts are on it.
 
Can CW Skimmer be used with it? Does it have to run
through my K2? So
 and so forth. I don't use cw skimmer but I do contest
a lot and would
 like to know how much woule it really help.
 

Picked up a SDR-IQ some time ago for use as a general
coverage SW receiver. The SDR-IQ is the size of a pack
of playing cards. The packaged control software,
SpectraVue, is highly capable and works beautifully
with a plain vanilla, 5 year old Dell laptop (XP
Pro)through one of the USB ports and using the on
board soundcard. Highly recommend the SDR-IQ for on
the go HF, 500 hz to 30 mhz, all mode SWLing (AM, USB,
LSB, DSB, CW). Comparable in performance to a R-71A.

Several months ago added a Cliffton Laboratories
Z1 IF buffer-amplifier / tap to the K2 (w/KIO2
RS-232 interface)and frequently use the SDR-IQ as a
panoramic spectrum monitor. This is an easy
modification and Cliffton Labs provides outstanding
support (also highly recommend).

Typically, use the SDR-IQ + K2 combination to monitor
about 150 khz of spectrum for general activity. For
example, in the evenings, generally observe 30 to 40
cw sigs in the segment from 7.0 to 7.15 mhz)-- 4 or 5
closely spaced is a good tip that dx is present.  A
mouse click at that location on the laptop screen will
take the K2 instantly there to check what is going on.
 More often, use the SDR-IQ to simply check for a
clear space to CQ or to find an interesting QSO to
listen in on (the laptop screen resolution is plenty
adequate to visually decode cw if desired). In
summary, the SDR-IQ and K2 (with Z1) work and
track very well together.

Have not used cw skimmer but, could. Not of interest
for contesting as this technology, imho, is assisted
whereas just me and the radio (plus laptop with no
spotting clusters attached)is preferred for this
activity. This month's issue of the NCJ has several
very good articles on SDR-IQ setup and utilization.
73, Chuck AF4PP   




  
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Re: [Elecraft] [K3] Recording a qso with the K3

2008-09-23 Thread Stewart Baker
Not at present. I hope that this one is on the list.

73
Stewart G3RXQ
On Tue, 23 Sep 2008 14:49:14 +, Peter wrote:
 Hi

 I like to make a complete record of a qso.
 With the line-out at the K3 connected to the sound card I can
record the
 rx part.
 Is it possible to echo the tx audio into line out to record
the tx part?

 Peter
 PC2A
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Re: [Elecraft] [K3] Recording a qso with the K3

2008-09-23 Thread Lyle Johnson

Not at present. I hope that this one is on the list.


Yes, set LINE OUT =PHONES.

73,

Lyle KK7P

Yes, I know it follows the headphone level, not a fixed level.  Buit 
you then record what you hear, a syou hear, set as you se tit, and Tx as 
well as Rx.


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[Elecraft] K1: to the rescue

2008-09-23 Thread DOUGLAS ZWIEBEL
http://www.arrl.org/news/stories/2008/09/23/10348/?nc=1

Pretty neat.

Doug
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Re: [Elecraft] why buy, when you can build it yourself?

2008-09-23 Thread Stephen Prior
David

This video had me absolutely spellbound.  Thanks for sharing it!

73 Stephen G4SJP


On 22/09/2008 07:39, David Reid [EMAIL PROTECTED] wrote:

 
 http://www.dailymotion.com/video/x3wrzo_fabrication-dune-lampe-triode_tech
 
 enjoy this video...
 
 73/72 de PA3HBB/G0BZF/PB6X
 
 
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[Elecraft] K3 power cord

2008-09-23 Thread wsm
Hello
I'm beginning to prepare for the assembly of
my K3 when it arrives in a few days.
Does Elecraft supply a power cord with it? I
can't find anything about that in the assembly
manual or the operating manual.
Scott
N5SM

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Re: [Elecraft] K3 power cord

2008-09-23 Thread Eric Swartz - WA6HHQ Elecraft

Hi Scott,

Yes, we do.

73, Eric  WA6HHQ

_..._

[EMAIL PROTECTED] wrote:

Hello
I'm beginning to prepare for the assembly of
my K3 when it arrives in a few days.
Does Elecraft supply a power cord with it? I
can't find anything about that in the assembly
manual or the operating manual.
Scott
N5SM

  

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[Elecraft] OT freeby

2008-09-23 Thread Jeremiah McCarthy
I have 2 old antenna rotators that I want to dispose of, one is a CDR and the 
other is a Ham-M...These are 70's vintage but they work perfectly...They are 
free to anyone who can come to my QTH and pick them up, first come, first 
served...I cannot get out to mail them, therefore they will not be posted on 
e-bay...I also have a 10 foot Rohn tower with roof mounting kit and bottom 
mounted rotator plate. ..It is a little rusty but sound and salvageable with a 
little Rustoleum...

