[Elecraft] K3/100 #282 -- KRX3 and KXV3

[vu2nks]

Hi All,
  Rcvd KRX3 and KXV3 yesterday
   I want to install both together.With minimum work steps.
   My K3/100 is working fine,so I do not want the rig exposed to
   me for long time
  73,
 VU2NKS.Nandu
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Re: [Elecraft] K3 Microhpone

[Julian, G4ILO]

Fern Rivard wrote:
 
 You must be kidding as real serious hams DO NOT use heil mics. They
 are overpriced and have lousy audio. One gets much nice transmit audio
 using good quality dynamic microphone rather than those cheap elecret
 cartridges.
 
I used to think Heil mics were overpriced but at the moment, here in Europe,
the prices compare quite favourably with mics from the main radio
manufacturers like Yaesu and Kenwood.

I always liked the bright Heil sound. I have always liked the audio from
Icom rigs, as well, which I believe normally use electret mics.

I think ham radio is becoming like other endeavours and becoming subject to
fashion regardless of whether it is practical. There appears to be a
fashion now to transmit broadcast FM quality. Personally I think ham radio
is mostly about trying to communicate under often less than ideal conditions
and audio with some treble emphasis does that better, regardless of whether
or not it sounds natural.

-
Julian, G4ILO
http://www.g4ilo.com/ G4ILO's Shack 
http://www.ham-directory.com/ Ham Directory 
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[Elecraft] K3 and Turner Mic

[Gary Gregory]

I have my settings for the Turner Plus2 as follows.

Mic Gain: 40
Comp:  16 (when used)
EQ is being used as my voice is not of a broadcasters quality, but the
resultant audio is very, very good.

Observing the waveform of the audio on a spectrum analyser shows a very good
balance between hi's medium and low's and when used with ESSB the waveform
changes slightly to provide a more rounded and fuller (fidelity) audio, but
again the waveform is where it should be on a spec-an.

Monitoring the audio on another receiver revealed the audio with and without
ESSB activated provided an all round hi-fidelity audio with enough punch for
DX work.

I am sure the Heil mics, or for that matter many of the other mics
available, will provide good results and it will always be up to each
operators personal preference as to which mic they settle on. Playing with
the EQ on TX will in most cases make an average mic sound good. We did the
same testing with the Heil dual element mic and results would have pleased
most operators but for my voice it did not provide the quality I was looking
for and found with the old Turner mic.

I have difficulty wearing headsets, hence I have not gone down that road.

73's,
Gary
VK4WT
Stokers...we get ya goin'
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Re: [Elecraft] K3 Microhpone

[LA4AMA]

The Kenwood MC-90 are a very good desktop microphone who fits directly on
the K3 connector without resoldering. It has a wider frequency range than
the Heil HC4 or HC5 and gives you a broader range of sound possibilities.

The MC-90 is a 250 ohm dynamic microphone without any amplification, only a
2 step low-cut switch on the bottom of the base. It is the best all-round
desktop microphone I have tried, suitable for both full-sounding ragchew
and DX.

Link: http://www.universal-radio.com/catalog/mics/1870.html

Frequency response:
http://www.universal-radio.com/catalog/mics/1870grap.html

Heil HC4 and HC5 freq-response:
http://www.heilsound.com/amateur/products/gm/frequency_response.jpg
Sound-file: http://www.heilsound.com/amateur/products/hm10dual/hm10.mp3

As you see the Heil elements (especially the HC4) has almost no
audio-response below 400-500Hz and will sound very narrow. On the MC-90
you can set lowcut to position V2 and have a similar sound.

There are 2 replaceble microphone heads, use the one without holes in the
side for a bit more treble response. 

Microphone connector:
http://www.universal-radio.com/catalog/mics/1870plug.jpg

Since the MC-90 has no connection on pin 5 or pin 6 (+8V) it can be safely
used on the K3.

Best regards
LA4AMA
Roar

---

Julian, G4ILO wrote:
 
 
 I used to think Heil mics were overpriced but at the moment, here in
 Europe, the prices compare quite favourably with mics from the main radio
 manufacturers like Yaesu and Kenwood.
 
 I always liked the bright Heil sound. I have always liked the audio from
 Icom rigs, as well, which I believe normally use electret mics.
 
 I think ham radio is becoming like other endeavours and becoming subject
 to fashion regardless of whether it is practical. There appears to be a
 fashion now to transmit broadcast FM quality. Personally I think ham radio
 is mostly about trying to communicate under often less than ideal
 conditions and audio with some treble emphasis does that better,
 regardless of whether or not it sounds natural.
 

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Re: [K2] [Elecraft] KNB2 vs. electric fence.

[OE5CSP-Chris]

Joe Planisky wrote:
 
 Hey folks,
 
 I've recently started picking up relatively strong pulses at 1 second  
 intervals on my K2.  I suspect they're coming from a new electric  
 fence somewhere in the neighborhood.  But where they're coming from is  
 immaterial to my question.
 
 Should the KNB2 noise blanker be effective against this type of  
 noise?  I've always thought that such impulse type noise was exactly  
 what noise blankers were supposed to work best on, but I hear no  
 difference in the pulses whether the NB is on or off, nor at high or  
 low threshold settings.  This is making me question whether the NB is  
 working at all.
 
 Any thoughts?
 
 73
 --
 Joe
 KB8APprobably try the
 
 Folks,
 
 I´ve bought my NB because I had problems with a cow fence here in my
 neighbourhood.The noise blanker of my K2 does not do anything, so I´ll
 probably try the modification mentioned above, if it´s worth doing it.
 Both, my K3 and IC 761 have very good noise blankers, so maybe Elecraft
 thinks about redesigning it! I´ll certainly buy a new one, if I can get
 rid the QRM.
 
 
 73, Chris-OE5CSP
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[Elecraft] New K3 Power output problem

[Barry Simpson]

I have just completed building K3 #1397. It includes the KPA3, KXV3, KBPF3
and four filters.

 

It went together very well and all is working fine so far except the power
output.

 

I have done the 50W calibration per band and that produces an output of 50W.
However a setting on the power control of 71W gives 100W out and 76W gives
an actual 120W out. From there the power controls gives an output of up to
and beyond 150W.

 

I have tried recalibrating and I have downloaded the latest but to no avail.
I have also emailed Elecraft but given it is the weekend I do not expect to
hear from them for a few days.

 

I wonder if anyone else has had this problem and if so how it was cured. Or
has anyone any suggestions. I think I might take out and reseat the KPA3 in
case it is a bad contact but I don't think it is that.

 

Barry Simpson  VK2BJ

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[Elecraft] FS K2

[RAIMBAULT Christophe]

Hi,

I have for sale:

K2 (SN 2354) firm 2.03d/1.07 with options:
-Improving temperature stability
-K2 TX/RX external relay
-KSB2
-KNB2
-K160RX

I ordered a potentiometer for AF Gain.I will receive next week

Price:  650 Euros

k2(SN3603) firm 2.03d/1.07 with options:
-K2 PLL upgrade kit( E8501?)
-K2 VCO shielding (k2vcoshldkt)
-K2 rev A to B
-K2 rit/split led mod
-KPA100 + KPA 100 shield ( kpa100mdkt)
-KNB2
-KAF2
-K160RX

Price: 900 Euros


73' Chris F5CBQ
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[Elecraft] K3 AGC remarks de W8JI

[DOUGLAS ZWIEBEL]

Tom said,
[snip]
Although I just started using the K3, I really like the AGC system so
far. That's in contrast to other digital AGC systems I quickly learned
to *dislike*. Low band DXers or contesting people will really like the
slope adjustment feature.

73 Tom
[end snip]

Wow...coming from Tom, this is indeed HIGH PRAISE.

The kudos from well respected contesters, DXers, and Low Band
aficionados just keep piling up.  Such uniformity of accolades from
such well-respected and/or renown, elite ops is quite rare, perhaps
never before duplicated.  Glad I chose K3!

Congrats to Eric, Wayne, Lyle, et al.

de Doug KR2Q

PS  I think it is OUTSTANDING that when some criticism does show up,
rather than argue it's not a bug, it's how it was designed, the
Elecraft folks actually listen and respond (within days, if not
sooner) with the fix.   Other than zero sun spots, these are great
days for ham radio.
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[Elecraft] a wish for a balance control

[Charles Harpole]

As a guy with frequent ear problems, I wish rigs had a

balance control which puts more AF juice into one

side of the headphones compared to the other.

