date:20080817


Bill and Paul,

Yes, all that is true.  The K2 9 pin connector is labeled "AUX I/O" - 
and that does *not* mean RS-232.  It does contain 2 RS-232 level signals 
(RXD and TXD), but also contains internal K2 signal lines.  Using a 
standard computer serial cable on the K2 will cause damage to your K2.


OTOH, you will find the K3 9 pin connector *is* labeled as RS-232, and 
one can safely connect a standard computer serial cable to the K3 - 
although the special cable made for a K2 will work to provide 
communications and firmware download with the K3.


In general - the DB/DE series of connectors are just that - they are 
connectors - they do not imply serail interfaces, parallel interfaces or 
anything like that.  Just because it looks like the serial connector on 
a computer does not mean that it is a serial connection.  Many pieces of 
equipment use these connectors for a variety of uses.  Know and 
understand your equipment, and do not make any assumptions based on 
'what the connector looks like' - doing so may be a very costly mistake.


73,
Don W3FPR

k7nhb wrote:

Bill,
Just a word of Caution - though the K3 can take a standard Serial cable -
I've read that the K2 CANNOT. If you plug a standard serial cable into a K2
you will Blow the I/O board. I mention that because when you mentioned your
K2 was at the lake cabin, it sounded like you thought the cables were
interchangeable. The K3 may work with the special K2 cable - I don't know
about that. But again, It's been posted that plugging an "off the shelf"
serial cable into a K2 (turned on of course) will destroy the I/O board.
Paul



NZ0T wrote:

In anticipation of my K3 arriving next week I'm tying to find the RS232
interface cable.  I'm going to be out of town a lot and pressed for
shopping time so I hope nobody minds my asking a dumb question.  Where can
I get the needed cable - Best Buy, Radio Shack, Wal-Mart?  My K2 will now
be at the lake cabin so that cable goes with it.

73,

Bill NZ0T




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Re: [Elecraft] K1 zero beating


Hank,

It is 'automatic' *after* you set up the K1 correctly.

Follow the instructions on the manual - first align the BFO so the 
center of the FL3 passband is at your preferred CW pitch.  Then move the 
switch on the bottom of the RF Board and adjust the transmit offset 
equal to the same pitch.


After that is done, tune your desired signal to your preferred CW pitch 
tone, then the transmit signal will be correct (and the dial will read 
the transmitted carrier frequency).


73,
Don W3FPR

Hank/KEoCU wrote:

K1 question. Is the passband (or center) frequency of the xtal filter
automatically the same as the sidetone pitch? If it is, than zerobeating a
station at any selected sidetone pitch should automatically center the cw
note in the filter (?). If not, what do you do? I guess I'm a little unsure
how to make sure I transmit and receive on the correct frequency with
respect to the narrow xtal filter passband. Please enlighten me! Thank you.

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[Elecraft] K-1 Final Output Transistor

2008-08-17 Thread Ron Ricketts

I'm wondering if there is a suitable replacement for the 2SC1969 output
transistor used in the K-1. This device is now obsolete and not readily
obtainable. It would be nice to have a device that would readily replace it
that is current and perhaps has a bit more gain and dissipation.

What have you tried that has worked?

Ron WA5VFA

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RE: [Elecraft] RS232 cable source

Paul's quite right. The K2 does *not* have an RS232 port while the K3 does. 

The three-wire cable used on K2s will work FB to connect a K3 to a computer
serial port for firmware updates, configuring filters using the utility
program, etc. As it happens, the K2's AUX IO connector uses the same pins
for the data communications as are used by an RS232 connection. I use my K2
AUX IO cable in just that way to hook the K3 to my computer RS232 port.  

But do not connect a standard RS232 cable to a K2's "AUX IO" connector, even
though the connectors mate. The other connections in a standard RS232
connector are not compatible with the K2's AUX IO interface and you can
damage your K2. 

Ron AC7AC

-Original Message-

Bill,
Just a word of Caution - though the K3 can take a standard Serial cable -
I've read that the K2 CANNOT. If you plug a standard serial cable into a K2
you will Blow the I/O board. I mention that because when you mentioned your
K2 was at the lake cabin, it sounded like you thought the cables were
interchangeable. The K3 may work with the special K2 cable - I don't know
about that. But again, It's been posted that plugging an "off the shelf"
serial cable into a K2 (turned on of course) will destroy the I/O board.
Paul

NZ0T wrote:
> 
> In anticipation of my K3 arriving next week I'm tying to find the
> RS232 interface cable.  I'm going to be out of town a lot and pressed 
> for shopping time so I hope nobody minds my asking a dumb question.  
> Where can I get the needed cable - Best Buy, Radio Shack, Wal-Mart?  
> My K2 will now be at the lake cabin so that cable goes with it.
> 
> 73,
> 
> Bill NZ0T
> 

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Re: [Elecraft] RS232 cable source

2008-08-17 Thread NZ0T


Thanks Paul and yes I do know that the K2 cannot use a standard serial cable. 
The K3 can use the K2 cable from what I have been able to gather.

k7nhb wrote:
> 
> Bill,
> Just a word of Caution - though the K3 can take a standard Serial cable -
> I've read that the K2 CANNOT. If you plug a standard serial cable into a
> K2 you will Blow the I/O board. I mention that because when you mentioned
> your K2 was at the lake cabin, it sounded like you thought the cables were
> interchangeable. The K3 may work with the special K2 cable - I don't know
> about that. But again, It's been posted that plugging an "off the shelf"
> serial cable into a K2 (turned on of course) will destroy the I/O board.
> Paul
> 
> 
> 
> NZ0T wrote:
>> 
>> In anticipation of my K3 arriving next week I'm tying to find the RS232
>> interface cable.  I'm going to be out of town a lot and pressed for
>> shopping time so I hope nobody minds my asking a dumb question.  Where
>> can I get the needed cable - Best Buy, Radio Shack, Wal-Mart?  My K2 will
>> now be at the lake cabin so that cable goes with it.
>> 
>> 73,
>> 
>> Bill NZ0T
>> 
> 
> 

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Re: [Elecraft] RS232 cable source

2008-08-17 Thread k7nhb

Bill,
Just a word of Caution - though the K3 can take a standard Serial cable -
I've read that the K2 CANNOT. If you plug a standard serial cable into a K2
you will Blow the I/O board. I mention that because when you mentioned your
K2 was at the lake cabin, it sounded like you thought the cables were
interchangeable. The K3 may work with the special K2 cable - I don't know
about that. But again, It's been posted that plugging an "off the shelf"
serial cable into a K2 (turned on of course) will destroy the I/O board.
Paul

NZ0T wrote:
> 
> In anticipation of my K3 arriving next week I'm tying to find the RS232
> interface cable.  I'm going to be out of town a lot and pressed for
> shopping time so I hope nobody minds my asking a dumb question.  Where can
> I get the needed cable - Best Buy, Radio Shack, Wal-Mart?  My K2 will now
> be at the lake cabin so that cable goes with it.
> 
> 73,
> 
> Bill NZ0T
> 

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[Elecraft] K1 zero beating

2008-08-17 Thread Hank/KEoCU


K1 question. Is the passband (or center) frequency of the xtal filter
automatically the same as the sidetone pitch? If it is, than zerobeating a
station at any selected sidetone pitch should automatically center the cw
note in the filter (?). If not, what do you do? I guess I'm a little unsure
how to make sure I transmit and receive on the correct frequency with
respect to the narrow xtal filter passband. Please enlighten me! Thank you.
-- 
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[Elecraft] K3 PSK Success above the noise

2008-08-17 Thread Jim Benson

I just finished my first PSK31 contact using my K3 and the LIN IN/LIN  
OUT via VOX.


For those who have doubts about the NR, NB, AGC, etc., proof is in the  
results.  I live in a brick and steel Faraday cage.  It is impossible  
to use anything here but a mag loop for an antenna.  The building  
noise is simply overwhelming.(LCD tv, dsl, cable modems, wall warts,  
flickering mercury hall lights,)  About the only source of noise I  
don't have here in the city is an electric fence charger.


Till now I have been content going outside and working picnic table  
portable with an IC-703.


The K3 means I can have an indoor radio with real ears.

Thanks Altos keep on doing the voodoo you do so well.  My K3 mojo is  
working.


I really appreciate the opportunity to play at the developing edge  
which you make possible by quickly releasing code which is so simple  
to load and if need be simple to revert.



Jim

NS5U/1


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RE: [Elecraft] little OT: sweating the details [END of thread]

2008-08-17 Thread Eric Swartz - WA6HHQ, Elecraft

Let's also end this thread now..  Please, no more posts on this topic.

Also, as a general statement, ALL levels of technical questions are encouraged 
on the Elecraft reflector. Asking a question is a great way to learn more about 
this great hobby. Putting down those who dare to ask a question or those who 
might risk making an incorrect or uninformed statement is inappropriate.  

Its perfectly OK to correct technical mis-statements and to argue technical 
details, but it is not OK to personally put down others on the list (either 
directly or via indirect statements.) We want to encourage the free discussion 
of technical topics. 

73,

Eric  WA6HHQ
Elecraft List Moderator
_..._
-Original Message-
From: "Ron D'Eau Claire" <[EMAIL PROTECTED]>
Date: Sunday, Aug 17, 2008 9:08 am
Subject: RE: [Elecraft] little OT: sweating the details
To: "'Charles Harpole'" <[EMAIL PROTECTED]>,"'Stewart Baker'" <[EMAIL 
PROTECTED]>,"'Ken K3IU'" <[EMAIL PROTECTED]>
CC: "'Elecraft Reflector'" 

Ha, ha! You are quite right Charles. In the 1950's a great many Hams looked 
askance at anyone operating a factory built rig. "Appliance Operator" was a 
highly pejorative term more often whispered about someone than spoken aloud in 
polite company. 