I am located in Hicksville, NY which is in the center of Nassau County on Long 
Island...Contact me direct and off the reflector...I do not monitor the 
reflector...

Jerry McCarthy, wa2dkg
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[Elecraft] K3 SSB Power Control and ALC Metering

2008-09-23 Thread wayne burdick
There's been some recent discussion of how to properly set up the K3 in 
SSB modes. I meant to respond sooner but was out of town for several 
days.


MIC GAIN SETTING:  Adjust MIC gain for an ALC meter peak at around 5 to 
7 bars during normal speech (rev. D owner's manual, page 28). This 
applies even to TX TEST mode, meaning you can set it off-air. This 
indication does not mean that you're hitting the ALC really hard. 
When you get to around 5 bars, you'll be tickling the DSP's ALC. More 
on this below.


ALC METERING:  The K3's ALC meter is a bar graph, not an analog meter, 
and we felt that 5 bars would provide the right granularity at the 
target ALC level. The 5th bar of the ALC scale is heavier than the 
others, serving as a reminder of the this level.


ALC DESIGN GOAL:  The K3 was designed to minimize transmit splatter and 
other effects that plague some rigs. To achieve this, we apply all ALC 
*before* the crystal filter, and minimize the application of ALC in 
general. The levels have been carefully calibrated to that 5-to-7-bar 
level mentioned above. The result is that the crystal and DSP filters 
remove the types of artifacts that in many other rigs end up as 
transmitted wideband noise or clicks. I believe this is why we continue 
to hear excellent reports from K3 users regarding their on-the-air SSB 
signals. (We've also heard, from some experts in the subject, that the 
K3's compression is among the most effective they've ever measured.)


PER-BAND POWER CONTROL: With some vocalizations, speech energy may 
build up within a narrow crystal filter to produce a slight peaking 
effect. Because of this, the user must set the K3's power output level 
such that it peaks at or below the safe level for any external 
amplifier under all speech conditions. To facilitate this, you can use 
per-band power control (refer to the PWR SET configuration menu entry). 
We have many customers using this method. It compensates for per-band 
gain variation in the external amp or the K3 itself, again reducing the 
need for ALC. For example, all crystal filters have a small amount of 
ripple (typ. +/- 0.5 to 1.0 dB) that can result in a slight difference 
in average power output between LSB and USB with some voice 
characteristics. But since you typically use only one of the two 
sidebands on a given ham band, per-band power control can conveniently 
compensate for small variations.


TX GAIN COMPENSATION FOR VOICE MODES (TXG VCE): If you find that your 
speech peaks are routinely above the desired level (i.e., higher than 
CW power output using TUNE), you can adjust the TXG VCE menu parameter 
downward in 0.5 dB steps. Conversely, if your normal speech 
characteristics result in lower power output compared to CW TUNE, you 
can increase TXG VCE above the 0.0 dB level.


I'll be happy to answer any further questions. Our goal is to improve 
the manual to make the above as clear as possible.


73,
Wayne
N6KR

* * *

OK?

W




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[Elecraft] MCU LD

2008-09-23 Thread Eric

   OK,
   I  tried  to  load  new  firmware  to the K3, not using the USB-serial
   cable, but thru the micro keyer interface which is normally connected
   to  the  K3.  At first my PC 'sees' the K3 but during upload something
   went  wrong  and  now  I have a K3 displaying MCU LD and a blinking TX
   LED.
   Anyone has a lead here?
   vy 73 Eric PA3CEV
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RE: [Elecraft] MCU LD

2008-09-23 Thread Dick Dievendorff
Don't attempt to load firmware into your K3 through a microHAM device.  Use
a USB to Serial Adapter or RS-232 cable that sends exactly what is sent by
the K3 Utility.

Some users have sometimes succeeded by changing the microHAM Router to a
radio type none before loading K3 firmware, but sometimes (depending on
the microHAM router version) that doesn't work either.


