[Elecraft] Elecraft CW Net Special Request Addenda

2005-03-05 Thread Kevin Rock

Yes folks,
  It is me again.  I have a special request to make of the lucky few 
Elecraft owners who live in either Delaware or South Dakota.  Could you 
please brush off your key or paddles and try checking in to my humble 
net?  I would appreciate it very much if you could knock the last two 
states required off our WAS list.  Then I will apply to Larry Makoski, 
W2LJ, the Elecraft Awards Manager, for an Elecraft WAS certificate for the 
Elecraft CW Net.  It will be posted on Dan's web site along side our 
Century Award.  The serial number list has since grown to nearly 300 so 
maybe we should apply for a stamp on the electronic certificate ;)


Once again: anyone from Delaware or South Dakota who likes CW and wants to 
get on the air please join us!

   Kevin.   KD5ONS


Monday z (Sunday 4pm PST) 14050 kHz
Monday 0300z (Sunday 7pm PST)  7045 kHz


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[Elecraft] Elecraft CW Net Announcement

2005-03-05 Thread Kevin Rock

Good Evening,
Becker and Fagan's Bodhisattva in the headphones, soldering iron in hand, 
circuit design that was on paper is working in real life; I feel like 
Pagliaci.  So it goes.  The tuner and SWR bridge are working nicely.  Now 
to crunch them down to fit in a backpack and be rugged enough for the 
trail.  Steely Dan is doing wonders however; bringing back memories of the 
early '70s and campus life at UW off the Union pier hitching rides on 
sailboats.  Skiing across the lake to the ice shanty to fish all nite or 
catch a ride back on an iceboat.


40 meters was nice on Thursday night for the fox hunt.  Working across to 
NY was a bit of a stretch but doable.  Yesterday W7WEL was an easy catch 
up in Idaho.  Turned down the power and worked him for about half an hour 
on 40 meters until hunger forced me off the air.  He was eating while 
listening but I've yet to reach that skill level :)  KL7V is pushing but 
I'm still stuck to a pencil for the most part.  Soon it will be too fast 
but somehow I am writing at 28 wpm.  And I thought writing at 14 wpm was 
fast.


Hopefully 20 meters will be working well tomorrow.  My new tuner is tuning 
my G5RV on that and other bands near 20 watts.  Lots of fun working out 
all that complex arithmetic.  Not difficult just error prone and tedious.  
I think I will just write some software with a nice GUI to work out 
component values and chart the results.  Easier than using a calculator to 
bang it out long hand.  Space Weather tells me the sunspot number is 
currently 22.  That may mean 40 will be quiet tomorrow so I can work down 
to S1 or lower to pick up the folks I missed last week.  Cross your 
fingers.


Please join us :
Monday z (Sunday 4pm PST) 14050 kHz
Monday 0300z (Sunday 7pm PST)  7045 kHz

Visit our web site: http://ecn.visionseer.com/ for net details.  Thanks 
Dan.


There are no special procedures to follow on ECN.  Just send your call 
sign when one of the NCS folks calls for QNI.  Speed is whatever you feel 
comfortable with.  Please check in and see who you can hear around North 
America.  New Zealand to South Africa to Germany are the limits so far.  
As the season changes we may have special propagation allowing us to meet 
many new folks from across the world.  You also get to hear a few weather 
reports too :)

   73 and see you on the net,
   Kevin.  KD5ONS


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RE: [Elecraft] KSB2-Filter Measurements

2005-03-05 Thread VR2BrettGraham

W3FPR added:


> -Original Message-
 ... - but I just can't pull some things
> through on the K2 that I can with the 950 fitted with decent after-market
> filters.  

Comparing the K2 to any other rig outfitted with after-market filters is not
really a fair comparison.  It does make me wonder how the K2 would do with
similar after-market filters -- alas, those filters do not seem to exist.


Yes, one could say it is unfair, so instead consider any rig with OEM
filters against that rig with decent after-market filters - especially
those from say INRAD - anyone who has used an INRADed rig will
no doubt appreciate what after-market filters might do for our K2s!


With almost 5000 K2s out there now, I wonder if InRad is having second
thoughts about providing filters for the K2 - it may require a non-SSB K2 to
fit them in physically, and with the small market created by that simple
fact, they may still not be interested.  Actually, the filters on the K2 are
not shabby by any means, but like most anything else, could be improved with
sufficient bucks and effort.