I believe the lack of chirps, clicks and poorly modulated phone signals on the 
bands today is a warning sign. Not enough Hams are tinkering, playing and 
learning how to build rigs or how the rig they have works. 

Worse, those signals are so rare these days there are some Hams who think they 
should be illegal. 

That is truly disturbing. 

Much of what I learned the first few years on the air came from fellow Hams who 
patiently answered my questions and made suggestions. I try to repay them in a 
small way by taking the time to answer questions and encourage others today. 

Ron AC7AC 



-Original Message-

Every now and then, I read every message placed

on several ham radio reflectors.  I am astonished at

1. the high level of detail that some hams worry about and

2.  the low level of basic knowledge that the ham test should

have caught and finally

3. the seeming unwillingness to just go ahead and try something

instead of asking "permission" from "those who know more" (see

the quote marks?)

73


Charles Harpole

[EMAIL PROTECTED]

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Re: [Elecraft] no Sat delivery [END of Thread]

2008-08-17 Thread Eric Swartz - WA6HHQ, Elecraft

Let's end this thread in an attempt to relieve list email overload. Its way off 
topic.

73, 

Eric
Elecraft List Moderator.
_..._
-Original Message-
From: "S Sacco" <[EMAIL PROTECTED]>
Date: Sunday, Aug 17, 2008 6:44 am
Subject: Re: [Elecraft] no Sat delivery
To: "Charles Harpole" <[EMAIL PROTECTED]>
CC: elecraft@mailman.qth.net

Not once have I ever had any of those problems.

Must be that the gods are specifically mad at you, Chas.  ;-)

On Sun, Aug 17, 2008 at 8:58 AM, Charles Harpole <[EMAIL PROTECTED]> wrote:

> Have u noticed that it seems that always you

> get a notice of delivery  on a Friday afternoon

> that sez "delivery sked for next Monday"

> or that the store you need to shop at closes

> the very minute you get off work, or

> u get fired on a Friday afternoon and can

> not look for work until next Monday.

> Why is that?

>
 Charles Harpole

>
 [EMAIL PROTECTED]

>

>

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RE: [Elecraft] RS232 cable source

2008-08-17 Thread Dick Dievendorff

There is a description and a picture of an appropriate serial cable in the
K3 Utility Help under the index entry "cable".

I've found the several I have at small computer shops.  I just found one on
Radio Shack's Web Site  

http://www.radioshack.com/search/index.jsp?kwCatId=&kw=serial%20cable%20db-9
&origkw=serial%20cable%20db-9&sr=1

Go with a garden-variety 9-pin "straight thru" DB9 male to female cable of
an appropriate length.  You should prefer screws on the cable connectors so
that they can be fastened securely to the jack nuts that appear on the back
of the K3 and most PC DB-9 serial connectors.  

This is typically an inexpensive item, circa $5 to $15.  

73 de Dick, K6KR


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of NZ0T
Sent: Sunday, August 17, 2008 3:56 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] RS232 cable source


In anticipation of my K3 arriving next week I'm tying to find the RS232
interface cable.  I'm going to be out of town a lot and pressed for shopping
time so I hope nobody minds my asking a dumb question.  Where can I get the
needed cable - Best Buy, Radio Shack, Wal-Mart?  My K2 will now be at the
lake cabin so that cable goes with it.

73,

Bill NZ0T
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Re: [Elecraft] RS232 cable source


Bill,

Get yourself a standard computer serial cable - straight thru wiring. 
You do NOT want a null modem cable or a crossover cable.


The only signals that are required for K2 communications and firmware 
downloads are TXD and RXD (plus signal ground), but some applications 
also provide keying and PTT functions on the RTS and DTR signalling 
lines, and the K3 will respond to those if the cable has those lines 
present (the normal serial cable does have thes lines).


73,
Don W3FPR

NZ0T wrote:

In anticipation of my K3 arriving next week I'm tying to find the RS232
interface cable.  I'm going to be out of town a lot and pressed for shopping
time so I hope nobody minds my asking a dumb question.  Where can I get the
needed cable - Best Buy, Radio Shack, Wal-Mart?  My K2 will now be at the
lake cabin so that cable goes with it.

73,

Bill NZ0T

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Re: [Elecraft] (no subject)

2008-08-17 Thread WILLIS COOKE

We seem to have missed the October 1, 2007 sign up
date by 9 months already!

--- "Edward R. Breneiser" <[EMAIL PROTECTED]>
wrote:

> Hello all QRPers,
> 
> While this isn't a QRP Event, QRPers are encourged
> to enter!
> 
> This is an early announcement to all GORC Members to
> keep an eye or ear
> out for the GORC Iditarod 2009 Challenge! What is
> it? How do I enter it?
> What is the prize? Yes, many questions that will
> come soon.
> 
> What is it? -- It's a race around the world during
> the winter months on
> your "dog sled." The race will take place through
> the frozen parts of
> the world as you "mush" your way across the globe. 
> 
> Don't worry you won't have to actually race a dog
> sled, but you will
> have to make contacts around the world!
> 
> GORC Iditarod 2009 Challenge
> 
> Date: 11/01/08 to 03/31/09
> Bands: 80m, 40m, 20m, 15m, 10m
> Modes: SSB, CW, PSK31
> Power: 100w or less 
> 
> RACE COURSE:
> 1.Canada
> 2.Alaska
> 3.Russia
> 4.Finland
> 5.Sweden
> 6.Norway
> 7.Iceland
> 8.Greenland
> 
> All mushers MUST make one qso in each country in the
> proper order. No
> musher shall advance to the next station (country)
> without first
> contacting 1, then 2 then 3 etc. 
> 
> All mushers must sign up before October 1, 2007. No
> late entries will be
> allowed to mush. Your sled will be your radio and
> the power output you
> use. Your dogs will be your antennas! The more power
> you use, the
> heavier the sled and the less points you will
> receive for each contact.
> Heavy antennas mean heavy dogs and less points! You
> may stay at each
> station as long as you like and make contacts, but
> remember, this is a
> race and the earlier you finish the more points you
> will receive at the
> finish. Also any contacts made while you are
> portable count extra! You
> don't have to finish the course, but you'll loose
> lots of points.
> 
> All Mushers will receive a nice certificate upon
> FINISHING the course. 
> First Place will receive a beautiful ICE-Like
> Trophy! GORC Members are
> extra points! 
> 
> To enter all mushers must fill out an entry form
> that will soon be
> placed on the GORC Website
> http://www.wa3wsj.org/GORC.html
> 
> (I'll be busy preparing my dogs and sled) 
> 
> More details later!
> 72/73,
> Ed, WA3WSJ
> The Big GORC
> 
> 
> 
> 
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Re: [Elecraft] K2 Mods


DW,

Yes. I have a LOT of opinions!  I am glad to hear that you honor some of 
them!


For the Fixed Audio - yes, use the newer low profile board from Tom 
Hammond (see his website www.n0ss.net) and mount it between the front 
panel and the control board - then take the output to a spare microphone 
jack pin.  I do that by plugging it in at the microphone configuration 
header, but you can be creative about the method.  Remember to remove 
the mic configuration header jumper to the internal K2 circuitry.  While 
I say 'spare' mic pin, that is a dependency on your microphone wiring - 
all the pins could be connected at the mic configuration header to some 
circuits inside the K2.


Yes, the switchbox for digital modes can allow you just one cable to the 
K2 if you wire the audio output as above.  I have built a couple new 
versions, but all are basically the same.  You can mount transformers in 
the switchbox if you want isolation, but you might want to read what Jim 
Brown (of this reflector - see his recent posts) has to say about the 
benefit/non-benefit of transformers in the audio lines.


As far as defeating the SSB compression for data modes - there is a NEW 
way (compliments of Elecraft firmware).  Version 2.xx of the K2 firmware 
added a set of RTTY filters.  The most important item is that the RTTY 
mode has a compression setting independent of the setting used for SSB.
When setting up the RTTY filters, I set the FL1 position the same as SSB 
FL1 (using the OP1 filter), but the other 3 filters I set much more 
narrow - 1.00, 0.70 and 0.40 Hz, and center these narrow filters at 1000 
Hz.  In operation, if you tune with the VFO knob to place the desired 
signal near 1000 Hz (rather than just simply clicking with the mouse 
over a wide range) - when a strong station enters the passband near your 
desired station, you can just narrow the filter down and (hopefully) 
avoid the AGC pumping that is created by the strong unwanted station. 
Note: if you operate that way, you should lock the transmit frequency in 
the software before switching to a narrow filter to keep the QSO from 
walking the band due to slight changes in the BFO frequency from filter 
to filter. (you should not retune with the VFO - this time the mouse 
will do the tuning, but the transmit frequency should not change).


OK, now you have most everything I can say on that subject. Above all, 
have fun with it.


73,
Don W3FPR



DW Holtman wrote:

Hello,

I finally got around to installing the CW LED tuning indicator by Tom Hammond 
N0SS. It works great, I should have put it in way back when, upon completion of 
the K2. It is both sensitive to weak signals and selective.

Next I'm thinking about putting the Fixed Audio Output for digital modes 
created by Don Wilhelm W3FPR. It looks very well designed. Don has put a lot of 
time and effort into this project to design, build and document so everyone can 
read and understand it. Have many put this in and are you happy with the 
results? I'm a little nervous about drilling holes in the back panel.