Dick, K6KR


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Eric
Sent: Tuesday, September 23, 2008 1:12 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] MCU LD


   OK,
   I  tried  to  load  new  firmware  to the K3, not using the USB-serial
   cable, but thru the micro keyer interface which is normally connected
   to  the  K3.  At first my PC 'sees' the K3 but during upload something
   went  wrong  and  now  I have a K3 displaying MCU LD and a blinking TX
   LED.
   Anyone has a lead here?
   vy 73 Eric PA3CEV
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RE: [Elecraft] K3 power cord

2008-09-23 Thread Joe Subich, W4TV

A factory assembled power cable is not included with the 
kit version of the K3.  Unless you order the factory assembled 
power cable separately, the kit includes the parts for the user 
to roll your own power cable.  


 
 [EMAIL PROTECTED] wrote:
  Hello
  I'm beginning to prepare for the assembly of
  my K3 when it arrives in a few days.
  Does Elecraft supply a power cord with it? I
  can't find anything about that in the assembly
  manual or the operating manual.
  Scott
  N5SM
 


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RE: [Elecraft] MCU LD

2008-09-23 Thread Joe Subich, W4TV

From the microKEYER Manual: 

 If your radio includes upgradeable firmware,
DO NOT perform any upgrade through microKEYER.

That said, with any microHAM interface you must set the radio 
type to None (Ports | CAT | Set), check the Disable router 
queries box, check both Forward autoinformation to CAT port 
boxes, and set the 2nd CAT port to None before attempting 
an firmware update.  

After all of that you still need to keep a real serial port 
or a generic USB to RS-232 adapter for emergencies.  
 





 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Eric
 Sent: Tuesday, September 23, 2008 4:12 PM
 To: Elecraft@mailman.qth.net
 Subject: [Elecraft] MCU LD
 
 
 
OK,
I  tried  to  load  new  firmware  to the K3, not using 
 the USB-serial
cable, but thru the micro keyer interface which is 
 normally connected
to  the  K3.  At first my PC 'sees' the K3 but during 
 upload something
went  wrong  and  now  I have a K3 displaying MCU LD and a 
 blinking TX
LED.
Anyone has a lead here?
vy 73 Eric PA3CEV 


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[Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread wayne burdick

Hi Paul,

Been wondering just how the TX Gain calibration works. To quote from 
the
manual - The gain constant is updated whenever the TUNE function is 
activated on a given band at one of three specific power levels: 
5.0W, 50W, and 1.00 milliwatt.


To Stewart's point, does the gain of the K3 recalibrate every time 
TUNE is depressed at one of the three stated power levels... ?


Yes. It doesn't matter whether you select one of these power levels 
manually using the PWR knob, or using the TUN PWR menu entry. It will 
always recalibrate the gain constant during TUNE if you happen to be at 
one of these power levels.


However, it will only do this if the SWR is 2.0:1 or less. This 
provides plenty of safety margin.


Finally, what prevents the re-loading of new gain data if as Stewart 
suggest, he sets the K3 power to exactly 5 watts or 50-watts and 
depresses TUNE for external ATU tuning purposes?  Should he instead 
stay away from those two values and use perhaps 49 or 51 watts?


No need to do this. The fact that it recalibrates every time you do 
TUNE at one of these levels is not a problem. It just updates the 
EEPROM constant if it has changed.


The TX gain constant is only there to compensate for small per-band 
gain variation within the K3's transmitter. If you've done the power 
calibration, then you can set PWR and be fairly close to the target 
level on each band. Thus the MCU won't have to adjust power very much 
in real time. In CW mode, this means we can apply our keying waveform 
open-loop, preserving the target raised-cosine shape at all power 
levels. In voice modes it helps achieve our goal of applying a minimum 
of ALC.


73,
Wayne
N6KR


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[Elecraft] K2 (gasp, a real K2 question) KPA100 idea

2008-09-23 Thread Jferg977
If I install an IC socket for U2 on my KPA100, will there be any adverse  
effects?  Don't ask why I would want to do this.  I would have to  admit to 
more 
than the usual stupidity.
 
73   AI4TOJohn Ferguson   M/V  Arcadian



**Looking for simple solutions to your real-life financial 
challenges?  Check out WalletPop for the latest news and information, tips and 
calculators.  (http://www.walletpop.com/?NCID=emlcntuswall0001)
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Re: [Elecraft] K2 (gasp, a real K2 question) KPA100 idea

2008-09-23 Thread Don Wilhelm

John,

As long as you use a good socket, there should be no adverse effects - 
all the signals operate near DC or very low frequencies.  Long term 
there is always more of a chance for oxidation between the chip leads 
and the socket than with a properly soldered-in chip, so you may want to 
re-seat the chip every 2 to 3 years just to wipe away any possible 
oxidation - it really depends on 'the air you breathe' how rapidly 
oxidation can develop - the coastal salt air seems to accelerate it.