Age-ing hams  can wish  73

Charles Harpole

[EMAIL PROTECTED]


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Re: [Elecraft] a wish for a balance control

[n4lq]

Lot's of headphones have individual volume controls. MFJ has a pair that 
sounds good. Theirs has volume and tone contols. 
http://www.mfjenterprises.com/Product.php?productid=MFJ-392B

For $25 they are hard to beat.
Steve Ellington
[EMAIL PROTECTED]
- Original Message - 
From: Charles Harpole [EMAIL PROTECTED]

To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Saturday, August 09, 2008 9:11 AM
Subject: [Elecraft] a wish for a balance control



As a guy with frequent ear problems, I wish rigs had a

balance control which puts more AF juice into one

side of the headphones compared to the other.

Age-ing hams  can wish  73

Charles Harpole

[EMAIL PROTECTED]


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Re: [Elecraft] K2 power setting for SSB QRP?

[David Yarnes]

Most QRP contests have a QRP limit of 5 watts for both CW and SSB.  I know 
the ARRL does that.  ARCI, and I think GQRP, had QRP on SSB limited to 10 
watts, I think in an attempt to account for the disparity between the two 
modes.  Actually, I think they have it right, but to be safe in a contest 
you should probably observe the 5 watt limit on SSB as well as CW.  But you 
won't get any flack from me about running 10 watts and claiming to be QRP, 
or even 20 watts for that matter, in a QSO situation.  At those slightly 
higher power levels you are still observing the rule of moderation in my 
view.


In a way, it seems to me that if we really were to get picky about what 
QRP really is, we should adopt a rule similar to what they used to do for 
repeaters, and use ERP.  The antenna you are using plays such an important 
role in what you are really pumping into the ether.  If one 5 watt station 
is using a random wire, and the other is using a 3 element beam at 65 feet, 
it's hard to say they are equivalent!  People with marginal, or at least 
non-gain antennas, are always at something of a disadvantage.  But it's a 
disparity that could actually be accounted for to a degree in contests if 
they really wanted to make the playing field more level.  It's probably 
heresy to even suggest this, but on Field Day for example, you could allow 
stations using non-gain antennas to increase power somewhat, or have 
stations using gain antennas reduce power based on the standard DBd rating 
for the antenna being used.  There wouldn't be anything precise about it, 
but it would sure get things closer.  Maybe to simplify things you could 
just say a station using a non-gain antenna could run 10 watts.  That would 
be a bit more fair at least.  But I realize it ain't gonna happen!  And, 
of course, you have the same issue with the QRO folks.


The point is that the rules are very strict about power limitations, but 
they let people go nuts as to what antennas they use.  That effectively 
makes the power limitation moot!  And, as we all know, some stations do go 
to incredibly elaborate lengths as to their antenna systems.  But I'm just 
out there for the fun of it anyway, so I say more power to them!  How's 
that for a play on words!


Dave W7AQK

- Original Message - 
From: Ron D'Eau Claire [EMAIL PROTECTED]

To: elecraft@mailman.qth.net
Sent: Friday, August 08, 2008 12:47 PM
Subject: RE: [Elecraft] K2 power setting for SSB QRP?



it is whatever the rules say it is (which may differ from one contest /
award to another.)


Yeah, it's generally around 5 Watts for CW and some allow it to go up
to 10 Watts for SSB, but some stay at 5 Watts even for SSB.

--

The 'normal' (if anything is normal about Ham radio) QRP power level has
been defined over the past half century by the QRP Amateur Radio Club
International or QRP ARCI.

Their bylaws, Article 1, section B states:

QRP operation for QRP-ARCI purposes is defined as operation with a
transmitter power output of 5 watts or less for CW (Continuous Wave - A1)
and 10 watts PEP or less for SSB (Single Side Band - A3J).  QRP-ARCI awards
are based on these output levels.

Many contests and other organizations have followed these guidelines.

Bear in mind that what's considered QRP has changed over time. Back in the
1950's QRP was defined as 50 watts input to the final amplifier. That
normally resulted in between 30 and 40 watts RF output for a legal QRP
transmitter.

Times change, Hi!

The organized QRP movement began in the 50's as a rebuttal to the idea that
several hundred watts, perhaps even a kilowatt, was needed to really enjoy
Ham radio. A great many Hams ran 50 watts or less, and the organization
recognized their ability and the fact that they didn't need more power to be
very successful communicators.

In more recent years, my personal interest in QRP has not been in the low
power itself, but because that's where the bulk of today's homebrewers,
technicians and tinkerers hang out.

Ron AC7AC



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Re: [Elecraft] a wish for a balance control

[George Muggattee]

On Saturday 09 August 2008 14:11:56 Charles Harpole wrote:
 As a guy with frequent ear problems, I wish rigs had a

 balance control which puts more AF juice into one

 side of the headphones compared to the other.

Yes, I can identify with that problem Charles.
I find that I'm able to overcome it by tilting my head to one side, then,  
with practice the flow of juice can be equalised
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Re: [Elecraft] a wish for a balance control

[Jim Wiley]

Charles -


I purchased a set of Radio Shack headphones a few years ago that had 
separate level controls for each ear.  They were reasonably priced, very 
comfortable, and sounded great. 



You might want to have  a look at what they are offering today. Their 
web site shows a  pair by Coby for only $11.00 that has independent 
controls  R/S Cat Num 55010925.  



They also have another set that looks a bit better quality, and has a 
volume control, but I can't tell if each side is independently 
adjustable, for $13.00 .   Their Cat Num 55010865.   The usual 
disclaimers apply.



- Jim, KL7CC



Charles Harpole wrote:

As a guy with frequent ear problems, I wish rigs had a

balance control which puts more AF juice into one

side of the headphones compared to the other.

Age-ing hams  can wish  73

Charles Harpole

[EMAIL PROTECTED]


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Re: [Elecraft] K2 power setting for SSB QRP?

[hank k8dd]

- Original Message - 
From: David Yarnes [EMAIL PROTECTED]

To: Ron D'Eau Claire [EMAIL PROTECTED]; elecraft@mailman.qth.net
Sent: Saturday, August 09, 2008 9:20 AM
Subject: Re: [Elecraft] K2 power setting for SSB QRP?


Most QRP contests have a QRP limit of 5 watts for both CW and SSB.  I know 
the ARRL does that.  ARCI, and I think GQRP, had QRP on SSB limited to 10 
watts, I think in an attempt to account for the disparity between the two 
modes



QRP-ARCI defines QRP as:

QRP operation for QRP-ARCI purposes is defined as operation with a 
transmitter power output of 5 watts or less (CW)(A1) and 10 watts PEP or 
less (SSB)(A3J). QRP-ARCI awards are based on these output levels.


.
I believe most other QRP organizations agree with this, although there are 
some groups / contests that specify that SSB QRP is 5 watts (or less) output 
on all modes.  As far as I know, no one uses the well discussed (and 
sometimes over discussed!) use of ERP in QRP power levels.


72  73HankK8DD 


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[Elecraft] New K3 Fails Filter Setup

[Jack Regan]

After a smooth build I have ground to a halt at the low power filter
calibration stage.

 

I get the ERR TXF error message.

 

I have a 2.8 KHz filter in slot 3 and a 400 Hz filter in slot 4.

 

When I try to transmit with a paddle I get dots (or dashes) and then the
error message. 

 

I have gone thru the filter setup more times than I can count and nothing
changes.

The Width button cause the display to show which filter is being used as it
goes up or down.

The TX led flashes.

 

FL1, FL2 and FL5 are all set to off.

 

FL3 has FL BW = 2.8

FL4 has FL BW = .4

 

FL1, 2 and 5 have the BW set to 0.

 

All the filters have the FRQ  and GN set to 0.

 

I am going to call Elecraft but being Saturday I am not sure I'll reach
anyone so I have turned to the reflector.

 

I tried searching archives but only found check the filter setup answer.
Nothing specific enough to make me see what I have done wrong.

 

I am going to take a nap now after staying up all nite trying to figure this
one out!

 

Jack, AE6GC, KX1 1403, K3 1433.

 

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Re: [Elecraft] New K3 Fails Filter Setup

[Lyle Johnson]

I get the ERR TXF error message.


Be sure CONFIG:FIL TX is set to FL3 in CW and SSB modes since that is 
the slot in which you have installed your 2.8 kHz filter.