Don also has a another project on his very informative web page. This is a 
switch box to make the connections from Digital modes to SSB without unplugging 
cables and changing the compression settings on the SSB Board. Has anyone built 
this and how do you like it? Would it be possible to combine the two. So a 
fixed audio would be applied to the mic plug to use in the switch box? This 
would also eleminate drilling the back panel?

I did not know if I should send this to Don, since he is the expert on most 
things related to the K2. But, I thought I would send it to the group for any 
ideas and hopefully Don will let everyone know what he thinks.

Best,
DW Holtman
Wb7SSN
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Re: [Elecraft] K3 noise blanker

2008-08-17 Thread S Sacco

Knut -

Regarding NR and DSP, check out the excellent (and WAY UNDERUTILIZED)
K3 forums and wiki at:
http://www.zerobeat.net/mediawiki/index.php/K3_DSP

73,
Steve NN4X



On Sun, Aug 17, 2008 at 5:03 PM, ab2tc <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> One of the main reasons for me buying the K3 was the demonstrated ability to
> eliminate pulse noise emanating from power lines and ignition noise (I
> listened to before/after audio clips demonstrating this on the web). The NB
> is very effective and does not distort signals at all unless they are
> really, really strong (S9+20dB++). I have never even tried the NR function -
> frankly I don't understand what it's supposed to do. Removing white noise
> from a signal is theoretically impossible and yet that's seems to be what
> the expectation of the NR is. Surprisingly most of the effectiveness of the
> NB on my pulse noise is coming from the DSP portion of the NB, although I
> use a combination of the two (setting t2-4,MED3), as suggested by many.
>
> Knut - AB2TC
>
>
> Stephen Prior wrote:
>>
>> This is a 'me too'.
>>
>> Having, in waiting for my K3, read all sorts of accolades for the NB and
>> NR,
>> I feel, now that I have the radio in front of me, somewhat deflated.  The
>> NB
>> is, it seems to me, no better than many others I have used (eg TS-850) and
>> the NR does not seem, to me at least, to be any better than that on the
>> TS-480 this K3 replaced.  And, I have experimented with all the various
>> settings available and am running the latest firmware.
>>
>> Having said that, I remain 95% delighted with the K3.  The strong signal
>> handling is fantastic, I like the ergonomics and the tx audio is simply
>> excellent.  I would not swap it for any other radio.  But, the NB and NR
>> have not lived up to my (maybe unrealistic) expectations.
>>
>> 73 Stephen G4SJP
>>
>>
>>
>
>
> -
> AB2TC - Knut
> --
> View this message in context: 
> http://n2.nabble.com/K3-noise-blanker-tp729039p729777.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
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[Elecraft] RS232 cable source

2008-08-17 Thread NZ0T


In anticipation of my K3 arriving next week I'm tying to find the RS232
interface cable.  I'm going to be out of town a lot and pressed for shopping
time so I hope nobody minds my asking a dumb question.  Where can I get the
needed cable - Best Buy, Radio Shack, Wal-Mart?  My K2 will now be at the
lake cabin so that cable goes with it.

73,

Bill NZ0T
-- 
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RE: [Elecraft] K3 noise blanker

2008-08-17 Thread Rob May

I received my K3 (#1417) Monday, had it on the air Tuesday.  I'm using a 
computer headset plugged into the the back of the radio with a foot switch to 
leave both hands free.  I hunt and pounced about 3 or 4 hours last night in the 
NAQP.  I was amazed at the NR and NB.  I have intermittent S9 power line noise 
here and I can eliminate that.  In addition, by playing with the NR setting and 
the AFX (a great feature that really does help on some signals) I was able to 
have clear copy on signals that I could barely tell were even there before.  I 
was so impressed that I went and got my wife to show her what it could do.  My 
other radio is a IC-718, so I'm comparing PC to a calculator, but still, very 
impressive.  I've using the latest beta firmware.

I have to say that the steep skirts of the 2.8 8 pole filter were worth the 
upgrade, it was great to be able to work stations that were less than 1 kHz 
apart.
Rob
NV5E

> Date: Sun, 17 Aug 2008 21:30:26 +0100
> Subject: Re: [Elecraft] K3 noise blanker
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; elecraft@mailman.qth.net
> CC:
>
> This is a 'me too'.
>
> Having, in waiting for my K3, read all sorts of accolades for the NB and NR,
> I feel, now that I have the radio in front of me, somewhat deflated. The NB
> is, it seems to me, no better than many others I have used (eg TS-850) and
> the NR does not seem, to me at least, to be any better than that on the
> TS-480 this K3 replaced. And, I have experimented with all the various
> settings available and am running the latest firmware.
>
> Having said that, I remain 95% delighted with the K3. The strong signal
> handling is fantastic, I like the ergonomics and the tx audio is simply
> excellent. I would not swap it for any other radio. But, the NB and NR
> have not lived up to my (maybe unrealistic) expectations.
>
> 73 Stephen G4SJP
>
>
> On 17/08/2008 20:45, "Bill W5WVO"  wrote:
>
>> Jim Brown wrote:
>>
>>> Yes, but what is NR and NB doing to signals you're trying to
>> copy?
>>> It's easy to fool yourself about how well it works when
>> listening
>>> ONLY to band noise. To be useful, the NB/NR must suppress the
>> noise
>>> while not doing too much damage to the signal you're trying to
>> copy.
>>> So far, I haven't been thrilled by what I hear of that.
>>
>> Have to agree with you on that, Jim. It's definitely a trade-off
>> between noise suppression and signal intelligibility. As with many
>> things, it works better on CW than it does on SSB.
>>
>> Once the major promised features of the K3 are in place (still
>> waiting for a fix for the SSB>CW VFO offset issue when changing
>> modes), I'm hoping the NB and NR code will be thoroughly
>> revisited.
>>
>> Bill W5WVO
>>
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[Elecraft] K2 Mods

2008-08-17 Thread DW Holtman

Hello,

I finally got around to installing the CW LED tuning indicator by Tom Hammond 
N0SS. It works great, I should have put it in way back when, upon completion of 
the K2. It is both sensitive to weak signals and selective.

Next I'm thinking about putting the Fixed Audio Output for digital modes 
created by Don Wilhelm W3FPR. It looks very well designed. Don has put a lot of 
time and effort into this project to design, build and document so everyone can 
read and understand it. Have many put this in and are you happy with the 
results? I'm a little nervous about drilling holes in the back panel.

Don also has a another project on his very informative web page. This is a 
switch box to make the connections from Digital modes to SSB without unplugging 
cables and changing the compression settings on the SSB Board. Has anyone built 
this and how do you like it? Would it be possible to combine the two. So a 
fixed audio would be applied to the mic plug to use in the switch box? This 
would also eleminate drilling the back panel?

I did not know if I should send this to Don, since he is the expert on most 
things related to the K2. But, I thought I would send it to the group for any 
ideas and hopefully Don will let everyone know what he thinks.

Best,
DW Holtman
Wb7SSN
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Re: [Elecraft] little OT: sweating the details + K3 RX Equalizer

2008-08-17 Thread Fred Jensen


Ron D'Eau Claire wrote:

Ha, ha! You are quite right Charles. In the 1950's a great many Hams looked
askance at anyone operating a factory built rig. "Appliance Operator" was a
highly pejorative term more often whispered about someone than spoken aloud
in polite company.


Well ... maybe there's another way to look at the changes from the "good 
old days."  In the 50's, the common ham station was a commercial or 
maybe surplus receiver [BC-348?] and a home brew or converted WW2 
surplus transmitter.  Very few people tinkered with their receiver ... I 
never had a 75A4 as a kid, but be assured, if I had had one, I wouldn't 
have gone into it with a hot soldering gun.  I did build and tinker with 
my transmitters, they were mainly converted surplus and a couple of home 
brew attempts, I was a teen and perennially broke.  My Dad bought me a 
surplus R-388 which I kept for many years.  He said the rest was up to me.


Transceivers pushed the separates out about the time SSB was coming on 
the scene.  If I had to credit one with being the BROTB [big radio on 
the block], I'd probably pick the KWM-1/2.  You still didn't take a hot 
soldering gun to the receiver part of your transceiver, and now, the 
transmitter part was integral to the radio and it did not experience the 
heat of a gun either.  Think for a moment ... do you have a stand-alone 
receiver in your shack that you'd go into?  A stand-alone transmitter? 
I might have an old ARC-5 transmitter in the basement, but it's probably 
missing the VFO capacitor.  The only stand alone receivers in our house 
are the TV's, and we have two stand alone radios in our vehicles.


Times changed.  All three of my Elecraft radios are transceivers.  I 
built the KX1 and K2, I "assembled" my K3.  I use them, I don't tinker 
with them.  I can't even see many of the parts in the K3 without the 
magnifier.  All of my HT's, and I have too many, are transceivers.  I 
don't think there's anything wrong with this set of circumstances.  I 
start my truck with a key into the steering column, sort of different 
than cranking it from under the radiator, and I like the key better. 
Times, and the things we use, just changed.  Ham radio is more fun for 
me now than when I listened with the R-388 and sometimes equally 
exciting.  We still tinker with antennas, interfaces between our radios 
and our laptop computers [who foresaw those things back in the 50's], 
and station setups and configuration.


I believe the lack of chirps, clicks and poorly modulated phone signals on
the bands today is a warning sign. Not enough Hams are tinkering, playing
and learning how to build rigs or how the rig they have works.

Worse, those signals are so rare these days there are some Hams who think
they should be illegal.