An INRAD CW filter for the K2 is already available, but W2VJN
suggested to me I might not want to buy one as it's hard to use - no
ability to select it - so no point in doing more than a limited production
run & call them prototypes.  Even then, the cost was not far into the
USD three-digit range - easily justified based on the expectation of
what it could do, but perhaps a bit too dear seeing how it ended up in
the junk box (being stuck having to always listen through the INRAD
filter equally wasn't on).

One INRAD filter can be made to fit in a K2 w/KDSP, KPA, KSB &
KNB & I believe I can find space for another.  To be able to
complement the K2's stock filters with one good CW & one good SSB
filter would be fantastic & definitely nowhere near as costly as doing
what many of us do to other rigs (like coming up with something in the
area of USD 1k to INRAD most of an MP, for example).

No connection with INRAD here other than 20+ years of using their
products & purchasing one of the last K2 filters George had made
up despite the difficulties using it.  Perhaps there is more to it than
we realize, but INRAD sales are not detrimental to Elecraft as they
are for Brands I, K or Y.  Instead of building something from scratch,
it's unfortunate that with the K2 it is not possible to easily use any
alternative filter from the front panel.

73, VR2BrettGraham

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Re: [Elecraft] Prep time

2005-03-05 Thread rckchp
The Xytronics soldering station you are considering is a fine choiceI  
borrowed an Xytronics model 168 soldering station (different model, but 
similar, has analog temp meter)  to assemble the first 1/2 of my K2, when my 
"lender" needed it to be returned for his own projects. I purchased a 
Techamerica (Radio Shack brand on sale for $50 at the time) and finished the K2 
with it, but the "iron" is much longer and clumsier to use than the Xytronics. 
Best part of this story is that last summer I found a brand new in the box, 
never used Xytronic Model 168 at a garage sale for $5.00 !! Also included was a 
1 lb. new roll of Kester 44 solder! I/m sure the gent that sold it didn't know 
what he hadprobably was given as a gift?

> In that vein, any recommendations for a decent soldering station - maybe 
> Jameco's analog, temp. controlled $58 one with a screwdriver tip? It's 
> Jameco part #229673 at 
> 
> http://jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=100
>  
> 01&catalogId=10001&productId=129019 
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RE: [Elecraft] Is s/n 5000 out?

2005-03-05 Thread John [ N5BSD ]
 
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Any way to reserve it HI HI 


73
- ---
John
N5BSD
www.N5BSD.Com
Linux user #286770
Machine # 246511
http://counter.li.org
- 
- -Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of wayne burdick
Sent: Saturday, March 05, 2005 10:41 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Is s/n 5000 out?

I got s/n 3000, Don. A customer will get s/n 5000 sometime soon, but
I'm not sure who

73,
Wayne
N6KR

-BEGIN PGP SIGNATURE-
Version: PGP 8.1

iQA/AwUBQiqUSz4STIkCKSUlEQL3RACfVqss/NuaEtyzXg5eoGZPCLUKf7cAn0L7
xQC1XvEcuIypYzqKF8MarDuc
=/I9Q
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Re: [Elecraft] Is s/n 5000 out?

2005-03-05 Thread wayne burdick
I got s/n 3000, Don. A customer will get s/n 5000 sometime soon, but 
I'm not sure who


73,
Wayne
N6KR

On Mar 5, 2005, at 5:46 PM, W3FPR - Don Wilhelm wrote:

Don't worry much about it - I would bet that someone at Elecraft will 
be
getting SN 5000 - maybe Wayne - the plan was that he was to get SN 
1000 (or
was it 2000), but that fell thru, so I would guess that Wayne is due 
for a
new one.  I don't have any inside info here - just an 'off the cuff' 
guess.


---

http://www.elecraft.com

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Re: [Elecraft] Heil goldline with K2 all 8 pin mics wired just about te same

2005-03-05 Thread G3VVT
 
In a message dated 06/03/05 01:53:56 GMT Standard Time, [EMAIL PROTECTED]  
writes:

There  seems to be almost a wiring standard on 8 pin  mics?
I tried yet  another  8 pin mic from a ts-850 and TS-50.



-
 
Only if you are sticking to microphones used with Kenwood radios. The Yaesu  
configuration which I use is totally different and non compatible even though 
it  uses the same microphone connector. The Mic Config patch P1 on the K2 
front  panel allows one to select the particular standard in use at your own 
station.  All a matter of personal choice and what you have in available  
microphones.
 