73,

Lyle KK7P

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[Elecraft] Re: New K3 Power output problem

[Fern Rivard]

Hi Barry:

It looks like your radio will need calibration of the power settings which 
as NOT shown in the owners manual. You will need to get that info from Elecraft 
or someone else on this reflector that has that info hany. I had to do that 
with my K3 back in Feb of 08 as it did not have full spec output on all bands
73 from Fern  VE7GZ with K3 #412



- Original Message - 
From: Barry Simpson [EMAIL PROTECTED]
To: 'Elecraft' elecraft@mailman.qth.net
Sent: Saturday, August 09, 2008 3:31 AM
Subject: [Elecraft] New K3 Power output problem


I have just completed building K3 #1397. It includes the KPA3, KXV3, KBPF3
and four filters.

 

It went together very well and all is working fine so far except the power
output.

 

I have done the 50W calibration per band and that produces an output of 50W.
However a setting on the power control of 71W gives 100W out and 76W gives
an actual 120W out. From there the power controls gives an output of up to
and beyond 150W.

 

I have tried recalibrating and I have downloaded the latest but to no avail.
I have also emailed Elecraft but given it is the weekend I do not expect to
hear from them for a few days.

 

I wonder if anyone else has had this problem and if so how it was cured. Or
has anyone any suggestions. I think I might take out and reseat the KPA3 in
case it is a bad contact but I don't think it is that.

 

Barry Simpson  VK2BJ

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RE: [Elecraft] New K3 Fails Filter Setup

[Jack Regan]

As soon as I went up the stairs to take a nap the answer came to me.  The FL
TX CW has to be set for the 2.8 filter for each filter slot.
When I changed that parameter for the 400 HZ filter I was able to transmit
dots and dashes and did not get the error message!



-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jack Regan
Sent: Saturday, August 09, 2008 8:27 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] New K3 Fails Filter Setup

After a smooth build I have ground to a halt at the low power filter
calibration stage.

 

I get the ERR TXF error message.

 

I have a 2.8 KHz filter in slot 3 and a 400 Hz filter in slot 4.

 

When I try to transmit with a paddle I get dots (or dashes) and then the
error message. 

 

I have gone thru the filter setup more times than I can count and nothing
changes.

The Width button cause the display to show which filter is being used as it
goes up or down.

The TX led flashes.

 

FL1, FL2 and FL5 are all set to off.

 

FL3 has FL BW = 2.8

FL4 has FL BW = .4

 

FL1, 2 and 5 have the BW set to 0.

 

All the filters have the FRQ  and GN set to 0.

 

I am going to call Elecraft but being Saturday I am not sure I'll reach
anyone so I have turned to the reflector.

 

I tried searching archives but only found check the filter setup answer.
Nothing specific enough to make me see what I have done wrong.

 

I am going to take a nap now after staying up all nite trying to figure this
one out!

 

Jack, AE6GC, KX1 1403, K3 1433.

 

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RE: [Elecraft] K3 Microhpone

[Bill NY9H]

At 11:23 PM 8/8/2008, Charles Harpole wrote:

Real serious hams use Heil headphone/mic set.


What I believe, my opinion after selling microphones since 1981, for 
Sennheiser ..then AKG then Shure Brothers is different. Our firm was 
their exclusive agent in Illinois  Wisconson, so we sold tens of 
thousands,,, ( if you count the SM58).


Many real serious appliance operators do not know how to wire up 
a microphone,

 much less grab an electret element and assemble their own microphone.

Which is not to say there is something wrong with being an appliance operator;
but not all real serious  hams use heil products.

MANY Real serious audio hams use AKG  Sennheiser and some of the 
Shure product line, from companies that have engineers and anechoic 
chambers  . ( and actually manufacture the mic element, not just the case)


Some of heils product graphs were marked as being made in an anabolic chamber.
You best look up that one. Even the magazine articles.

Bob had done a great job awakening the ham community to difference a 
mic can make.


The rising hi end frequency responsehowever is something Al Gore 
invented and licensed it to Shure Bros in the 50s for their # 444 and 
other communication  paging microphones.


I use a mini 414b handheld for my K3 which you can drive a truck 
over has one of those million-cycle switches...and has 
fantastic audiofor SSB.


too bad it was discontinued years ago
many hamfests have a larger similiar 'paging' product, and they sell 
for 5$ at the hamfests, marked Johnson, RCA, or areoflex..or some 
other American radio company who bought them from Shure.


http://www.shure.com/ProAudio/Products/WiredMicrophones/us_pro_514B_content


LOUD  CLEAR

go rip out an electret element from a discarded telephone and 
surprise yourself


ranting off
bill


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RE: [Elecraft] a wish for a balance control

[Ron D'Eau Claire]

-Original Message-
Steve, N4LQ, wrote:
Lot's of headphones have individual volume controls. MFJ has a pair that 
sounds good. Theirs has volume and tone contols. 
http://www.mfjenterprises.com/Product.php?productid=MFJ-392B
For $25 they are hard to beat.

--

Oh, my word! Reading the ad I find this:
Near zero loss on signal transmission from the gold plated plug and cord.

I've seen many uncomplimentary comments about MFJ over the years, most of
which, IMHO, weren't really justified, but this starts to change my mind.
Maybe the ad writer was being paid by the word but that statement is almost
in the class of the cryogenically-treated power cords for audio amps. 

Clicking on the photo for a close up shows the Styrofoam dummy head wearing
them with the phone marked R on his left ear. Oh well, he doesn't pretend
to be anything but a dummy from what I can see. 

I wonder if the cord really is gold plated like the ad said?

Ron AC7AC




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[Elecraft] K3 Microphones

[Ron D'Eau Claire]

I have no experience with Heil mics. I get unsolicited great reports on my
K3 using the mic I assembled for my K2. It's a Radio Shack 290-090C electret
element in a discarded hand mic enclosure, using the original pop screen.

The element sells for $2.70 and has a nice approx. +10 dB hump in its
response around 5 kHz that greatly helps communications intelligibility by
stretching the upper frequency range of most rigs (a small bit like the
effect those using ESSB are getting when received on conventional SSB
receivers). 

For under US$3 it's a hard bargain to beat if one's primary criteria are
performance and cost.

So why buy an Elecraft mic, or any mic? 

Convenience. All the parts are there, including the hard to fabricate or
hard to find ones. It's assembled with the right connectors. It's
guaranteed. 

Pre-assembled plug-n-play mics are a great bargain for those who don't
enjoy building or who have a limited junk box (or patience!). 

Ron AC7AC 




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Re: [Elecraft] a wish for a balance control

[n4lq]

At least those headphones work in data modeSome of the more expensive 
headphones are just analog!


Steve Ellington
[EMAIL PROTECTED]
- Original Message - 
From: Ron D'Eau Claire [EMAIL PROTECTED]

To: 'Elecraft Reflector' elecraft@mailman.qth.net
Sent: Saturday, August 09, 2008 11:58 AM
Subject: RE: [Elecraft] a wish for a balance control



-Original Message-
Steve, N4LQ, wrote:
Lot's of headphones have individual volume controls. MFJ has a pair that
sounds good. Theirs has volume and tone contols.
http://www.mfjenterprises.com/Product.php?productid=MFJ-392B
For $25 they are hard to beat.

--

Oh, my word! Reading the ad I find this:
Near zero loss on signal transmission from the gold plated plug and 
cord.


I've seen many uncomplimentary comments about MFJ over the years, most of
which, IMHO, weren't really justified, but this starts to change my mind.
Maybe the ad writer was being paid by the word but that statement is 
almost

in the class of the cryogenically-treated power cords for audio amps.

Clicking on the photo for a close up shows the Styrofoam dummy head 
wearing
them with the phone marked R on his left ear. Oh well, he doesn't 
pretend

to be anything but a dummy from what I can see.

I wonder if the cord really is gold plated like the ad said?

Ron AC7AC




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No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.138 / Virus Database: 270.6.0/1601 - Release Date: 8/8/2008 
9:02 AM






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RE: [Elecraft] K3 Microhpone

[Jim Brown]

On Sat, 09 Aug 2008 10:51:05 -0500, Bill NY9H wrote:

The rising hi end frequency responsehowever is something Al Gore 
invented and licensed it to Shure Bros in the 50s for their # 444 and 
other communication  paging microphones.

My good friend Bill is kidding here, of course, but he knows what he's 
talking about. To understand mics and audio for ham radio, check out 
my tutorial, which shows the real reason for the rising hi end 
response in a 444 (which is what they did with the SM58 as well, and 
for a similar reason). 

http://audiosystemsgroup.com/RFI-Ham.pdf  

and the Power Point for my presentation to ham clubs  

http://audiosystemsgroup.com/HamInterfacing.pdf

If I lived outside the US and wanted to buy a good mic for ham radio, 
it would be an ElectroVoice RE11 or RE16. These are pro mics, so they 
don't have PTT switches, but they sound great on good ham rigs. The 
tutorials show how to wire them and how to use them. In general, good 
quality dynamic mics last forever unless they are badly mistreated, so 
it's pretty safe to buy them used. 