73,
Don W3FPR

[EMAIL PROTECTED] wrote:
If I install an IC socket for U2 on my KPA100, will there be any adverse  
effects?  Don't ask why I would want to do this.  I would have to  admit to more 
than the usual stupidity.
 
73   AI4TOJohn Ferguson   M/V  Arcadian




**Looking for simple solutions to your real-life financial 
challenges?  Check out WalletPop for the latest news and information, tips and 
calculators.  (http://www.walletpop.com/?NCID=emlcntuswall0001)

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No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.169 / Virus Database: 270.7.0/1685 - Release Date: 9/22/2008 4:08 PM


  

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Re: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Jim Brown
Wayne,

I agree that the K3 can easily be made to transmit excellent audio, 
and I've been getting glowing reports on mine. I have a question. 
Exactly where in the signal chain is TXEQ with respect to Line In, 
Mic In, Comp/Lim, and  the sensing for VOX?  The absolute best place 
for TXEQ is after the point where the Mic In and Line In are summed 
to feed VOX sensing, with Comp/Lim following that. Is that the 
existing flow?  Are there different settings for Line In and Mic In? 
I would expect (and hope) that TXEQ is disabled for digital modes.

73,

Jim K9YC 


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Re: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Lyle Johnson
MIC|LINE|DVR are summed, The result is sent to the VOX detector as well 
as to the Tx Audio filter, which includes the TxEQ.


If the VOX detector were driven after the filtering, there would be 
delay.  This way, the filter delay acts to improve VOX attack time.


Tx EQ is a global control at this time.  It does not currently change 
with mode or source.  It is up to the operator of the radio to set it 
correctly for the mode and source of the moment.  This is one of the 
many items on the list for future enhancement.


73,

Lyle KK7P

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Re: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Jim Brown
On Tue, 23 Sep 2008 14:32:52 -0700, Lyle Johnson wrote:

This way, the filter delay acts to improve VOX attack time.

Yes, but it also prevents the TXEQ filter from removing LF trash 
(breathe pops, mic handling noise) that false triggers the VOX. And 
I'm having that problem. For the same reason, we want the comp/lim 
to be after the TXEQ. 

Have you considered (and are you using) feed forward sensing for 
comp/lim? This is widely used in pro audio. A few ms can do a lot to 
catch fast peaks, and it's analogous to what you're doing with the 
delay associated with EQ. 

Jim



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Re: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Lyle Johnson

Compression is after the filtering.  It is feed-forward.

VOX is before the filtering.

Tx EQ is inseparable from the rest of the Tx audio filtering/shaping.

73,

Lyle KK7P

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RE: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Joe Subich, W4TV

Wayne, 

 The TX gain constant is only there to compensate for small per-band 
 gain variation within the K3's transmitter. If you've done the power 
 calibration, then you can set PWR and be fairly close to the target 
 level on each band. Thus the MCU won't have to adjust power very much 
 in real time.

Does the K3 include a wattmeter slope adjustment?  If so, I can't 
find it.  

When the wattmeter is calibrated on 20 meters, I find a .75 to 1 dB 
slope between 1.8 and 50 MHz when compared with both my LP-100 and 
Bird wattmeters (power is about .25 dB high on 160 and a bit more 
than .5 dB low on 50 MHz).  The slope appears to be consistent at 
both 5 and 50 watts. 

If a slope adjustment is not available, it might be worthwhile to 
add the option to calibrate the wattmeter at two (160/10 or 160/6) 
or three points (160/20/6) for frequency compensation. 

73, 

   ... Joe, W4TV 
 




 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of wayne burdick
 Sent: Tuesday, September 23, 2008 4:42 PM
 To: Elecraft Reflector
 Subject: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?
 
 
 Hi Paul,
 
  Been wondering just how the TX Gain calibration works. To 
 quote from
  the
  manual - The gain constant is updated whenever the TUNE 
 function is 
  activated on a given band at one of three specific power levels: 
  5.0W, 50W, and 1.00 milliwatt.
 
  To Stewart's point, does the gain of the K3 recalibrate every time
  TUNE is depressed at one of the three stated power levels... ?
 
 Yes. It doesn't matter whether you select one of these power levels 
 manually using the PWR knob, or using the TUN PWR menu entry. It will 
 always recalibrate the gain constant during TUNE if you 
 happen to be at 
 one of these power levels.
 