I had a job as a relief operator at a coastal marine station during my 
high school senior year.  I spent a lot of time listening to the "Holy 
Wavelength" [600m].  The quality of the signals was atrocious ... hum 
modulation beating with the MCW, clicks that would make an unmodified 
FT-1000 sound perfect, and chirp that would take the signal all the way 
out of the passband of todays' receivers -- not a problem in 1957, 
passbands were different then :-)  Fists were terrible, and those were 
the good ones.  You can find some 600m recordings on the I'net from 
those years, and as late as the 70's.  You'll be amazed if you remember 
what the ham bands sounded like at the same time.


I was also a ham of 3 years, and the vast majority of the signals in the 
ham bands were clean, well keyed, clickless, and chirpless.  Made me 
sort of proud to be a young ham.



Much of what I learned the first few years on the air came from fellow Hams
who patiently answered my questions and made suggestions. I try to repay
them in a small way by taking the time to answer questions and encourage
others today. 


That all still happens.  There's a young fellow down the road who is 
getting interested in the "magic of wireless."  I help him.


K3 RX Equalizer:  My hearing is shot, it disappeared one night 40+ years 
ago on a mountain top on the other side of the planet.  I have been 
hoping that the RX Eq might compensate enough to get me back onto SSB. 
Several folks have asked me to report on this, I've lost your email 
addresses, so I'll do it here.


NAQP SSB yesterday was the first test drive of my K3 on SSB.  I know 
what my hearing curve looks like, the VA gave me a copy.  I experimented 
trying to "invert" the curve with the EQ settings.  I finally found some 
settings that helped quite a bit.  16 dB isn't nearly enough range for 
me, but might be for someone with less hearing loss.  I tried faking it 
to 32dB by rolling the low frequencies [for which I still have some 
hearing] way down, and boosting the higher frequencies and then turning 
the AF gain way up, but that wasn't really too effective.


It's really a personal thing, and you just need to "tinker" with it 
some, but I'm reasonably

[Elecraft] New K2 owner.

2008-08-17 Thread edward kacura

Hi everyone,well I made a wish come true-found a K2,s/n5801 on ebay Fri for 
$600.00!It's a bare bones CW model,so I plan to add SSB,160 and 60 
meters,ATU,etc.I think I've made a good purchase here,from all my research here 
and other sites,this should be a great radio for a long time to come!Can't wait 
to recieve it now and get started,thanks for all the help from this thread.I 
also plan to keep it QRP,its the only way to go!!73 de Ed, N7EDK, Marana,Az.



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Re: [Elecraft] K2 SSB


Raimon,

I am pleased to hear you now have it working.
Yes, solder connections may be like that, particularly if the solder pad 
did not receive enough heat during the initial soldering.  No matter how 
good one's soldering skills are, it is always possible to be distracted 
and not to notice the point when the solder flows out onto the pad 
telling you that it is a good and complete connection.


73,
Don W3FPR

raimon wrote:

Dear Don
I thank you for the information.
Following your advice. I looked first for a bad solder in the KSB2 
module. As no poor solder was apparent, I decided to resolder all 
connections. After this re-work  the failure has been cured. The K27100 
in SSB mode is working again as it had been until recently.

I thought that my soldering skills were good enough, but I was wrong. Hi.
Many thanks for your help ¡¡¡
Best regards, 73
EA3EZO Raimon

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Re: [Elecraft] K3 noise blanker

Hi Knut,

Well interference is a very personal thing of course, and I suffer here from
power line noise too, especially when it is damp which is pretty much all of
the time.  Global warming does not seem to have reached the south western
tip of the UK yet- we've had the wettest, coldest summer wx for a long time
here!

The thing with the NB function is that it seems to take an awful lot of
effort in playing with settings to result in any tangible improvement and it
has only marginally helped with the power line noise problems despite lots
of such playing. 

73 Stephen G4SJP

On 17/08/2008 22:03, "ab2tc" <[EMAIL PROTECTED]> wrote:

> 
> Hi,
> 
> One of the main reasons for me buying the K3 was the demonstrated ability to
> eliminate pulse noise emanating from power lines and ignition noise (I
> listened to before/after audio clips demonstrating this on the web). The NB
> is very effective and does not distort signals at all unless they are
> really, really strong (S9+20dB++). I have never even tried the NR function -
> frankly I don't understand what it's supposed to do. Removing white noise
> from a signal is theoretically impossible and yet that's seems to be what
> the expectation of the NR is. Surprisingly most of the effectiveness of the
> NB on my pulse noise is coming from the DSP portion of the NB, although I
> use a combination of the two (setting t2-4,MED3), as suggested by many.
> 
> Knut - AB2TC
> 
> 
> Stephen Prior wrote:
>> 
>> This is a 'me too'.
>> 
>> Having, in waiting for my K3, read all sorts of accolades for the NB and
>> NR,
>> I feel, now that I have the radio in front of me, somewhat deflated.  The
>> NB
>> is, it seems to me, no better than many others I have used (eg TS-850) and
>> the NR does not seem, to me at least, to be any better than that on the
>> TS-480 this K3 replaced.  And, I have experimented with all the various
>> settings available and am running the latest firmware.
>> 
>> Having said that, I remain 95% delighted with the K3.  The strong signal
>> handling is fantastic, I like the ergonomics and the tx audio is simply
>> excellent.  I would not swap it for any other radio.  But, the NB and NR
>> have not lived up to my (maybe unrealistic) expectations.
>> 
>> 73 Stephen G4SJP
>> 
>> 
>> 
> 
> 
> -
> AB2TC - Knut

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Re: [Elecraft] K3 noise blanker

2008-08-17 Thread Tom W8JI

Having, in waiting for my K3, read all sorts of accolades 
for the NB and NR,
I feel, now that I have the radio in front of me, somewhat 
deflated.  The NB
is, it seems to me, no better than many others I have used 
(eg TS-850) and
the NR does not seem, to me at least, to be any better 
than that on the

TS-480 this K3 replaced.


Have to agree with you on that, Jim. It's definitely a 
trade-off
between noise suppression and signal intelligibility. As 
with many

things, it works better on CW than it does on SSB.



I think perhaps the people that are ecstatic about noise 
reduction have noise that is greatly different than the type 
of signal they are trying to copy. The unhappy campers are 
trying remove noise that is similar in characteristics to 
what they are trying to hear. If the blanker or reduction 
system can't tell the noise from the signal it can't work no 
matter how much time and effort is put in the design.


An RF noise nulling device would be a solution if the noise 
is from a defined direction and source.


This reminds me a little of that "For Eyes" commercial.

73 Tom

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Re: [Elecraft] K3 noise blanker

2008-08-17 Thread Dave Martin

On Sun, Aug 17, 2008 at 4:30 PM, Stephen Prior <[EMAIL PROTECTED]> wrote:
> This is a 'me too'.
>
> Having, in waiting for my K3, read all sorts of accolades for the NB and NR,
> I feel, now that I have the radio in front of me, somewhat deflated.  The NB
> is, it seems to me, no better than many others I have used (eg TS-850) and
> the NR does not seem, to me at least, to be any better than that on the
> TS-480 this K3 replaced.  And, I have experimented with all the various
> settings available and am running the latest firmware.
>
> Having said that, I remain 95% delighted with the K3.  The strong signal
> handling is fantastic, I like the ergonomics and the tx audio is simply
> excellent.  I would not swap it for any other radio.  But, the NB and NR
> have not lived up to my (maybe unrealistic) expectations.
>
> 73 Stephen G4SJP
>
>
I recall hearing quite effective noise reduction on the demo files
offered by one or two manufacturers of NR speakers or NR boards, even
on SSB.  It didn't seem very similar to what we have with the K3 noise
reduction.  Does anyone have one of the speakers to compare with the
K3 NR?  My noise is terrible here and I've thought several times of
ordering one of the speakers or boards, but hate to without some way
to compare them first to what I have with the K3.

Dave  W5DHM
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Re: [Elecraft] K3 noise blanker

2008-08-17 Thread ab2tc

Hi,

One of the main reasons for me buying the K3 was the demonstrated ability to
eliminate pulse noise emanating from power lines and ignition noise (I
listened to before/after audio clips demonstrating this on the web). The NB
is very effective and does not distort signals at all unless they are
really, really strong (S9+20dB++). I have never even tried the NR function -
frankly I don't understand what it's supposed to do. Removing white noise
from a signal is theoretically impossible and yet that's seems to be what
the expectation of the NR is. Surprisingly most of the effectiveness of the
NB on my pulse noise is coming from the DSP portion of the NB, although I
use a combination of the two (setting t2-4,MED3), as suggested by many.

Knut - AB2TC

Stephen Prior wrote:
> 
> This is a 'me too'.
> 
> Having, in waiting for my K3, read all sorts of accolades for the NB and
> NR,
> I feel, now that I have the radio in front of me, somewhat deflated.  The
> NB
> is, it seems to me, no better than many others I have used (eg TS-850) and
> the NR does not seem, to me at least, to be any better than that on the
> TS-480 this K3 replaced.  And, I have experimented with all the various
> settings available and am running the latest firmware.
> 
> Having said that, I remain 95% delighted with the K3.  The strong signal
> handling is fantastic, I like the ergonomics and the tx audio is simply
> excellent.  I would not swap it for any other radio.  But, the NB and NR
> have not lived up to my (maybe unrealistic) expectations.
> 
> 73 Stephen G4SJP 
> 
> 
> 

-
AB2TC - Knut
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Re: [Elecraft] Re: Software Upgrades

You are right David,

The power output indication (in the VFO B area) changes but the actual power
out as indicated on the K3 does not.  Furthermore, if I go below 12W such
that the QRO PA goes out of circuit, the actual power will drop (not sure
what to) and will not return to 20W when I increase it.