The discontinued Shure SM53 and SM54, aand AKG D202, D222, and D224 
are equivalent to the RE11 and RE16. Of these, only the RE16 is still 
a current product. 

73,

Jim Brown K9YC


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[Elecraft] FS: MC-80 Mic. good for K3

[n4lq]

For Sale:
Kenwood MC-80 Microphone. Plugs directly into the front panel of the K3. Has 
internal battery for mic. No wiring changes needed. Up/Down  buttons will 
require plug wiring changes for K3. Have not tested this function.
Appearance is very good and audio sounds good with the K3 as it is. $65 
shipped Conus.

PayPal ok.

Details
http://www.universal-radio.com/CATALOG/mics/1026.html

Steve Ellington
[EMAIL PROTECTED] 


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[Elecraft] Re: New K3 Power output problem (Wrong trans. on KXV3)

[Eric Swartz WA6HHQ - Elecraft]

Hi Barry,

I apologize for the power control problem. We just confirmed Friday 
(yesterday) that a small number of our K3 KXV3 modules (less than 20) 
shipped between July 30 and August 5 may have an incorrect part 
installed. The problem modules will only be found in K3 kits. Factory 
assembled K3’s are not effected by this issue.


The resulting symptom is that the K3 will output much more RF power than 
the PWR control is set for. This most likely will be noticed when doing 
the 50 watt TX gain cal procedure. Instead of putting out 50 watts, the 
actual output will be around 70 watts on all bands. KXV3s with correct 
transistors will not exhibit this symptom.


To confirm if you have a KXV3 that is effected by this, the KXV3 (two 
board set) will need to be removed from the K3. (This is very easy - See 
instructions at the end of this email.)


The part in question is mounted on the PC board that does not have the 
BNC connectors. *If this board has a small sticker with the number 
“14704” and Q1 on the same board has '7AW' marked on it, you will need 
to exchange the KXV3 module for a replacement.*


Since some boards with 14704 number have been reworked and not marked, 
the best way to tell is to inspect Q1 and see if it is marked '7AW'. See 
picture below.


*Incorrect Transistor at Q1*

http://www.elecraft.com/K3/pics/Q1%20incorrect%20part.jpg

If your board has the incorrect part 'marked '7AW' please notify* * 
[EMAIL PROTECTED] or call 831 662 8345 and we will immediately 
replace your KXV3. /(Barry - I have already entered a KXV3 request into 
our parts request database - Eric.)/


Please also note that while waiting for the replacement you may continue 
using your K3 with the KXV3 removed. (Remember to set this option to 
'not installed' in the menu.)


Eric WA6HHQ



*KRX3 Board removal instructions.

*1. Remove the top cover of the K3.

2. Remove the two black screws on the top KIO3 rear trim panel. (do not 
remove the four nuts on the DB connectors)


3. Push the Digital IO board and trim panel assembly outward from the 
inside. (with rear of K3 facing you, press on the backs of the two DB 
connectors with both index fingers. The panel and digital IO boards come 
out together. See attached picture below.)


4. Remove the upper standoff from the KIO3 board. (this is only 
necessary if the KRX3 is installed.)


5. Pull the KIO3 board straight up and out of the K3 through the rear 
panel.


6. Reverse these steps to re-install the KXV3 assembly.

*Removal of KIO3 Digital Board (KXV3 is just below the KIO3.)*

http://www.elecraft.com/K3/pics/KXV3%20Removal_320.jpg

==

Barry Simpson wrote:

I have just completed building K3 #1397. It includes the KPA3, KXV3, KBPF3
and four filters.

It went together very well and all is working fine so far except the power
output.

I have done the 50W calibration per band and that produces an output of 50W.
However a setting on the power control of 71W gives 100W out and 76W gives
an actual 120W out. From there the power controls gives an output of up to
and beyond 150W.

I have tried recalibrating and I have downloaded the latest but to no avail.
I have also emailed Elecraft but given it is the weekend I do not expect to
hear from them for a few days.

I wonder if anyone else has had this problem and if so how it was cured. Or
has anyone any suggestions. I think I might take out and reseat the KPA3 in
case it is a bad contact but I don't think it is that.

Barry Simpson  VK2BJ
  

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[Elecraft] K3 - KEY OUT missing

[Benny Aumala]

Anybody with these symptoms:
With mike PTT (hard ground) I can easily command the amplifier through K3.
But with straight key or inbuilt keyer the KEY OUT is not grounding.
K3 itself sends OK.
Unfortunately I have not found schematic of back panel and the
power FET used in keying.
It also crossed my mind to have some switch wrong.

Benny   OH9NB
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[Elecraft] K3 - how to CONFIG without VFO B?

[LB3SA]

I just received my K3 kit and love the radio already! I have a problem
however... After about 1 hour of usage the VFO A encoder stopped working for
some strange reason. I swapped it for VFO B so it is definitely the encoder
and nothing else. But now I'm not able to use the menu or CONFIG since VFO B
is a must for this. Does anyone know if either N4PY or Ham Radio deluxe will
give me control of the CONFIG menu?

A new encoder will be ordered on Monday of course but from Elecraft to
Norway often takes more than a week (gasp!) :)

73,
Are - LB3SA
KX1 - K2 - K3
-- 
View this message in context: 
http://n2.nabble.com/K3---how-to-CONFIG-without-VFO-B--tp683139p683139.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3 - how to CONFIG without VFO B?

[hank k8dd]

The latest version of Ham Radio Deluxe will give you control
of most all the CONFIG menu functions . there are a couple
missing, but I don't think it would be a 'show stopper'.

73HankK8DD


- Original Message - 
From: LB3SA [EMAIL PROTECTED]

To: elecraft@mailman.qth.net
Sent: Saturday, August 09, 2008 2:29 PM
Subject: [Elecraft] K3 - how to CONFIG without VFO B?




I just received my K3 kit and love the radio already! I have a problem
however... After about 1 hour of usage the VFO A encoder stopped working 
for
some strange reason. I swapped it for VFO B so it is definitely the 
encoder
and nothing else. But now I'm not able to use the menu or CONFIG since VFO 
B
is a must for this. Does anyone know if either N4PY or Ham Radio deluxe 
will

give me control of the CONFIG menu?

A new encoder will be ordered on Monday of course but from Elecraft to
Norway often takes more than a week (gasp!) :)

73,
Are - LB3SA
KX1 - K2 - K3
--
View this message in context: 
http://n2.nabble.com/K3---how-to-CONFIG-without-VFO-B--tp683139p683139.html

Sent from the Elecraft mailing list archive at Nabble.com.

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[Elecraft] K2+Softrock xtal

[rt_clay]

If you are using a Softrock as a panadapter with your K2 you might be 
interested in this:
 
The  usual Softrock setup used with the K2 is slightly different than the 
standard Softrock setup because it samples in 3rd harmonic mode because a 
correct xtal freq is not easily available. This mode is a little less 
sensitive. 
 
I found a cheaply available xtal that has a good freq for normal x4 sampling: 
19.8 Mhz, giving a Softrock LO of  4950 KHz. It is part 300-8213-1-ND at 
Digikey. It is a SMD crystal, so you do have to be a little creative in 
mounting it on the Softrock board. You also need to change some discrete 
components in the oscillator section beause it is a higher oscillator freq. But 
it seems to work well.
 
Tor
N4OGW
 

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[Elecraft] K3 locked up at UPS

[Jim Miller]

Looks like San Pablo locked the doors with my K3 inside and went home for the 
weekend.

Wondering if Lyle can make a DSP (Delivery and Ship Ping) code change to fix 
this problem.

73, Jim KG0KP
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[Elecraft] VFO indepence

[Eric]

Hi,


I'm not able to force CONFIG:VFO IND to yes. When I try, the LCD 
shows: NO SUB, the KRX3 is working fine


It's supposed to be possible to set the sub receiver to a different 
band from the main this way, but I can't get it to work.




Any ideas?


vy 73 Eric PA3CEV


K2 960
K3 122

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Re: [Elecraft] VFO indepence

[Lyle Johnson]

I'm not able to force CONFIG:VFO IND to yes...


This feature is not yet implemented, please check the release notes and 
errata.


73,

Lyle KK7P

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[Elecraft] K3 Receive audio in CW

[George]

Try playing with Receive EQ settings to reduce static noise.  Back off on 800 
hz maybe higher, depending on your personal hearing and your speaker setup.  
Experiment a bit.  Helped in my case.