 However, it will only do this if the SWR is 2.0:1 or less. This 
 provides plenty of safety margin.
 
  Finally, what prevents the re-loading of new gain data if as Stewart
  suggest, he sets the K3 power to exactly 5 watts or 50-watts and 
  depresses TUNE for external ATU tuning purposes?  Should he instead 
  stay away from those two values and use perhaps 49 or 51 watts?
 
 No need to do this. The fact that it recalibrates every time you do 
 TUNE at one of these levels is not a problem. It just updates the 
 EEPROM constant if it has changed.
 
 The TX gain constant is only there to compensate for small per-band 
 gain variation within the K3's transmitter. If you've done the power 
 calibration, then you can set PWR and be fairly close to the target 
 level on each band. Thus the MCU won't have to adjust power very much 
 in real time. In CW mode, this means we can apply our keying waveform 
 open-loop, preserving the target raised-cosine shape at all power 
 levels. In voice modes it helps achieve our goal of applying 
 a minimum 
 of ALC.
 
 73,
 Wayne
 N6KR
 


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Re: [Elecraft] MCU LD

2008-09-23 Thread Greg - AB7R
You need to set the radio selection in Router to none and I also turned off 
polling 
just in case.

Do that and then upload the firmware again with the utility.

-
73,
Greg - AB7R
Whidbey Island WA
NA-065


On Tue Sep 23 13:12 , Eric  sent:


   OK,
   I  tried  to  load  new  firmware  to the K3, not using the USB-serial
   cable, but thru the micro keyer interface which is normally connected
   to  the  K3.  At first my PC 'sees' the K3 but during upload something
   went  wrong  and  now  I have a K3 displaying MCU LD and a blinking TX
   LED.
   Anyone has a lead here?
   vy 73 Eric PA3CEV
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Re: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?

2008-09-23 Thread Paul Christensen

Wayne,

Ahhh...I think I see now.  In effect, it's really an ALC loop gain 
calibration, with ALC gain optimized for each band -- correct?  This sounds 
very similar to what Ten Tec is using with their Omni VII, only their 
calibration is conducted once at the factory to achieve optimum band-by-band 
ALC gain.  Their rig also nicely preserves the raised-cosine CW waveform at 
all power levels.


For some reason, I had this thought in my head that forward gain between say 
the driver stage and PA was being changed in the firmware, irrespective of 
the ALC.  Perhaps it was the TX Gain nomenclature...


Also, after the TX Gain calibration, I am seeing about 75-80W (with PWR set 
to 100W) on 10M and 6M into my Bird TermaLine load and measured with LP-100 
and Alpha 9510 WM.  No big deal but I just wanted to know if this is a 
normal unit-by-unit variation?  This may, or may not be correlated with 
Joe's comment concerning WM slope.


Paul, W9AC

- Original Message - 
From: wayne burdick [EMAIL PROTECTED]

To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Tuesday, September 23, 2008 4:41 PM
Subject: [Elecraft] Re: K3 - 'Unwanted' TX Gain calibrations?



Hi Paul,


Been wondering just how the TX Gain calibration works. To quote from the
manual - The gain constant is updated whenever the TUNE function is 
activated on a given band at one of three specific power levels: 5.0W, 
50W, and 1.00 milliwatt.


To Stewart's point, does the gain of the K3 recalibrate every time TUNE 
is depressed at one of the three stated power levels... ?


Yes. It doesn't matter whether you select one of these power levels 
manually using the PWR knob, or using the TUN PWR menu entry. It will 
always recalibrate the gain constant during TUNE if you happen to be at 
one of these power levels.


However, it will only do this if the SWR is 2.0:1 or less. This provides 
plenty of safety margin.


Finally, what prevents the re-loading of new gain data if as Stewart 
suggest, he sets the K3 power to exactly 5 watts or 50-watts and 
depresses TUNE for external ATU tuning purposes?  Should he instead stay 
away from those two values and use perhaps 49 or 51 watts?


No need to do this. The fact that it recalibrates every time you do TUNE 
at one of these levels is not a problem. It just updates the EEPROM 
constant if it has changed.


The TX gain constant is only there to compensate for small per-band gain 
variation within the K3's transmitter. If you've done the power 
calibration, then you can set PWR and be fairly close to the target level 
on each band. Thus the MCU won't have to adjust power very much in real 
time. In CW mode, this means we can apply our keying waveform open-loop, 
preserving the target raised-cosine shape at all power levels. In voice 
modes it helps achieve our goal of applying a minimum of ALC.