Apologies for my rather 'blanket' dismissal of your observation!

73 Stephen G4SJP

On 17/08/2008 21:34, "Dave G4AON" <[EMAIL PROTECTED]> wrote:

> Stephen
> 
> Try, DATA A, audio into K3 via line input, RTTY (or any similar audio
> data mode), set power to 20 Watts, go to TX and try to turn up the power
> while transmitting. Nothing happens, the power remains at 20W.
> 
> 73 Dave, G4AON
> K3/100 #80, f/w 2.23
> 
> I quite agree David, but I'm surprised that you are saying that the TX power
> cannot be changed whilst transmitting, because I certainly can do that on
> all modes so far as I can see with the latest beta that you have.
> 
> 73 Stephen G4SJP
> 
> 
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[Elecraft] Re: Software Upgrades


Further info on the "frozen" power level adjust on TX with data modes.

The problem appears to be a very slow ALC algorithm, on a constant data 
stream the power level eventually gets there, on burst modes such as 
Pactor and Amtor it never changes to higher levels but oddly will reduce 
if turned down from a high power level.


Sorry about any confusion...

Dave, G4AON
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[Elecraft] Re: Software Upgrades


Stephen

Try, DATA A, audio into K3 via line input, RTTY (or any similar audio 
data mode), set power to 20 Watts, go to TX and try to turn up the power 
while transmitting. Nothing happens, the power remains at 20W.


73 Dave, G4AON
K3/100 #80, f/w 2.23

I quite agree David, but I'm surprised that you are saying that the TX power
cannot be changed whilst transmitting, because I certainly can do that on
all modes so far as I can see with the latest beta that you have.

73 Stephen G4SJP


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Re: [Elecraft] K3 noise blanker

This is a 'me too'.

Having, in waiting for my K3, read all sorts of accolades for the NB and NR,
I feel, now that I have the radio in front of me, somewhat deflated.  The NB
is, it seems to me, no better than many others I have used (eg TS-850) and
the NR does not seem, to me at least, to be any better than that on the
TS-480 this K3 replaced.  And, I have experimented with all the various
settings available and am running the latest firmware.

Having said that, I remain 95% delighted with the K3.  The strong signal
handling is fantastic, I like the ergonomics and the tx audio is simply
excellent.  I would not swap it for any other radio.  But, the NB and NR
have not lived up to my (maybe unrealistic) expectations.

73 Stephen G4SJP 

On 17/08/2008 20:45, "Bill W5WVO" <[EMAIL PROTECTED]> wrote:

> Jim Brown wrote:
> 
>> Yes, but what is NR and NB doing to signals you're trying to
> copy?
>> It's easy to fool yourself about how well it works when
> listening
>> ONLY to band noise. To be useful, the NB/NR must suppress the
> noise
>> while not doing too much damage to the signal you're trying to
> copy.
>> So far, I haven't been thrilled by what I hear of that.
> 
> Have to agree with you on that, Jim. It's definitely a trade-off
> between noise suppression and signal intelligibility. As with many
> things, it works better on CW than it does on SSB.
> 
> Once the major promised features of the K3 are in place (still
> waiting for a fix for the SSB>CW VFO offset issue when changing
> modes), I'm hoping the NB and NR code will be thoroughly
> revisited.
> 
> Bill W5WVO
> 
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Re: [Elecraft] Re: Software Upgrades

I quite agree David, but I'm surprised that you are saying that the TX power
cannot be changed whilst transmitting, because I certainly can do that on
all modes so far as I can see with the latest beta that you have.

73 Stephen G4SJP


On 17/08/2008 20:37, "Dave G4AON" <[EMAIL PROTECTED]> wrote:

> Bob, some of the "rush" is to try and roll out features that are overdue
> by months, plus how long do folks want to wait once a fault is discovered?
> 
> I have been running beta 2.23 since it came out and to me there is
> nothing wrong with it, although I am not using the KRX3 and much of the
> later firmware was to enable features in the KRX3.
> 
> There are still issues to be resolved, one I would like fixed is the
> inability to adjust power while transmitting data which is tedious.
> There are published items on the "to be implemented" list such as the
> TCXO calibration to 0.5ppm.
> 
> Firmware can be rolled back to earlier versions, so as far as I am
> concerned it's a "win win" situation.
> 
> 73 Dave, G4AON
> K3/100 #80
> -
> After reading countless reflector comments about firmware upgrades and
> releases, it appears to me that in many instances such so called
> upgrades are two steps forward and one in reverse.
> You know the drill, fix this problem, add a new feature, and then find
> that something that worked in previous versions does not function as
> expected and now demands a fix and another firmware version.
> Personally, I would like to see fewer firmware releases and more time
> spent vetting firmware before it is released. Firmware upgrades should
> be two steps forward -- period!
> The rush to add new features and fix bugs in firmware appears to me to
> be too rushed to be efficient and effective. Tell me fellows, why the rush?
> 
> Bob, K9PAG
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RE: [Elecraft] balanced tuner

Also, the load has a huge effect on balance. Few wire antennas for HF offer
decently balanced loads. Unless the wires are literally wavelengths (usually
hundreds of feet) from the earth and other objects, those objects will have
a strong effect on the currents on each side of the antenna. The effect is
greatest near the ends of the wires, where they typically come close to
supports, trees, houses, etc. Unless both ends have identical surroundings,
the antenna, and so the currents in the feedline, are unbalanced. 

Ron AC7AC


-Original Message-
The question is, what is good enough?  To minimize radiation from an open
wire tuned feeder requires, I believe, that the currents in the two wires to
be equal in magnitude and have a phase difference of 180 degrees at the
feedpoint of the feedline.  Feeding a slanted dipole, which is certainly an
unbalanced antenna, is it practical to build a 1:1 balun on a ferrite core
(core type choice?) that, when placed on the output of an unbalanced tuner,
is good enough to force the desired currents from 40m thru 10m without
excesive losses?   Using an LC inductively coupled balanced tuner on such an
unbalanced antenna will not produce the desired results--deliberately
unbalancing the LC tuner by offsetting the taps on the coil will sometimes
get close for me.

73 Paul W5DM


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Re: [Elecraft] balanced tuner

2008-08-17 Thread Paul W5DM

The question is, what is good enough?  To minimize radiation from an open
wire tuned feeder requires, I believe, that the currents in the two wires to
be equal in magnitude and have a phase difference of 180 degrees at the
feedpoint of the feedline.  Feeding a slanted dipole, which is certainly an
unbalanced antenna, is it practical to build a 1:1 balun on a ferrite core
(core type choice?) that, when placed on the output of an unbalanced tuner,
is good enough to force the desired currents from 40m thru 10m without
excesive losses?   Using an LC inductively coupled balanced tuner on such an
unbalanced antenna will not produce the desired results--deliberately
unbalancing the LC tuner by offsetting the taps on the coil will sometimes
get close for me.

73 Paul W5DM

Tom W8JI wrote:
> 
> 
> 
> The choice is build a good 1:1 for the output and use an 
> inexpensive unbalanced network, or use a much more expensive 
> balanced network (in which case we might not even need a 
> balun at all).
> 
> 73 Tom
> 
> 
> 
> .
> 
> ___
> 
> 
> 

-- 
View this message in context: 
http://n2.nabble.com/balanced-tuner-tp727762p729675.html
Sent from the Elecraft mailing list archive at Nabble.com.

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Re: [Elecraft] K3 noise blanker

2008-08-17 Thread Bill W5WVO

Jim Brown wrote:

> Yes, but what is NR and NB doing to signals you're trying to
copy?
> It's easy to fool yourself about how well it works when
listening
> ONLY to band noise. To be useful, the NB/NR must suppress the
noise
> while not doing too much damage to the signal you're trying to
copy.
> So far, I haven't been thrilled by what I hear of that.

Have to agree with you on that, Jim. It's definitely a trade-off
between noise suppression and signal intelligibility. As with many
things, it works better on CW than it does on SSB.

Once the major promised features of the K3 are in place (still
waiting for a fix for the SSB>CW VFO offset issue when changing
modes), I'm hoping the NB and NR code will be thoroughly
revisited.

Bill W5WVO

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[Elecraft] Sub RX

2008-08-17 Thread Ian Maude


Hi all,
One annoying thing I have found with the sub RX installed is that if you 
are running in diversity, altering the shift and width only works for 
the main RX unless you hit BSET and alter the sub independantly, even 
when the two receivers are locked together.  Would it be possible to 
have the shift and width controlled together when running in diversity mode?


73 Ian

--

Ian J Maude, G0VGS
SysOp GB7MBC DX Cluster
Member RSGB, GQRP
K2 #4044 |K3 #455 


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[Elecraft] Re: Software Upgrades

Bob, some of the "rush" is to try and roll out features that are overdue 
by months, plus how long do folks want to wait once a fault is discovered?


I have been running beta 2.23 since it came out and to me there is 
nothing wrong with it, although I am not using the KRX3 and much of the 
later firmware was to enable features in the KRX3.


There are still issues to be resolved, one I would like fixed is the 
inability to adjust power while transmitting data which is tedious. 
There are published items on the "to be implemented" list such as the 
TCXO calibration to 0.5ppm.


Firmware can be rolled back to earlier versions, so as far as I am 
concerned it's a "win win" situation.