73
George, n4ym
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Re: [Elecraft] K3 - how to CONFIG without VFO B?

[LB3SA]

Thanks - it worked! 

Now it will be MUCH easier to wait for a new encoder! :)


hank  k8dd wrote:
 
 The latest version of Ham Radio Deluxe will give you control
 of most all the CONFIG menu functions . there are a couple
 missing, but I don't think it would be a 'show stopper'.
 
 73HankK8DD
 
 
 - Original Message - 
 From: LB3SA [EMAIL PROTECTED]
 To: elecraft@mailman.qth.net
 Sent: Saturday, August 09, 2008 2:29 PM
 Subject: [Elecraft] K3 - how to CONFIG without VFO B?
 
 

 I just received my K3 kit and love the radio already! I have a problem
 however... After about 1 hour of usage the VFO A encoder stopped working 
 for
 some strange reason. I swapped it for VFO B so it is definitely the 
 encoder
 and nothing else. But now I'm not able to use the menu or CONFIG since
 VFO 
 B
 is a must for this. Does anyone know if either N4PY or Ham Radio deluxe 
 will
 give me control of the CONFIG menu?

 A new encoder will be ordered on Monday of course but from Elecraft to
 Norway often takes more than a week (gasp!) :)

 73,
 Are - LB3SA
 KX1 - K2 - K3
 -- 
 View this message in context: 
 http://n2.nabble.com/K3---how-to-CONFIG-without-VFO-B--tp683139p683139.html
 Sent from the Elecraft mailing list archive at Nabble.com.

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 your desktop!
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 Elecraft web page: http://www.elecraft.com
 
 

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Re: [Elecraft] For Sale K1 4 bands with tuner

[WA5VFA]

Offer sent..



n4lq wrote:
 
 I am offering my K1 for sale. It is loaded with the following:
 K1-4. 4 bands 80, 40, 30 and 17 meters.
 KAT1 Internal automatic antenna tuner. Matches about anything.
 It is aligned and working perfectly. Looks new with no flaws. Non-smoking 
 enviroment.
 Cost for a new kit is $478.
 Selling this one for $375. Shipped CONUS.
 PayPal accepted.
 
 Steve Ellington
 [EMAIL PROTECTED] 
 
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[Elecraft] RE: Elecraft Digest, Vol 52, Issue 14

[Mike Kirchoff]

To subscribe or unsubscribe via the World Wide Web, visit
http://mailman.qth.net/mailman/listinfo/elecraft

This link should get you going on the Elecraft Reflector.

Mike





-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Saturday, August 09, 2008 4:04 AM
To: elecraft@mailman.qth.net
Subject: Elecraft Digest, Vol 52, Issue 14

Send Elecraft mailing list submissions to
elecraft@mailman.qth.net

To subscribe or unsubscribe via the World Wide Web, visit
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or, via email, send a message with subject or body 'help' to
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You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than Re: Contents of Elecraft digest...


Today's Topics:

   1. Re: K3 AGC Settings Tutorial (Tom W8JI)
   2. RE: K3 Microhpone (Charles Harpole)
   3. Re: K3 Microhpone (Fern Rivard)
   4. Re: Re: K3 Audio (Leigh L. Klotz, Jr WA5ZNU)
   5. K3 - My turn (Jim Miller)
   6. Re: K3 Microhpone (Gary Gregory)
   7. K3/100 #282 -- KRX3 and KXV3 (vu2nks)


--

Message: 1
Date: Sat, 9 Aug 2008 00:19:16 -0400
From: Tom W8JI [EMAIL PROTECTED]
Subject: Re: [Elecraft] K3 AGC Settings Tutorial
To: elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original

It is true that the AGC pertains to the radio and not the 
band, but the optimal AGC threshold setting does vary by 
band.  On 80m, for example, I set the AGC threshold on my 
Ten-Tec Orion at about 20uV.  On 10m, where the noise level 
is very low, I set it at 0.5uV. The Orion, incidentally, has 
fast, medium, and slow AGC settings, plus a custom prog 
setting, and one can set the threshold, decay rate and hang 
time independently for each speed. It is possible to spend 
hours fiddling with the Orion's AGC settings.

One of the reasons you have to change it so much is any AGC 
that has no effect at all until a threshold and then tips in 
all at once is always critical to adjust. A good AGC system 
has a slope rather than a hard threshold with no AGC at all 
below a point, and then hard AGC after that point that 
clamps the volume to one level.

At quiet locations the dominant noise is propagated via 
skywave just like the desired signals. This means the noise 
floor varies greatly with direction depending on propagation 
or even the time of day. On the same band in different 
directions the noise floor can vary 10 or 20 dB. This 
requires constant adjustment of AGC threshold with any AGC 
that tips in fully at a threshold.

AGC systems with a slope don't exaggerate the problem of 
noise level changes and they don't muddy the signals into 
one constant level or no AGC at all.

When I solid stated my R4C's I built a new AGC circuit. I 
put a lot of gain in the AGC, there was very little audio 
level change with input signal level change. On the bench it 
was nearly perfect, once the AGC started working everything 
stayed at nearly the same audio level. I worked to make it 
have flat audio level with varying signal levels, textbook 
perfect AGC.

Everyone hated it. It required constant riding of RF gain. 
It made weak DX stations near noise floor muddy up or 
vanish, and it was impossible to sort signals close in pitch 
in pileups.

Decreasing the gain in the AGC circuit cured it, and it was 
no longer necessary to ride the RF gain (same as adjusting 
AGC threshold).

The K3 has an AGC SLP adjustment that cures this problem. I 
was delighted to see the people at Elecraft included an AGC 
slope adjustment, and that it works to make the AGC have 
that analog sound operators here like for handling pileups 
and for weak signals in rough noise. Unless you have an old 
analog AGC system the slope adjustment is a must have 
requirement. Especially for people who work pileups or work 
DX that is in and out of rough noise like static crashes.

Although I just started using the K3, I really like the AGC 
system so far. That's in contrast to other digital AGC 
systems I quickly learned to *dislike*. Low band DXers or 
contesting people will really like the slope adjustment 
feature.

73 Tom






--

Message: 2
Date: Sat, 9 Aug 2008 04:23:05 +
From: Charles Harpole [EMAIL PROTECTED]
Subject: RE: [Elecraft] K3 Microhpone
To: elecraft@mailman.qth.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=iso-8859-1


Real serious hams use Heil headphone/mic set.

Ideally have the 5 and the 4 elements switchable as

in one model Heil sells.  All other discussions

of other choices are just for fun.  73


Charles Harpole

[EMAIL PROTECTED]









--

Message: 3
Date: Fri, 8 Aug 2008 22:34:19 -0600
From: Fern Rivard [EMAIL PROTECTED]
Subject: Re: 

[Elecraft] L3 Receive audio in CW

[K2ZLS]

Another idea to try is to reduce your Filter Gains back to 0.  I had 
mine at 4-5 thinking more was better.  When I reduced them I really 
didnt notice any reduced signal capability but, it calmed down the 
bacon sizzle.  I think it may have something  to do with the way 
Digital noise vs Analog noise is processed.  Maybe LYLE can comment 
better than I can.


73's   TonyK2ZLS

 
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[Elecraft] K3, PSK31 cables

[eaonj]

I am trying to use PSK31 Deluxe v3.4 in Ham Radio Deluxe with the K3 and have a 
basic question.  The cable from  LINE OUT jack of the K3 to headset input of 
laptop computer should have stereo plug at each end?  The cable from LINE IN 
jack of K3 to mic input of laptop computer should have a mono-plug at each end? 
 I cannot see any signals in the lower grid of the display.

I set MIC SEL to Line IN, Mode to Data A.

Gene, W2BXR
K3, 1188
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Re: [Elecraft] K2 power setting for SSB QRP?

[TF3KX]

Thanks, everyone.  I am still working on the presumption that 5W output for
CW and 10W PEP output for SSB would be acceptable for my purposes of award
gathering and contesting, as I already pointed out in my initial post.  I
justify this even further with the fact that my antennas are mediocre at
best, typically random wires or a temporary dipole at best.

But my question was specifically on the K2 and how it controls its output
power.  So, again, I presume the K2/KAT2 power regulating circuitry
guarantees that:

- if I set my power level at 5W my CW key-down output power will actually be
5W
- if I set my power level at 10W my SSB PEP output power will actually be
10W (avg power somewhat less)

...or relatively close to this.  Right?