73,
Wayne
N6KR


---

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Re: [Elecraft] K3 and MARS

2008-09-23 Thread David F. Reed

Michael,

MARS requires us to not disclose the frequencies we use or their 
designators, but I do use my K3 on MARS frequencies quite successfully.


There is one modification required, and some self imposed limitations.

The modification is accomplished by running a program Elecraft can 
provide; it is easily revered should you choose to by using the same 
program.


The frequency allocations differ a bit bit associated service (Army 
MARS, Navy Marine Corps MARS, Air Force Mars), but each one will tell 
you theirs on admission.


So, don't worry, your K3 will work very will on the MARS frequencies and 
digital modes they use (with the right sound card  software, etc.).


Good luck!

73 de Dave, W5SV / NNN0SLA

Michael Fox (K5MEF) wrote:

Is anyone using the K3 for MARS work?

If so, can you contact me off-list to provide more info?

I'm interested in getting involved with MARS.  But the application simply
asks if you're able to transmit/receive on MARS frequencies without
specifying what those frequencies are.  So, I'd like to know what
frequencies I need to worry about and what, if any, modifications are needed
to the K3 to make it able to participate in MARS work.

Thanks in advance.

73,
Michael - K5MEF
 



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Re: [Elecraft] K3 and MARS

2008-09-23 Thread David F. Reed

Make that easily reversed...

--Dave

David F. Reed wrote:

Michael,

MARS requires us to not disclose the frequencies we use or their 
designators, but I do use my K3 on MARS frequencies quite successfully.


There is one modification required, and some self imposed limitations.

The modification is accomplished by running a program Elecraft can 
provide; it is easily _revered_ should you choose to by using the same 
program.


The frequency allocations differ a bit bit associated service (Army 
MARS, Navy Marine Corps MARS, Air Force Mars), but each one will tell 
you theirs on admission.


So, don't worry, your K3 will work very will on the MARS frequencies 
and digital modes they use (with the right sound card  software, etc.).


Good luck!

73 de Dave, W5SV / NNN0SLA

Michael Fox (K5MEF) wrote:

Is anyone using the K3 for MARS work?

If so, can you contact me off-list to provide more info?

I'm interested in getting involved with MARS.  But the application 
simply

asks if you're able to transmit/receive on MARS frequencies without
specifying what those frequencies are.  So, I'd like to know what
frequencies I need to worry about and what, if any, modifications are 
needed

to the K3 to make it able to participate in MARS work.

Thanks in advance.

73,
Michael - K5MEF
 



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[Elecraft] Scheduling software?

2008-09-23 Thread Mike Keller
I forgotten to tune in to a net or a bulletin so many times that I would 
like to have an automated solution.  The K3 Alarm  function is a good 
first step for a single event but

what I would prefer is the ability to build a multi event schedule.
Does anyone know if there already is a program where you can enter start 
times, duration, frequencies and modes,into a table then have the K3 
folow the schedule?


Tnx,

Mike Keller
W1BNC
K2 3339
K3   598


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RE: [Elecraft] OT freeby

2008-09-23 Thread Dale Putnam

Let's see to Hicksville... from Hicksville... days off work three K 
ride pretty scenery
Sell it to XYL.  not likely. 
check cost of relocating Hicksville closer s'pose they'd notice tho.if 
from nothing else... the lack of trees would give it away.
 
well.. that was fun... but not as much as climbing a tower with a new to me 
rotator--... ...--Dale - WC7S in Wy From: [EMAIL PROTECTED] To: 
elecraft@mailman.qth.net Date: Tue, 23 Sep 2008 16:00:23 -0400 Subject: 
[Elecraft] OT freeby  I have 2 old antenna rotators that I want to dispose 
of, one is a CDR and the other is a Ham-M...These are 70's vintage but they 
work perfectly...They are free to anyone who can come to my QTH and pick them 
up, first come, first served...I cannot get out to mail them, therefore they 
will not be posted on e-bay...I also have a 10 foot Rohn tower with roof 
mounting kit and bottom mounted rotator plate. ..It is a little rusty but sound 
and salvageable with a little Rustoleum...  I am located in Hicksville, NY 
which is in the center of Nassau County on Long Island...Contact me direct and 
off the reflector...I do not monitor the reflector...  Jerry McCarthy, 
wa2dkg ___ Elecraft mailing list 
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Re: [Elecraft] Scheduling software?

2008-09-23 Thread Jim Miller
http://www.developerplus.com/

Click on Product search
type in Schedule Wizard

Single User $29.