73 Dave, G4AON
K3/100 #80
-
After reading countless reflector comments about firmware upgrades and 
releases, it appears to me that in many instances such so called 
upgrades are two steps forward and one in reverse.
You know the drill, fix this problem, add a new feature, and then find 
that something that worked in previous versions does not function as 
expected and now demands a fix and another firmware version.
Personally, I would like to see fewer firmware releases and more time 
spent vetting firmware before it is released. Firmware upgrades should 
be two steps forward -- period!
The rush to add new features and fix bugs in firmware appears to me to 
be too rushed to be efficient and effective. Tell me fellows, why the rush?


Bob, K9PAG
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[Elecraft] (no subject)

2008-08-17 Thread Edward R. Breneiser

Hello all QRPers,

While this isn't a QRP Event, QRPers are encourged to enter!

This is an early announcement to all GORC Members to keep an eye or ear
out for the GORC Iditarod 2009 Challenge! What is it? How do I enter it?
What is the prize? Yes, many questions that will come soon.

What is it? -- It's a race around the world during the winter months on
your "dog sled." The race will take place through the frozen parts of
the world as you "mush" your way across the globe. 

Don't worry you won't have to actually race a dog sled, but you will
have to make contacts around the world!

GORC Iditarod 2009 Challenge

Date: 11/01/08 to 03/31/09
Bands: 80m, 40m, 20m, 15m, 10m
Modes: SSB, CW, PSK31
Power: 100w or less 

RACE COURSE:
1.Canada
2.Alaska
3.Russia
4.Finland
5.Sweden
6.Norway
7.Iceland
8.Greenland

All mushers MUST make one qso in each country in the proper order. No
musher shall advance to the next station (country) without first
contacting 1, then 2 then 3 etc. 

All mushers must sign up before October 1, 2007. No late entries will be
allowed to mush. Your sled will be your radio and the power output you
use. Your dogs will be your antennas! The more power you use, the
heavier the sled and the less points you will receive for each contact.
Heavy antennas mean heavy dogs and less points! You may stay at each
station as long as you like and make contacts, but remember, this is a
race and the earlier you finish the more points you will receive at the
finish. Also any contacts made while you are portable count extra! You
don't have to finish the course, but you'll loose lots of points.

All Mushers will receive a nice certificate upon FINISHING the course. 
First Place will receive a beautiful ICE-Like Trophy! GORC Members are
extra points! 

To enter all mushers must fill out an entry form that will soon be
placed on the GORC Website http://www.wa3wsj.org/GORC.html

(I'll be busy preparing my dogs and sled) 

More details later!
72/73,
Ed, WA3WSJ
The Big GORC




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Re: [Elecraft] Software Upgrades

2008-08-17 Thread Mike Cox

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

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

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

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

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

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

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

Bob, K9PAG
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RE: [Elecraft] K3: anticipated date for next "normal" FW update?

2008-08-17 Thread Rob May

David,
I think you are right.  I'm not a software person, I'm a hardware person in a
software company.  I'm never afraid to try a beta when it's put out here.  There
is nothing that can't be undone.  I've had my K3 less than a week, so I've 
barely
scratched the surface of what I can do with it.  
73,
Rob
NV5E

> Date: Sun, 17 Aug 2008 11:24:37 +0100
> From: [EMAIL PROTECTED]
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3: anticipated date for next "normal" FW update?
>
> Rob May wrote:
>> The beta software that Elecraft releases could more accurately be
>> called "release candidates". It seems that they are tested quite a bit
>
> My impression is that "release candidate" is more an open source term,
> where the distinctions blur, or one used of alpha test software.
>
>> internally before they are released as a beta to owners. There is a
>
> That's the definition of an alpha test. However, I understand that they
> do also run a true beta test, by using a small number of external users.
>
>
> --
> David Woolley
> "The Elecraft list is a forum for the discussion of topics related to
> Elecraft products and more general topics related ham radio"
> List Guidelines 
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_
See what people are saying about Windows Live.  Check out featured posts.
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Re: [Elecraft] K3 and recording SSB

2008-08-17 Thread Jeff Kinzli N6GQ

Nick and others, thanks for the replies and information.

Sounds like I have some options, and I should be able to get things
working reasonably well.

See you all in the pileups.

Jeff N6GQ (op @ KH6LC)

On Sat, Aug 16, 2008 at 03:03, Nick Lekic <[EMAIL PROTECTED]> wrote:
> Hi Jeff
>
> There are many programs which will allow you to record the audio, but the
> problem
> starts when the time comes to find some particular QSOs in the pile of
> recorded files.
>
> Writelog was perfect for this purpose but I no longer use it for different
> reasons.
>
> I settled with Recall Pro ( http://www.sagebrush.com/recpro.htm )which is
> not as flexible compared with
> Writelog but it does the job.
>
> The program can split the recording after each hour giving you, say, 48
> files per entire contest.  Mine is configured
> to auto name each file by inserting a contest name, the hour and minute.
> Eg. ww2007cw_1000.mp3 for recording
> segment beginning at 10:00GMT.
>
> Depending on MP3 compression level used, each file will be somewhere between
> 10Mb and 15Mb in size.
>
> Since the time stamps are recorded you can later open a selected MP3 file
> and search for a specific point in time (in seconds)
> by moving the playback slider to desired position.
>
> Writelog was unbeatable for this feature.  You could just browse through
> your log, right-click on the given QSO and select 'play this qso'.
> I wish other contest logging programs could do that.
>
> 73,  Nick
> ve3ey
>
>
>
>
>
>
>
> - Original Message 
> From: Jeff Kinzli N6GQ <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Cc: Elecraft Reflector 
> Sent: Friday, August 15, 2008 11:51:48 PM
> Subject: Re: [Elecraft] K3 and recording SSB
>
> Thanks guys...I have Audacity, and that's what I was thinking of using
> unless someone had a better idea.
>
> I'm still wondering if there's a way to get the monitor audio out the
> line-out output from the rear. It would be there out the headphone
> jack but as K8DD pointed out, that is going to be controlled by the AF
> Gain, which isn't optimal.
>
> Jeff N6GQ
>
> On Fri, Aug 15, 2008 at 19:15, Don Wilhelm <[EMAIL PROTECTED]> wrote:
>> Jeff,
>>
>> For recording software, I suggest Total Recorder (www.highcriteria.com)
>> for
>> recording ease.  It is not free, but is budget priced and does the task
>> well.
>>
>> If you are looking for something free, I suggest you look at Audacity from
>> www.sourceforge.net - it is a great audio editor and is open source and
>> multi-platform.
>>
>> I record with Total Recorder and edit with Audacity myself.
>>
>> 73,
>> Don W3FPR
>>
>> Jeff Kinzli N6GQ wrote:
>>>
>>> Hey Folks,
>>>
>>> I'm planning a serious effort for CQWW SSB in October and would like
>>> to record the entire contest digitally to my laptop (not the logging
>>> computer, a different one). I'd like to also include in the recording
>>> the monitor audio on XMIT, is this possible?
>>>
>>> If anyone has had any great success with any particular computer
>>> recording software, I'd love to hear about that, too. My plan is to
>>> just run the LINE-OUT from the K3 to my MIC-IN on my laptop, and
>>> adjust MIC levels until I have something that doesn't distort. Any
>>> words of wisdom or success stories are welcome...
>>>
>>> Thanks!
>>>
>>> Jeff N6GQ
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>>> No virus found in this incoming message.
>>> Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database:
>>> 270.6.3/1613 - Release Date: 8/15/2008 5:58 AM
>>>
>>>
>>>
>>
>>
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[Elecraft] K3-100 #1433: K3 ATU MALFUNCTION

2008-08-17 Thread Jack Regan

Greetings to all,

 

Here is the text of a note I sent to k3support.  I hope someone has some
ideas.

On Saturday the 16th I noticed that the ATU gave a higher SWR than bypass
when transmitting to a resonant antenna. The difference was small so I
thought I would just note it and observe.

 

Today, Sunday the 17th I found that on 14.050 in bypass mode at 14.050 I get
a 1.1 to 1 reading but in ATU mode I get higher that 2 to 1 and a HI SWR
message.

On 7.050 I get 1.0 to 1 in bypass and 1.4 to 1 in ATU mode. 

 

This is a change from when the rig was first built on Friday the 8th.
Originally if I had 1.1 in bypass I would get 1.0 in ATU mode.

 

Help! I thought I was up and running after a week of problems and now a new
one! Any suggestions would be appreciated.

 

Jack

 

 

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[Elecraft] Software Upgrades

2008-08-17 Thread BOB PHILBROOK

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

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

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

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

Bob, K9PAG
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RE: [Elecraft] K3: PA Jumper question

Yes, Wayne changed it a while back. 

Ron AC7AC

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bob Cunnings
Sent: Sunday, August 17, 2008 8:30 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3: PA Jumper question


Er, try PAIO ON and see!

Bob NW8L

On Sun, Aug 17, 2008 at 8:48 AM, Guy Hamblen <[EMAIL PROTECTED]> wrote:
> My K3/100 #1394 did not have the PA Jumper installed on the RF Board.
> I have installed the KPIO3 board which will act as a "jumper" without 
> the PA installed.
>
>
>
> Previous discussion says to select PAIO Nor in the menu setup.
>
>
>
> Problem:  When selecting KPA3 with VFOB, there is no PAIO Nor in the 
> menu with VFOA.  I have the following VFOA items:
>
>
>
> Not Inst, PAIO ON, PAIO Tst, PAIO FN1 thru FN4, PA Byp, PA Nor, PA FN1 
> thur FN4.
>
>
>
> What am I doing wrong?
>
>
>
> Thanks, Guy, N7UN/2
>
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Re: [Elecraft] HamSphere

2008-08-17 Thread David Ferrington, M0XDF


Thanks, but my download resulted in a .jar that I can just double-click
looks like the server is down though.

now presumablt it either uses the built in mic and sound out or I need  
a headset and mic?