73 - Kristinn, TF3KX



hank  k8dd wrote:
 
 - Original Message - 
 From: David Yarnes [EMAIL PROTECTED]
 To: Ron D'Eau Claire [EMAIL PROTECTED]; elecraft@mailman.qth.net
 Sent: Saturday, August 09, 2008 9:20 AM
 Subject: Re: [Elecraft] K2 power setting for SSB QRP?
 
 
 Most QRP contests have a QRP limit of 5 watts for both CW and SSB.  I
 know 
 the ARRL does that.  ARCI, and I think GQRP, had QRP on SSB limited to 10 
 watts, I think in an attempt to account for the disparity between the two 
 modes
 
 
 QRP-ARCI defines QRP as:
 
 QRP operation for QRP-ARCI purposes is defined as operation with a 
 transmitter power output of 5 watts or less (CW)(A1) and 10 watts PEP or 
 less (SSB)(A3J). QRP-ARCI awards are based on these output levels.
 
 .
 I believe most other QRP organizations agree with this, although there are 
 some groups / contests that specify that SSB QRP is 5 watts (or less)
 output 
 on all modes.  As far as I know, no one uses the well discussed (and 
 sometimes over discussed!) use of ERP in QRP power levels.
 
 72  73HankK8DD 
 
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[Elecraft] K3-100 Kit #1433 Up and Running

[Jack Regan]

Got the kit late yesterday and at 2100Z today made my first qso.

 

The build was easy, the configuration was confusing!  

 

Going to have some breakfast, take a nap and then enter the SKCC WES today!

Hope to hear you all on the air!  SKCC membership is not a requirement!

 

Jack, AE6GC, KX1 1403, K3 1433

 

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Re: [Elecraft] K3, PSK31 cables

[Lyle Johnson]

...The cable from
 LINE OUT jack of the K3 to headset input of laptop...


The LINE OUT of the K3 goes to LINE IN on the computer (or mic in).

LINE OUT (or headphone out) of the ocmputer goes to LINE IN on the K3.

73,

Lyle KK7P

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RE: [Elecraft] K2 power setting for SSB QRP?

[Ron D'Eau Claire]

Yep! The K2 power monitor monitors peak power, which most QRP awards say
should be no more than 10 watts peak envelope power (PEP) in SSB. 

Your average power will be less, depending upon the amount of speech
compression you select in the MENU. More compression will produce greater
average output power. That's the whole point of compression.

I'm not aware of any limits on compression or speech processing placed on
eligibility for SSB QRP awards, just PEP.

Ron AC7AC


-Original Message-
Thanks, everyone.  I am still working on the presumption that 5W output for
CW and 10W PEP output for SSB would be acceptable for my purposes of award
gathering and contesting, as I already pointed out in my initial post.  I
justify this even further with the fact that my antennas are mediocre at
best, typically random wires or a temporary dipole at best.

But my question was specifically on the K2 and how it controls its output
power.  So, again, I presume the K2/KAT2 power regulating circuitry
guarantees that:

- if I set my power level at 5W my CW key-down output power will actually be
5W
- if I set my power level at 10W my SSB PEP output power will actually be
10W (avg power somewhat less)

...or relatively close to this.  Right?

73 - Kristinn, TF3KX


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Re: [Elecraft] VFO indepence

[David Wilburn]

This is the most frustrating issue I have experienced with the K3.  I 
really enjoy the rig, and this is the only nit I have experienced.  I 
would like to be able to (during contests) pop over to other bands, 
listen for a moment and pop back.  But this is not available at this time.


The release notes mention the following:
TUNING EITHER VFO ACROSS MULTIPLE BANDS now brings the other VFO along 
 with it, so that both VFOs will always be on the same band. This 
eliminates the problem of bands getting out of sequence due to wide 
tuning excursions. (Later, we’ll allow the subreceiver to be on a 
different band from main if CONFIG:VFO IND is enabled.)


Tech support has indicated that this _may_ be something that is 
addressed in a future firmware release.  Time will tell.


For now, I am going to try and get a second antenna setup, and get the 
K2 back online.  Then I can use it as a second receiver.  My 
frustration was really notched up when I was able to split the VFO's 
on a 706MIIG in the vehicle, but cannot do it on the K3.


For now, I continue to enjoy the awesome radio, and wait to see what 
happens.


David Wilburn
K4DGW

Eric wrote:



Hi,


I'm not able to force CONFIG:VFO IND to yes. When I try, the LCD shows: 
NO SUB, the KRX3 is working fine


It's supposed to be possible to set the sub receiver to a different band 
from the main this way, but I can't get it to work.




Any ideas?


vy 73 Eric PA3CEV


K2 960
K3 122

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Re: [Elecraft] K3 Audio

[Julian, G4ILO]

Joe Subich, W4TV-3 wrote:
 
 There is still a bit of a problem on receive audio.  This has 
 been there for some time and exists in the form of harmonics. 
  The 3rd harmonic is quite easy to see and repeatable.  I 
 used HRD to show this on the waterfall after a conversation 
 with a friend. You can clearly see the harmonic at..
 
 You are overdriving your sound card or the line out transformer 
 in the K3.  
 
 I have measured the third harmonic using an audio spectrum analyzer
 at both the line out and headphone jacks of my K3.  Until the level 
 becomes excessive ( .7V RMS on the Line Out) the third harmonic is 
 more than 50 dB down (Line Out) and more than 70 dB down (headphones).  
 
 

I have just observed this for myself. A fellow K3 owner who has been testing
my KComm program persuaded me to try CW Skimmer. With the large very clear
horizontal waterfall it is very easy to see duplicate signals occurring at
harmonically related intervals. I have to reduce the LIN OUT setting to 002
for it to completely disappear. The mixer volume sliders have no effect on
these harmonics.

I don't have an oscilloscope so I can't be sure if the problem is occurring
in the K3 or the input to the sound card. Skimmer seems happy at the low
setting, but it is too low for my PSK31 software.

-
Julian, G4ILO
http://www.g4ilo.com/ G4ILO's Shack 
http://www.ham-directory.com/ Ham Directory 
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View this message in context: http://n2.nabble.com/K3-Audio-tp673868p683362.html
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[Elecraft] K3 #1255 breathes

[Arie Kleingeld PA3A]

All,

Building the K3 was staight forward. No problems encountered.
Config was easy ( I read the manual during my holidays before I started
building this weekend).

One 100W PA to go... Will do that tomorrow or otherwise next Monday
evening or so. Now far too busy listening the CW contest. Excellent
receiver by all means.

73,
Arie PA3A

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[Elecraft] NAQCC Sprint Tuesday night!

[NAQCC]

NAQCC Sprint Tuesday night!
This coming Tuesday evening will be the monthly NAQCC Sprint for August, 2008.

I will refer you to the proper URL:

http://www.arm-tek.net/~yoel/sprint200808.html

There you will find all the details as to time, frequencies and also a special 
prize (a classic book in Morse on CD donated by Chuck Adams K7QO).

This month's Special Award goes to the winner of a drawing among the following: 
The member in each division who makes the highest score and uses a vintage 
straight key.

This is a monthly event that caters to the CW veteran, the CW newcomer, 
straight key and bug fans. All are welcome to participate (this includes QRO); 
but you must use QRP power levels to compete for awards.

Come join us and have a real good time!

73 de Dave VA3RJ
NAQCC #0004

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Re: [Elecraft] K3 Auto Tuner

[Tom Childers, N5GE]

On Fri, 08 Aug 2008 15:33:21 -0700, Eric Swartz - WA6HHQ, Elecraft
[EMAIL PROTECTED] wrote:

It already works on receive. Its in-line for both TX and RX. If you have 
tuned it up for a band it will be beneficial in RX too.

OF course, if you wish to tune it outside the Ham bands yo will need to 
adjust it in manual mode via the menu.

73, Eric  WA6HHQ
[snip]

Eric,

When the tuner is in bypass mode and the rig is out of an amateur band does the
previous tuner setting have any effect on the received signal?

When I QSX SW bands I do it with an 80m loop connected to the ANT port.  It
works great!

Tom

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Re: [Elecraft] K2 power setting for SSB QRP?

[Don Wilhelm]

Kristinn,

If you have properly calibrated the wattmeter (balanced it according to 
the manual and made the R1 adjustment with respect to a known good power 
meter), then yes the peak power developed by the K2 should be equal to 
the power setting.  The accuracy is only as good as the external meter 
used when calibration the KAT2.


73,
Don Wilhelm

TF3KX wrote:

Thanks, everyone.  I am still working on the presumption that 5W output for
CW and 10W PEP output for SSB would be acceptable for my purposes of award
gathering and contesting, as I already pointed out in my initial post.  I
justify this even further with the fact that my antennas are mediocre at
best, typically random wires or a temporary dipole at best.