Will do all scheduling - sound alarms, pop up on your screen, run a
program
---Does repeats, snooze, early warning pop up windows, second Tuesdays, last
Fridays, every Monday and Thursday, once only, once monthly, once yearly,
etc, etc.  Prints calendar format, memo format, list format, for date range
specified and on and on.

--- so, set up your HRD to whatever you use to turn on your radio when it
comes up and whatever else you want it to do automatically.

Vince writes a great program.  Bought it probably over 10 years ago.  Did
upgrade to next level last year.

No monitory interest, just a satisfied customer.  $29. That's it.

73, Jim KG0KP


- Original Message - 
From: Mike Keller [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Tuesday, September 23, 2008 8:59 PM
Subject: [Elecraft] Scheduling software?


 I forgotten to tune in to a net or a bulletin so many times that I would
 like to have an automated solution.  The K3 Alarm  function is a good
 first step for a single event but
 what I would prefer is the ability to build a multi event schedule.
 Does anyone know if there already is a program where you can enter start
 times, duration, frequencies and modes,into a table then have the K3
 folow the schedule?

 Tnx,

 Mike Keller
 W1BNC
 K2 3339
 K3   598


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[Elecraft] RE: A Bad Thing Happened To My K2 - Update 1

2008-09-23 Thread Mark Saunders, KJ7BS
Thanks to everyone for the suggestions.  Here is some more information
resulting from your suggestions.

I have no measurable RF output on 40m or any meaningful RX on 40m.  

The RX/TX works on all other bands including 160m.

I get the same RX/TX results from ANT1  ANT2 and main.

I get the same RX results on the receive ANT.

Mark, KJ7BS
Glendale, AZ
Editor, The SKCC Centurion
Elecraft K2 S/N 0539
Fists # 2972 CC 1806
SKCC # 2240 C56 T20
MQFD # 128
QRP-ARCI # 12647
AZ ScQRPions
COGRC Emergency Communications

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mark Saunders, KJ7BS
Sent: Monday, September 22, 2008 10:04 PM
To: Elecraft Mail List
Subject: [Elecraft] A Bad Thing Happened To My K2
Importance: High

This evening I had a guest ham in the shack who was curious about my K2 and
asked if we could hook it up.  So we did.  I pointed out which 12v power
strip, power cord, and antenna to use.  While I was getting the proper
computer interface cables hooded up, my guest connected the radio to the
power and switched it on.  I heard a loud snap and immediately looked in the
direction of the K2 operating position.  My guest had a strange look on his
face and I asked what happened.  There was a spark from the outside of the
antenna connector on the back of the K2 to the center connector of the coax.

 

That can't happen, right?  Wrong.

 

After shutting down the power supply and inspecting things, I discovered my
guest had wired the power backwards.  Fortunately the reverse polarity
circuitry protected the radio and internal battery.  The radio was operating
from the battery, that's why it came on.  I still can't understand where the
spark came from.  However, I now have virtually NO receive on 40m, that's
where the radio was when the spark occurred.  I have transmit and receive on
all other bands and transmit on 40m, just no receive on 40m.

 

That spark killed something dealing with 40m receive.  It is so bad I can't
even hear the local oscillator around 7000 KHz with the pre-amp on.  There
is no CW or SSB receive.

 

Mark, KJ7BS
Glendale, AZ
Editor, The SKCC Centurion
Elecraft K2 S/N 0539
Fists # 2972 CC 1806
SKCC # 2240 C56 T20

MQFD # 128
QRP-ARCI # 12647
AZ ScQRPions

COGRC Emergency Communications

 

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RE: [Elecraft] K3 power cord

2008-09-23 Thread Ron D'Eau Claire
It's a separate kit included with your K3 gratis exactly for people like
yourself who don't have extra APP cables lying around. 

That's why you don't find it mentioned in the K3 manuals. 

Ron AC7AC


[EMAIL PROTECTED] wrote:
 Hello
 I'm beginning to prepare for the assembly of
 my K3 when it arrives in a few days.
 Does Elecraft supply a power cord with it? I
 can't find anything about that in the assembly
 manual or the operating manual.
 Scott
 N5SM

   

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[Elecraft] My K3 on order

2008-09-23 Thread K7JB
Hi Elecraft:

I recently mailed a bank check for my K3.  Please let me know if you received 
the money.

Thanks John K7JB
[EMAIL PROTECTED]
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RE: [Elecraft] RE: A Bad Thing Happened To My K2 - Update 1

2008-09-23 Thread Joe Subich, W4TV

 I have no measurable RF output on 40m or any meaningful RX on 40m.  
 