K3 #174, HexKey £375
--
A good cook is like a sorceress who dispenses happiness.
-Elsa Schiaparelli, fashion designer (1890-1973)

On 17 Aug 2008, at 03:17, O. Johns wrote:


Folks,

If you have a Mac and download the zip file from the HamSphere web  
page, note that simply double-clicking that zip file will NOT  
produce the jar file you need.  The Mac will unzip and then go ahead  
and un-jar the jar file, resulting in a collection of class files in  
a nest of directories.  I found that does not work.


So, to use HamSphere on the Mac, first download the zip file and put  
it in some new folder you make for that purpose.  Then open Terminal  
and cd to that folder.  Now, in Terminal, do "unzip .zip" where  
the  is the prefix of the zip file.  That will do what you  
want.  A jar file will appear, and that jar file will run correctly.


Now close Terminal and double click on the jar file you just  
created.  Should work unless something is wrong with your java setup.


73,
Oliver W6ODJ

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Re: [Elecraft] K3 Stopped Transmitting

2008-08-17 Thread Jim Brown

On Sun, 17 Aug 2008 09:36:04 -0700 (PDT), Ed Schuller wrote:

>I was using my K3 in the NAQP contest yesterday

Hi Ed, 

My K3 is about two months old. Just before NAQP CW, I left it on 
overnight, having verified that everything was working with N1MM and 
SO2R (with the MP) the night before. When I came in the shack an 
hour before start time Saturday morning, I had no RF out at all, but 
the keyer/paddle made sidetone. By the time I had finished 
troubleshooting, the keyer had stopped working. It's currently in 
line for repair in Aptos. Initial diagnosis is that the 10W power 
amp died. 

73,

Jim K9YC



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Re: [Elecraft] Virtual Elecraft Users Net anyone?

2008-08-17 Thread Dan Romanchik KB6NU

Anyone can set up a conference on their node and allow multiple  
connections to the node. All one has to do is to check a box in the  
appropriate dialogue box.


73!

Dan KB6NU
--
CW Geek and MI Affiliated Club Coordinator
Read my ham radio blog at http://www.kb6nu.com
LET'S REALLY MAKE THE ARRL THE NATIONAL ASSOCIATION FOR HAM RADIO


On Aug 17, 2008, at 6:29 AM, Julian, G4ILO wrote:

O. Johns wrote:


Do you know how to FORM a net on Hamsphere?  If you do, I'd be  
willing

to join a bunch of people to chat with you about Elecraft radios.

You just turn up on a prearranged "frequency" and time, and chat.  
However,
so far you are the only person to have expressed an interest in this  
method

of linking Elecraft users.

I received a suggestion that more people might be already equipped and
willing to participate in an Elecraft net on EchoLink. From what I can
understand, EchoLink can only be used for one-to-one contacts. For a  
net,
one "one" would need to be a "conference" node, this would require  
someone
to set up a server for it so it's not something we can just go ahead  
and do.


-
Julian, G4ILO
http://www.g4ilo.com/ G4ILO's Shack
http://www.ham-directory.com/ Ham Directory


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[Elecraft] K3 Stopped Transmitting

2008-08-17 Thread Ed Schuller

I was using my K3 in the NAQP contest yesterday, and took a break and turned it 
off. When I came back, and turned everything on, there was no output on 
transmit on any band or mode. If I reduce power to under 10 W, I get around 2 
watts out. Once the power knob is moved above the low power setting, I get 
zero. I reloaded the firmware, and also reinitialized the config file (using a 
known good file). Still nothing. My K3 is factory built, and less than 2 week 
sold (after waiting for over a year for delivery). The receiver,including the 
sub receiver,works fine. I'm stuck (and more than a little frustrated...). Any 
ideas??
   
  Thanks...
   
  73,
  Ed - K6CTA
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[Elecraft] K2 SSB

2008-08-17 Thread raimon


Dear Don
I thank you for the information.
Following your advice. I looked first for a bad solder in the KSB2 
module. As no poor solder was apparent, I decided to resolder all 
connections. After this re-work  the failure has been cured. The K27100 
in SSB mode is working again as it had been until recently.

I thought that my soldering skills were good enough, but I was wrong. Hi.
Many thanks for your help ¡¡¡
Best regards, 73
EA3EZO Raimon

En/na Don Wilhelm ha escrit:

Raimon,

I do believe your first checks should be on the KSB2 option board.
Look at the schematic for the KSB2 in the lower left corner area - you 
will find several passive components associated with Q1, D1 and D2 - 
those are the components are in the SSB ALC section and are the ones 
to check.


I would look first for a poor solder connection.  It is not uncommon 
for a marginal solder connection to fail after a few years even if it 
worked fine initially - once an oxide coating develops, it will fail 
(usually because of a higher than normal resistance at the 
connection).  It *could* be a component failure, but I would check the 
soldering first and re-flow it if there is any question at all about 
its current quality.


I tend to believe that the band dependency is a 'red herring' and is 
the simple result of the fact that the intrinsic transmit chain gain 
of the K2/100 goes down as the frequency is increased.


If you find no problem obvious on the KSB2 board, I would suggest that 
you remove the KPA100 and test the base K2 for a similar condition.


73,
Don W3FPR

raimon wrote:

Hi all

I am having troubles with my K2, and need your help

.
Now it continues to work all right in CW in all bands, but in SSB 
power output drops substantiably in 20, 30, 15 ,12 and 10 meters bands.



I suspect the KSB2SSB module. Where should I look for the cause of 
this problem?


Many thanks in advance

Raimon

EA3EZO

[EMAIL PROTECTED] 

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[Elecraft] K3 AGC and IF Output Data

2008-08-17 Thread Merle Bone

Jack,
Thanks very much for the data on the K3 AGC Slope and Threshold. It is really 
helpful to see the hard data on the performance of such important radio 
characteristics. I wish all manufacturers would provide that kind of data on 
their rigs and update it when new firmware is released. It really helps in 
understanding the performance impact of particular functions and in picking out 
the kind of "starting settings" one might want to use on different bands.
Thanks & 73,
Merle - W0EWM
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RE: [Elecraft] little OT: sweating the details

Ha, ha! You are quite right Charles. In the 1950's a great many Hams looked
askance at anyone operating a factory built rig. "Appliance Operator" was a
highly pejorative term more often whispered about someone than spoken aloud
in polite company. 

I believe the lack of chirps, clicks and poorly modulated phone signals on
the bands today is a warning sign. Not enough Hams are tinkering, playing
and learning how to build rigs or how the rig they have works. 

Worse, those signals are so rare these days there are some Hams who think
they should be illegal. 

That is truly disturbing. 

Much of what I learned the first few years on the air came from fellow Hams
who patiently answered my questions and made suggestions. I try to repay
them in a small way by taking the time to answer questions and encourage
others today. 

Ron AC7AC 



-Original Message-

Every now and then, I read every message placed

on several ham radio reflectors.  I am astonished at

1. the high level of detail that some hams worry about and

2.  the low level of basic knowledge that the ham test should

have caught and finally

3. the seeming unwillingness to just go ahead and try something

instead of asking "permission" from "those who know more" (see

the quote marks?)

73


Charles Harpole

[EMAIL PROTECTED]

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[Elecraft] K3: PowerMate Knob Software

2008-08-17 Thread Mike McLendon


I am looking for anyone interested in testing and providing feedback on some
software I am developing.  If you have a Griffin Technology PowerMate knob,
a PC running Windows XP connected to your K3 serial port and would be
interested in having a go at the application, read on.
 
I have seen various requests for K3 features such as a band switch, memory
tune and so on mentioned in forums and have talked to a couple of contest
operators about what frequently used functions are needed during a contest.
I developed a Windows application that allows the user to select and program
K3 commands into the PowerMate knob's TAP, HOLD, ROTATE CCW, ROTATE CW
movements. The application is named PowerMateNet and it is released under a
no fee GNU GPL license.
 
The application features an practically unlimited storage for the user's
favorite commands, 10 user programmable quick function program access
buttons and operation in the background so other programs can run. At this
time I have tested operation with Telepost Inc's LP_Bridge port sharing and
that works great with LP-Pan, Power SDR external band decoders and so on.  
 
If interested, drop me an email (mike at mclendon dot info) and I will send
you the download link.
 
Here is the Griffin site if you are curious about the Human Interface Device
(HID) that they sell:
 
http://www.griffintechnology.com/products/powermate
 
73, Mike KE4U
 
 

-- 
I am using the free version of SPAMfighter for private users.
It has removed 955 spam emails to date.
Paying users do not have this message in their emails.
Get the free SPAMfighter here: http://www.spamfighter.com/len


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Re: [Elecraft] K3 noise blanker

2008-08-17 Thread Jim Brown

On Sun, 17 Aug 2008 10:10:06 +0200, Arie Kleingeld PA3A wrote:

> pulse is very much suppressed (not totally) in the K3 !  Wow.

Yes, but what is NR and NB doing to signals you're trying to copy? 
It's easy to fool yourself about how well it works when listening 
ONLY to band noise. To be useful, the NB/NR must suppress the noise 
while not doing too much damage to the signal you're trying to copy. 
So far, I haven't been thrilled by what I hear of that. 

73,

Jim K9YC


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[Elecraft] K3 AGC and IF Output Data

2008-08-17 Thread Jack Smith

My K3 arrived Wednesday (SN 1378, assembled with 100W and 2nd receiver 
option, ordered in late May 2007 and held until the 2nd  receiver was 
available, for those who keep track of such things.)