Bob, G3VVT
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Re: [Elecraft] KSB2-Filter Measurements

2005-03-05 Thread Vic Rosenthal

W3FPR - Don Wilhelm wrote:


Comparing the K2 to any other rig outfitted with after-market filters is not
really a fair comparison.  It does make me wonder how the K2 would do with
similar after-market filters -- alas, those filters do not seem to exist.

With almost 5000 K2s out there now, I wonder if InRad is having second
thoughts about providing filters for the K2 - it may require a non-SSB K2 to
fit them in physically, and with the small market created by that simple
fact, they may still not be interested. 


Actually, INRAD did make a prototype K2 CW filter -- 400 Hz with great shape 
factor.  I have one.  I first used a partial SSB board so that it could be 
switched in and out, but I could not get an acceptably low degree of blowby. 
Then I removed the SSB board and just hardwired the filter to the headers where 
the SSB board would go...still poor.  I tried lots of things with shielding and 
grounding but never succeeded in getting results as good as the standard CW 
filters with the KI6WX mod.


Just to be clear, this was NOT a problem with the filter, which looked great 
when tested stand-alone.  It had to do with interfacing it with the K2.


--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco

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RE: [Elecraft] KSB2-Filter Measurements

2005-03-05 Thread W3FPR - Don Wilhelm

> -Original Message-
 ... - but I just can't pull some things
> through on the K2 that I can with the 950 fitted with decent after-market
> filters.  

Comparing the K2 to any other rig outfitted with after-market filters is not
really a fair comparison.  It does make me wonder how the K2 would do with
similar after-market filters -- alas, those filters do not seem to exist.

With almost 5000 K2s out there now, I wonder if InRad is having second
thoughts about providing filters for the K2 - it may require a non-SSB K2 to
fit them in physically, and with the small market created by that simple
fact, they may still not be interested.  Actually, the filters on the K2 are
not shabby by any means, but like most anything else, could be improved with
sufficient bucks and effort.

73,
Don W3FPR


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Re: [Elecraft] KSB2-Filter Measurements

2005-03-05 Thread VR2BrettGraham

G3RXQ shared with us some measurements he made & commented:

This performance was very much better than I expected. The passband has, 
however

about a 2dB ripple in it.


I think it is this ripple that makes using my K2 on SSB seem tiring
to listen to as compared to other rigs.  Reducing the bandwidth on
the K2 makes it even more tiring as compared to other radios that
derive variable bandwidth filtering with two filters & the usual IF
gymnastics.

G3RXQ's comment that the KSB's filter working about as well as it is
probably spot on.  The same could probably be said for the CW filter.
The ripple - along with ultimate rejection (either due to filter or layout) -
could be much better & become obvious when using the K2 in more
demanding situations.  After a weekend of contesting, I get a
headache listening to a TS-950S - but I just can't pull some things
through on the K2 that I can with the 950 fitted with decent after-market
filters.  Even with the nasty high-frequency crud that comes from its
SCAF CW audio filter, I find I gravitate towards the 950 more than the
K2 as my running rig.  Whilst there are number of things about the 950
that stick out as being inferior to the K2 (like phase noise), IMHO
the filters make a big difference - making me wonder what a K2
would be like if we could INRAD it like other rigs.

Again, maybe not an issue for some, depending on one's operating
interests.  I agree with W3ICT - such "criticisms come only because
the K2 is a history making radio in most other respects".

73, VR2BrettGraham

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[Elecraft] Elecraft email List Official Guidelines

2005-03-05 Thread Eric Swartz - WA6HHQ, Elecraft

ELECRAFT email LIST GUIDELINES

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Re: [Elecraft] Heil goldline with K2 all 8 pin mics wired just about te same

2005-03-05 Thread WA2JJH
I found my Kenwood MC-60 mic is wired perfectly pin to pin if you leave out  
the base holder with the pre-amp in it.
 
  The on/off switch on the mic it self works for PTT with lock. I seem  to 
have plenty of millivolts to drive the k2 into ALC COMPRSSION.
 
I also randomly used a mic from my harris RF-3200. The mic worked  too.
 
   There seems to be almost a wiring standard on 8 pin  mics?
I tried yet another  8 pin mic from a ts-850 and TS-50.
 
LETS ME LOOK INTO THIS MORE WITH MORE RIGS THAT HAVE THE 8 PIN ON THE  K2.
 