But my question was specifically on the K2 and how it controls its output
power.  So, again, I presume the K2/KAT2 power regulating circuitry
guarantees that:

- if I set my power level at 5W my CW key-down output power will actually be
5W
- if I set my power level at 10W my SSB PEP output power will actually be
10W (avg power somewhat less)

...or relatively close to this.  Right?

73 - Kristinn, TF3KX



hank  k8dd wrote:
  
- Original Message - 
From: David Yarnes [EMAIL PROTECTED]

To: Ron D'Eau Claire [EMAIL PROTECTED]; elecraft@mailman.qth.net
Sent: Saturday, August 09, 2008 9:20 AM
Subject: Re: [Elecraft] K2 power setting for SSB QRP?




Most QRP contests have a QRP limit of 5 watts for both CW and SSB.  I
know 
the ARRL does that.  ARCI, and I think GQRP, had QRP on SSB limited to 10 
watts, I think in an attempt to account for the disparity between the two 
modes
  

QRP-ARCI defines QRP as:

QRP operation for QRP-ARCI purposes is defined as operation with a 
transmitter power output of 5 watts or less (CW)(A1) and 10 watts PEP or 
less (SSB)(A3J). QRP-ARCI awards are based on these output levels.


.
I believe most other QRP organizations agree with this, although there are 
some groups / contests that specify that SSB QRP is 5 watts (or less)
output 
on all modes.  As far as I know, no one uses the well discussed (and 
sometimes over discussed!) use of ERP in QRP power levels.


72  73HankK8DD 


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[Elecraft] Looking for a Clean K1 + Accessories

[wa5vfa]

I  owned a pair of K1’s, a KX1 and a K2 but sold them several years ago.
Lately a buddy helped me string a pretty decent long-wire antenna in the
attic.

Due to limited space and funds I have decided a K1 will fill the bill
nicely and hope that there might be someone here who has a clean one for
sale. I prefer one fully loaded but will consider whatever you may have. And
no, I don’t want to build one this time, just want one to tinker with on the
weekends.

You may email me at [EMAIL PROTECTED]

Thanks  73,
Ron WA5VFA

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[Elecraft] New K3 and KRX3

[N2TK]

Santa came again this year. K2 #1435 arrived and so did the KRX3 for #311.
73,
N2TK, Tony
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[Elecraft] K3: ERR TXF help with info

[Dave]

Hi-
 On SB the rig works correctly. On FM and AM when I trigger the VOX I get the 
ERR TXF message. 
 I have a K3 with 12, 2.7, 500, 200 filters beginning at slot 1.
CW, Data, AM and SSB modes  are set for FLTX FL2; FM is set for FLTX FL1.
FL1 is set to ON for FM; FL2, 3 and 4 are on for other modes.
FL5 is always set to OFF. FM mode is set to ON.

 I have tried setting the AM filters both to FL5 (OFF) since I don't have the 
AM filter... that didn't help.
 I have powered the rig off after setting the filter parameters, and I have 
made sure I am in an allowable band segment for each mode. (That is old 
thinking, but good!)
 Any ideas?
Thanks for the help.
73 de Dave [EMAIL PROTECTED]
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Re: [Elecraft] K3: ERR TXF help with info

[Lyle Johnson]

...On FM and AM when I trigger the VOX I get the ERR TXF message. 
 I have a K3 with 12, 2.7, 500, 200 filters beginning at slot 1.


The FM filter in slot 1 must be set to 13.0.

I am uncertain if AM Tx is supported with any filter other than 6 kHz at 
the moment.


73,

Lyle kK7P

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[Elecraft] RE: New K3 Power output problem

[Eric Swartz - WA6HHQ, Elecraft]

Oops! Yes, the jumpers have to be temporarily replaced while the kxv3 is out. 
You should then get RF.

Eric
_..._
-Original Message-
From: Barry Simpson [EMAIL PROTECTED]
Date: Saturday, Aug 9, 2008 6:18 pm
Subject: RE: New K3 Power output problem
To: 'Eric Swartz - WA6HHQ, Elecraft' [EMAIL PROTECTED]

  
Hi Eric 
  
Thanks for your very quick response. 
  
I have removed the KXV3. It does indeed have the 14704 sticker and Q1 is 
marked 7AW so that is obviously the problem. 
  
You are quite right. The power issue first surfaced at the 50W TX gain 
calibration when the actual output was about 70W.  
  
Having reassembled the K3 and set the KXV3 option to not installed I now get no 
power out at all. Is this because of jumpers W1 and W2 being removed as part of 
the KXV3 installation ? When I engage tune I get the ERR TXG message. 
  
No great dramas if the replacement KXV3 board will put everything right. 
However I should appreciate your feedback as to whether the K3 should now in 
fact be generating RF. 
  
Best regards 
  
Barry Simpson  VK2BJ 
  
 

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Re: [Elecraft] K2 power setting for SSB QRP?

[Tom W8JI]

- if I set my power level at 5W my CW key-down output 
power will actually be

5W
- if I set my power level at 10W my SSB PEP output power 
will actually be

10W (avg power somewhat less)

...or relatively close to this.  Right?



If SWR is very good.

To get the true power with a load mismatch you have to 
subtract reflected power from forward power.




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Re: [Elecraft] a wish for a balance control

[KBG Luxford]

I think that there was a QST article some years ago regarding an audio 
filter/equaliser tailored to match one's hearing loss profile.  The 
author claimed that it enabled him to hear his radio much more clearly.


My hearing is largely deficient in the higher frequencies due to army 
weapons training in my youth and no doubt exacerbated by subsequent 
industrial noise.  This is likely to be a problem that affects a good 
proportion of list members.  Loss of the higher frequencies means that 
we miss the word endings which convey a high proportion of the 
intelligence we are trying to receive.  Maybe, just maybe, the want of 
'good' audio on K3s is due to a wish to be able to hear more clearly?  
Maybe the article in QST to which I am referring would be a good way to go.


I will see if I can find it and post the details to the list.

73
Kevin
VK3DAP / ZL2DAP

Jim Wiley wrote:

Charles -


I purchased a set of Radio Shack headphones a few years ago that had 
separate level controls for each ear.  They were reasonably priced, 
very comfortable, and sounded great.


You might want to have  a look at what they are offering today. Their 
web site shows a  pair by Coby for only $11.00 that has independent 
controls  R/S Cat Num 55010925. 

They also have another set that looks a bit better quality, and has a 
volume control, but I can't tell if each side is independently 
adjustable, for $13.00 .   Their Cat Num 55010865.   The usual 
disclaimers apply.



- Jim, KL7CC



Charles Harpole wrote:

As a guy with frequent ear problems, I wish rigs had a

balance control which puts more AF juice into one

side of the headphones compared to the other.

Age-ing hams  can wish  73

Charles Harpole

[EMAIL PROTECTED]


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[Elecraft] KX1 Help

[Paul Gates, KD3JF]

What can I do to get more output on my KX1 on 20 meters?... Would
like more than 1.5 to 2 watts. Am using 13.5 V battery.

Paul Gates, KD3JF



  
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Re: [Elecraft] a wish for a balance control

[Lyle Johnson]

I think that there was a QST article some years ago regarding an audio 
filter/equaliser tailored to match one's hearing loss profile.  The 
author claimed that it enabled him to hear his radio much more clearly.


This is part of the reason for the 8-band equalizer in the K3 receiver. 
 YOu can tailor the audio response to match your situation.  What is 
currently lacking is a way to adjust the relative levels of right and 
left channel.


But, it is as they say, only a small matter of programming :-)

73,

Lyle KK7P

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Re: [Elecraft] a wish for a balance control

[Tom Childers, N5GE]

On Sun, 10 Aug 2008 13:19:03 +1000, KBG Luxford [EMAIL PROTECTED] wrote:

I think that there was a QST article some years ago regarding an audio 
filter/equaliser tailored to match one's hearing loss profile.  The 
author claimed that it enabled him to hear his radio much more clearly.

My hearing is largely deficient in the higher frequencies due to army 
weapons training in my youth and no doubt exacerbated by subsequent 
industrial noise.  This is likely to be a problem that affects a good 
proportion of list members.  Loss of the higher frequencies means that 
we miss the word endings which convey a high proportion of the 
intelligence we are trying to receive.  Maybe, just maybe, the want of 
'good' audio on K3s is due to a wish to be able to hear more clearly?  
Maybe the article in QST to which I am referring would be a good way to go.

I will see if I can find it and post the details to the list.