I've had a chance to look at a couple of items and have written two new 
web pages with the results of my measurements.


First is what do the AGC SLP and AGC THD settings actually correspond 
to? Using an automated data collection system, I've looked at the K3's 
audio output for RF levels between -140 and -20 dBm with varous AGC THD 
and AGC SLP settings. I also looked at the S-meter calibration over a 
similar range while I was at it.  
http://www.cliftonlaboratories.com/elecraft_k3_agc_and_s-meter.htm


Second, I went through the IF sample port signal level  measurements, 
including transfer gain (around -17.7 dB) and 8215 KHz isolation (68 dB 
or thereabouts) as well as signals out of the IF sample port other than 
the desired IF frequencies. I also looked at performance of a Softrock 
6.2 Lite and my Z90 when connected to the K3 with and without an 
auxiliary buffer amplifier. There's also an important note for Z90 
owners planning on using their Z90 (or Z91) with a K3. 
http://www.cliftonlaboratories.com/elecraft_k3_and_panadapters.htm


Jack K8ZOA
www.cliftonlaboratories.com





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Re: [Elecraft] K3 and recording SSB & CW

2008-08-17 Thread Jim Brown

On Sat, 16 Aug 2008 21:03:51 -0400, hank  k8dd wrote:

>Quite possibly I could have cut down the audio format to something 
>like PCM 8 kHz, 8 Bit, Mono 7 kb/sec.  

The bandwidth of ham communications is less than 4 kHz. It's silly to use 
more than 8 kHz bandwidth to record it when documentation is the only 
concern. The 64kB mpeg stream from my internet jazz station is quite 
satisfying for full bandwidth music, so at least modest data compression 
is also in order. I wouldn't do more than modest data compression though 
-- the algorithms use a lot of bits to describe QRN. Think what your cell 
phone sounds like when someone is in the noisy location! :)

73,

Jim K9YC



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Re: [Elecraft] K3: PA Jumper question

2008-08-17 Thread Bob Cunnings

Er, try PAIO ON and see!

Bob NW8L

On Sun, Aug 17, 2008 at 8:48 AM, Guy Hamblen <[EMAIL PROTECTED]> wrote:
> My K3/100 #1394 did not have the PA Jumper installed on the RF Board.  I
> have installed the KPIO3 board which will act as a "jumper" without the PA
> installed.
>
>
>
> Previous discussion says to select PAIO Nor in the menu setup.
>
>
>
> Problem:  When selecting KPA3 with VFOB, there is no PAIO Nor in the menu
> with VFOA.  I have the following VFOA items:
>
>
>
> Not Inst, PAIO ON, PAIO Tst, PAIO FN1 thru FN4, PA Byp, PA Nor, PA FN1 thur
> FN4.
>
>
>
> What am I doing wrong?
>
>
>
> Thanks, Guy, N7UN/2
>
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Re: [Elecraft] K3: PA Jumper question

2008-08-17 Thread Bob Cunnings

By golly, you're right - in recent firmware, PAIO nor seems to have
gone away, replaced by PAIO ON. I'll bet that it was changed because
of the constant confusion between PAIO nor and PA nor. Try PAIO nor
and see!

Bob NW8L

On Sun, Aug 17, 2008 at 8:48 AM, Guy Hamblen <[EMAIL PROTECTED]> wrote:
> My K3/100 #1394 did not have the PA Jumper installed on the RF Board.  I
> have installed the KPIO3 board which will act as a "jumper" without the PA
> installed.
>
>
>
> Previous discussion says to select PAIO Nor in the menu setup.
>
>
>
> Problem:  When selecting KPA3 with VFOB, there is no PAIO Nor in the menu
> with VFOA.  I have the following VFOA items:
>
>
>
> Not Inst, PAIO ON, PAIO Tst, PAIO FN1 thru FN4, PA Byp, PA Nor, PA FN1 thur
> FN4.
>
>
>
> What am I doing wrong?
>
>
>
> Thanks, Guy, N7UN/2
>
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[Elecraft] K3: PA Jumper question

2008-08-17 Thread Guy Hamblen

My K3/100 #1394 did not have the PA Jumper installed on the RF Board.  I
have installed the KPIO3 board which will act as a "jumper" without the PA
installed.

 

Previous discussion says to select PAIO Nor in the menu setup.  

 

Problem:  When selecting KPA3 with VFOB, there is no PAIO Nor in the menu
with VFOA.  I have the following VFOA items:

 

Not Inst, PAIO ON, PAIO Tst, PAIO FN1 thru FN4, PA Byp, PA Nor, PA FN1 thur
FN4.

 

What am I doing wrong?

 

Thanks, Guy, N7UN/2

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Re: [Elecraft] balanced tuner

2008-08-17 Thread David Woolley (E.L)


Tom W8JI wrote:

The only time moving the balun helps is if the network is a balanced 
network. Even your example shows with the 4:1 balun you still had to use 


Agreed.  I had overlooked feed point tuner needs to balanced in that case.

a balanced tuner. With an unbalanced tuner the feedline could have 
serious radiation problems (depending on feeder length).


--
David Woolley
"The Elecraft list is a forum for the discussion of topics related to 
Elecraft products and more general topics related ham radio"

List Guidelines 
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Re: [Elecraft] balanced tuner

2008-08-17 Thread Tom W8JI



Actually one might put them on the input, in the sense 
that one might
have a balanced feeder at close to 200 ohms and a balanced 
tuner at the antenna end.  That's probably the only case 
in which they would work well.


The basic rule still applies. We can't move any balun to the 
input of an unbalanced network and expect less problems. 
This is because one terminal of the balun always connects 
directly to the load, so the common mode voltages or 
currents are not reduced or transformed **by the network**.


The only time moving the balun helps is if the network is a 
balanced network. Even your example shows with the 4:1 balun 
you still had to use a balanced tuner. With an unbalanced 
tuner the feedline could have serious radiation problems 
(depending on feeder length).


Interesting isn't it? The idea of placing a balun on the 
input of an unbalanced network took off like wildfire but no 
one actually took the time to look at what really happens in 
the system.  Many just accepted it without question.


The choice is build a good 1:1 for the output and use an 
inexpensive unbalanced network, or use a much more expensive 
balanced network (in which case we might not even need a 
balun at all).


73 Tom



.

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Re: [Elecraft] no Sat delivery

2008-08-17 Thread S Sacco

Not once have I ever had any of those problems.

Must be that the gods are specifically mad at you, Chas.  ;-)



On Sun, Aug 17, 2008 at 8:58 AM, Charles Harpole <[EMAIL PROTECTED]> wrote:
>
> Have u noticed that it seems that always you
>
> get a notice of delivery  on a Friday afternoon
>
> that sez "delivery sked for next Monday"
>
> or that the store you need to shop at closes
>
> the very minute you get off work, or
>
> u get fired on a Friday afternoon and can
>
> not look for work until next Monday.
>
> Why is that?
>
>
> Charles Harpole
>
>
> [EMAIL PROTECTED]
>
>
>
>
>
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Re: [Elecraft] balanced tuner

2008-08-17 Thread Geoffrey Mackenzie-Kennedy


David Woolley wrote on Sunday, August 17, 2008 at 1:02 PM

Actually one might put them on the input, in the sense that one might have 
a balanced feeder at close to 200 ohms and a balanced tuner at the antenna 
end.  That's probably the only case in which they would work well.  (Given 
that good balanced feeders are rather more than 200 ohms (although twisted 
pair is less), 4:1 is a compromise between easy engineering and optimum 
match.


Good 200 ohm open wire line can be built using four wires in the 
cross-connected configuration, I have been using such feeders for long runs 
(kept under tension) at HF and 6m / 2m during the past 50 years. Leaves and 
small twigs can get caught between the wires, especially in the Fall, so the 
occasional inspection is required. Flashover has never been a problem in my 
experience even while running a kW when living in Canada.


73,
Geoff
GM4ESD 


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[Elecraft] no Sat delivery

2008-08-17 Thread Charles Harpole


Have u noticed that it seems that always you

get a notice of delivery  on a Friday afternoon

that sez "delivery sked for next Monday"

or that the store you need to shop at closes

the very minute you get off work, or

u get fired on a Friday afternoon and can

not look for work until next Monday.

Why is that?


Charles Harpole


[EMAIL PROTECTED]





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Re: [Elecraft] balanced tuner

2008-08-17 Thread David Woolley


Tom W8JI wrote:



Why would anyone ever put a 4:1 voltage balun on a tuner input? Bad 
enough to use one on the output!


Who said voltage balun?  The Elecraft 4:1 baluns are current baluns.

One wouldn't put them directly on the input, but the point was that it 
is not sufficient to say that a current balun never has an impact on 
differential signals.  The real implication here is that 4:1 current 
baluns have rather a narrow range of applicability.


Actually one might put them on the input, in the sense that one might 
have a balanced feeder at close to 200 ohms and a balanced tuner at the 
antenna end.  That's probably the only case in which they would work 
well.  (Given that good balanced feeders are rather more than 200 ohms 
(although twisted pair is less), 4:1 is a compromise between easy 
engineering and optimum match.


--
David Woolley
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.
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Re: [Elecraft] balanced tuner

2008-08-17 Thread Tom W8JI

Probably true of the 1:1 configuration, but not of the 1:4 
configuration.  If you analyze the latter in terms of 
chokes, you have a choke connected across the differential 
signal, so if the differential impedance is high, most of 
the current would bypass the antenna.



Why would anyone ever put a 4:1 voltage balun on a tuner 
input? Bad enough to use one on the output! 


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[Elecraft] UK Elecraft net report for Sunday 17th August