 The RX/TX works on all other bands including 160m.
 
 I get the same RX/TX results from ANT1  ANT2 and main.
 
 I get the same RX results on the receive ANT.

The only thing I see that is common to transmit, receive and 
the RX antenna and is only in circuit on 40 meters is the Band 
Pass Filters - particularly the toriods L1 and L2.  

If you had not said the RX Ant was also dead, I would suspect 
L25 and/or L26 in the Low Pass filter.  

If you have a separate antenna for 40 meters and are connecting 
it to the receive antenna for testing, I would also check the 
antenna (or tuner).   

 My guest had a strange look on his face and I asked what 
 happened.  There was a spark from the outside of the antenna 
 connector on the back of the K2 to the center connector of the 
 coax.

This would indicate a DC path through the secondary of the PA 
output transformer, (RF board), through the LPF and to the 
antenna connector.  With +12V on the chassis (reversed power 
supply), I can see damage to one or both of the toroids in the 
LPF, damage to relay K12 or damage to the antenna system (balun?). 

73, 

   ... Joe, W4TV 
 



 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Mark 
 Saunders, KJ7BS
 Sent: Tuesday, September 23, 2008 11:51 PM
 To: 'Elecraft Mail List'
 Subject: [Elecraft] RE: A Bad Thing Happened To My K2 - Update 1
 
 
 Thanks to everyone for the suggestions.  Here is some more 
 information resulting from your suggestions.
 
 I have no measurable RF output on 40m or any meaningful RX on 40m.  
 
 The RX/TX works on all other bands including 160m.
 
 I get the same RX/TX results from ANT1  ANT2 and main.
 
 I get the same RX results on the receive ANT.
 
 Mark, KJ7BS
 Glendale, AZ
 Editor, The SKCC Centurion
 Elecraft K2 S/N 0539
 Fists # 2972 CC 1806
 SKCC # 2240 C56 T20
 MQFD # 128
 QRP-ARCI # 12647
 AZ ScQRPions
 COGRC Emergency Communications
 
 -Original Message-
 From: [EMAIL PROTECTED] 
 [mailto:[EMAIL PROTECTED] On Behalf Of Mark 
 Saunders, KJ7BS
 Sent: Monday, September 22, 2008 10:04 PM
 To: Elecraft Mail List
 Subject: [Elecraft] A Bad Thing Happened To My K2
 Importance: High
 
 This evening I had a guest ham in the shack who was curious 
 about my K2 and asked if we could hook it up.  So we did.  I 
 pointed out which 12v power strip, power cord, and antenna to 
 use.  While I was getting the proper computer interface 
 cables hooded up, my guest connected the radio to the power 
 and switched it on.  I heard a loud snap and immediately 
 looked in the direction of the K2 operating position.  My 
 guest had a strange look on his face and I asked what 
 happened.  There was a spark from the outside of the antenna 
 connector on the back of the K2 to the center connector of the coax.
 
  
 
 That can't happen, right?  Wrong.
 
  
 
 After shutting down the power supply and inspecting things, I 
 discovered my guest had wired the power backwards.  
 Fortunately the reverse polarity circuitry protected the 
 radio and internal battery.  The radio was operating from the 
 battery, that's why it came on.  I still can't understand 
 where the spark came from.  However, I now have virtually NO 
 receive on 40m, that's where the radio was when the spark 
 occurred.  I have transmit and receive on all other bands and 
 transmit on 40m, just no receive on 40m.
 
  
 
 That spark killed something dealing with 40m receive.  It is 
 so bad I can't even hear the local oscillator around 7000 KHz 
 with the pre-amp on.  There is no CW or SSB receive.
 
  
 
 Mark, KJ7BS
 Glendale, AZ
 Editor, The SKCC Centurion
 Elecraft K2 S/N 0539
 Fists # 2972 CC 1806
 SKCC # 2240 C56 T20
 
 MQFD # 128
 QRP-ARCI # 12647
 AZ ScQRPions
 
 COGRC Emergency Communications
 
  
 
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[Elecraft] k3 shipment

2008-09-23 Thread wsm

Well my K3 was shipped today, but according to ups it is going to
an address that doesn't exist. The box could have the right
address on it and ups just made the mistake when they sent me the
notification that it is being shipped. Or it could end up at who
knows where? Who knows?  I'm beginning to think I am snake bit!
Scott
N5SM 

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