73
Kevin
VK3DAP / ZL2DAP

[snip]

My CW operation statistics show above 90% CW operation.

I find that when working CW my hearing loss helps me if I set the CW pitch at
400 to 450 cycles.  In fact I had my audiologist adjust the fourth setting on my
hearing aids to a 500 cycle peak, so I don't have to remove them when working
CW.

With phone I set them on speech.

73,

Tom, N5GE - SWOT 3537 - Grid EM12jq

Those who would give up 
Essential Liberty to 
purchase a little Temporary 
Safety deserve neither 
Liberty nor Safety 

An excerpt from a letter 
written in 1755 from the 
Assembly to the Governor 
of Pennsylvania.

Support the entire Constitution, not 
just the parts you like.

http://www.n5ge.com
http://www.eQSL.cc/Member.cfm?N5GE

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Re: [Elecraft] a wish for a balance control

[KBG Luxford]

I found the article.

Look at QST Jan 2005 p28, Hal Kennedy, N4GG, An Audio Intelligibility 
Enhancer.


I am waiting to get a round tuitt.

73
Kevin
VK3DAP / ZL2DAP

Jim Wiley wrote:

Charles -


I purchased a set of Radio Shack headphones a few years ago that had 
separate level controls for each ear.  They were reasonably priced, 
very comfortable, and sounded great.


You might want to have  a look at what they are offering today. Their 
web site shows a  pair by Coby for only $11.00 that has independent 
controls  R/S Cat Num 55010925. 

They also have another set that looks a bit better quality, and has a 
volume control, but I can't tell if each side is independently 
adjustable, for $13.00 .   Their Cat Num 55010865.   The usual 
disclaimers apply.



- Jim, KL7CC



Charles Harpole wrote:

As a guy with frequent ear problems, I wish rigs had a

balance control which puts more AF juice into one

side of the headphones compared to the other.

Age-ing hams  can wish  73

Charles Harpole

[EMAIL PROTECTED]


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Re: [Elecraft] a wish for a balance control

[KBG Luxford]

Sorry for the bandwidth, but if you want a copy of the article, send me 
an email.


Kevin

Jim Wiley wrote:

Charles -


I purchased a set of Radio Shack headphones a few years ago that had 
separate level controls for each ear.  They were reasonably priced, 
very comfortable, and sounded great.


You might want to have  a look at what they are offering today. Their 
web site shows a  pair by Coby for only $11.00 that has independent 
controls  R/S Cat Num 55010925. 

They also have another set that looks a bit better quality, and has a 
volume control, but I can't tell if each side is independently 
adjustable, for $13.00 .   Their Cat Num 55010865.   The usual 
disclaimers apply.



- Jim, KL7CC



Charles Harpole wrote:

As a guy with frequent ear problems, I wish rigs had a

balance control which puts more AF juice into one

side of the headphones compared to the other.

Age-ing hams  can wish  73

Charles Harpole

[EMAIL PROTECTED]


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[Elecraft] K3's 2nd receiver on different band?

[Ken Kopp]

I may have stumbled onto an uh-oh ... for me anyway.

I was about to order a 2nd receiver for the sole purpose
of monitoring a -different- band (6M) while using the K3
on a different band/mode.  Can I do this?  I was under
the impression that one can do this, but recent postings
about VFO's make me think I was incorrect 

Perhaps I'm reading something incorrectly.

73! Ken Kopp - K0PP
[EMAIL PROTECTED]
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Re: [Elecraft] K3 Audio

[Jim Brown]

On Sat, 9 Aug 2008 15:27:08 -0700 (PDT), Julian, G4ILO wrote:

With the large very clear horizontal waterfall it is very easy to see 
duplicate signals occurring at harmonically related intervals. 

This is entirely consistent with my measurements. See the previously posted 
link. 

Jim K9YC



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[Elecraft] K3 w/Aluminum Spinner?

[Don Rasmussen]

Try this!

http://www.zerobeat.net/mediawiki/index.php/SpotLight_on_K3_by_wb8yqj

(alternate)

http://tinyurl.com/58qg5a
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[Elecraft] K3 K3/10 For Sale Best Offer

[John WA6YSY]

K3/10 For Sale.

Configuration:
* Basic K3/10, s/n: 81
* Filters: 200Hz/5 pole, 500Hz/5 pole, 2.7KHz/5 pole, 6KHz/8 pole
* KBPF3 General Coverage Module
* KUSB USB Cable
* Firmware version: MCU 2.22, DSP 1.88
* Super clean, non-smoker, assembled by RF Engineer/Tech
* Excellent condition...a 9.9 of 10. No scratches
* Includes all manuals and collection of relevant application notes.
* New K3 Nifty Manual included
* Will be double boxed and well packed

For Sale...Best Offer. Contact Off List please.

72/73, John WA6YSY in NW Washington.

-- 
View this message in context: 
http://n2.nabble.com/K3-K3-10-For-Sale-Best-Offer-tp683699p683699.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3's 2nd receiver on different band?

[Eric Swartz - WA6HHQ, Elecraft]

Hi Ken,

We fully intend to do this. Its a small matter of programming (SMOP).  :-)  In 
this case its a fair amount of work to enable this, but it is high up on our 
priority list.

73,

Eric
_..._
-Original Message-
From: Ken Kopp [EMAIL PROTECTED]
Date: Saturday, Aug 9, 2008 10:07 pm
Subject: [Elecraft] K3's 2nd receiver on different band?
To: elecraft@mailman.qth.net

I may have stumbled onto an uh-oh ... for me anyway.

I was about to order a 2nd receiver for the sole purpose
of monitoring a -different- band (6M) while using the K3
on a different band/mode.  Can I do this?  I was under
the impression that one can do this, but recent postings
about VFO's make me think I was incorrect 

Perhaps I'm reading something incorrectly.

73! Ken Kopp - K0PP
 [EMAIL PROTECTED]
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[Elecraft] Re: K3's 2nd receiver on different band?

[Dave G4AON]

Ken I think you will find the 2nd receiver picks up it's signal via the 
ATU and TX low pass filter, not having one I could only try working it 
out via the  schematics...


I have an external antenna splitter that could be used with a 6m pre-amp 
to feed a 2nd receiver, although again the ATU/LPF may be an issue 
depending on band combination. If you have the KXV3 you might want to 
try it and see if it works for what you need - it's a bit cheaper than a 
KRX3.


I have a couple of needs with my K3, (1) to improve the RX on 6m and 
(2) to run dual receive. The receiver performance is worse on 6m than my 
TS-480 by about 8 dBm and I sometimes struggle hearing weak signals on 
that. I bought an Advanced Receiver Research pre-amp type P50VDG 
(http://www.advancedreceiver.com/) and connect it between RX OUT and RX 
IN on the KXV3. It has quite a lot of gain but I didn't find it needed a 
10 dB fixed attenuator on the output, the K3 ATT works well enough. 
Being very low noise there isn't a high level of hash from it and it can 
be switched out of circuit easily by pressing the RX ANT button on the 
K3. The MDS in a 400 Hz bandwidth increased from -136 dBm to -146 dBm 
with the external pre-amp.


Regarding splitting the receiver signal to feed another receiver, in my 
case my K2 via it's RX only antenna input (part of the K160M add-on for 
the K2), an external ferrite splitter works well. It has 3 dB loss and 
around 20 - 30 dB isolation between output ports. Wire the splitter 
input from the KXV3 RF OUT, one output from the splitter goes to KXV3 RF 
IN, the other to the K2 RX antenna socket. The K2 can be muted by 
putting it to TEST, turning the power to minimum, sidetone to zero and 
t-r time of around 100 mS. Wire the KEY OUT from the K3 to the KEY IN of 
the K2 and now you have a 2nd receiver. The external receiver can be 
quietened by pressing the RX ANT button on the K3, in case of needing 
additional sensitivity on the K3 the RX ANT button can be used to bypass 
the splitter and remove the 3dB loss. Winding details of the ferrite 
splitter are on my K3 page at: http://www.astromag.co.uk/k3/


My K3/K2 combination is mostly used on 80m with the K2 monitoring the CW 
QRP frequency of 3560 and the K3 elsewhere on the same band.


73 Dave, G4AON
K3/100 #80, K2 #1892


I may have stumbled onto an uh-oh ... for me anyway.

I was about to order a 2nd receiver for the sole purpose
of monitoring a -different- band (6M) while using the K3
on a different band/mode. Can I do this? I was under
the impression that one can do this, but recent postings
about VFO's make me think I was incorrect 

Perhaps I'm reading something incorrectly.

73! Ken Kopp - K0PP
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