So far I have plugged 6 different mics(using an 8 pin to 8 pin  cable) into 
my K2.
They all worked with PTT and VOX. Of course some sound great. Others...not  
terrible audio.
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RE: [Elecraft] Is s/n 5000 out?

2005-03-05 Thread W3FPR - Don Wilhelm
Don't worry much about it - I would bet that someone at Elecraft will be
getting SN 5000 - maybe Wayne - the plan was that he was to get SN 1000 (or
was it 2000), but that fell thru, so I would guess that Wayne is due for a
new one.  I don't have any inside info here - just an 'off the cuff' guess.

73,
Don W3FPR

> -Original Message-
>
> Hey, that would be a slick promotion. If you get
> #5000...H
> or the first 10 after # 5000 gets a
> free..


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[Elecraft] Is s/n 5000 out?

2005-03-05 Thread WA2JJH
Hey, that would be a slick promotion. If you get  
#5000...H
or the first 10 after # 5000 gets a  
free..
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RE: [Elecraft] Heil goldline with K2

2005-03-05 Thread W3FPR - Don Wilhelm
Mick,

Set the K2 jumpers for the Kenwood configuration, plug in your Goldline and
give it a try.  You may eventually find that you would benefit from a
preamp, but it will work as is - at least my Heil HC4 and HC5 elements
provide adequate (but not a lot of reserve) output for the K2 with the SSBA
menu parameter set to 3 (an SSBC setting of 2 or higher helps a lot too).  I
have had good success with the KI6WX KSB2 Increased Gain mod as an
alternative to using a pre-amp (particularly on 10 meters).

73,
Don W3FPR

> -Original Message-
> I have a Heil goldline with Kenwood adaptor cable that I used with
> my TS-870 I would like to use this mic with the K2.
> Do I need a mic pre amp or do I just set the jumpers for a standard  kwd.
>
> Thanks Mick  M1MGDK2  #4785..
>


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RE: [Elecraft] K2 #4785

2005-03-05 Thread W3FPR - Don Wilhelm
Mick,

I might believe 3.75 volts or above may be OK, but if you have run out of
adjustment range at 3.3 volts, something is wrong.

First, check the voltage out of your 8 volt regulator (Control Board U4).
If it is OK, look at the schematic for the Control Board (lower left corner)
to identify the resistors associated with the AGC Threshold pot - check the
value of RP6 and check the soldering carefully.  The RF Gain and the AGC
Threshold pot and the other resistors (RP6 and the pot R1) form a
three-legged voltage divider with 8 volts applied to one leg (the RF Gain
control should show zero ohms in its full CW position), so if the resistor
values are correct and the 8 volt supply is correct, you should have no
problem adjusting to 3.8 volts with the AGC Threshold pot near max, and
about 2.6 volts at the other end of rotation.  Be certain that R1 is
actually a 50k pot (measure directly across its terminals when adjusted for
max resistance).  There is nothing else in the circuit to cause problems.

73,
Don W3FPR

> -Original Message-
>
> Hi all
> I have just finished alignment and test part 1 all is good
> except the test for setting the AGC threshold when I adjust R1
> i can only get a max voltage of 3.30v  is this ok ?.
>
> Thanks Mick   M1MGD..
>


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Re: [Elecraft] Speech processing

2005-03-05 Thread VR2BrettGraham

There were a number of external RF speech processor products
available in the early 80s.  I can't find the schematic for my Kenpro
KP-601, but popping the cover I see something potentially
home-brewable (all this discussion drove me to find it, as after
changing compression ratios of the KSB2's compressor, it still
doesn't sound like I would like it to).

This one could turn a RF processor-less rig into something
that sounds like a TS-830S with a D-104 - clean, punchy
audio - and change the peak-to-average ratio enough that
I once baked the paint off the cabinet of an amplifier.

Not recommended for audiophiles or those who are interested
in more casual operation.

73, VR2BrettGraham

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[Elecraft] K2 4785

2005-03-05 Thread M1MGD1
Thanks Jim.
I will try that 
 
Mick M1MGD..
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[Elecraft] Heil goldline with K2

2005-03-05 Thread M1MGD1
Hi all
I have a Heil goldline with Kenwood adaptor cable that I used with
my TS-870 I would like to use this mic with the K2.
Do I need a mic pre amp or do I just set the jumpers for a standard  kwd.
 
Thanks Mick  M1MGDK2  #4785..
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[Elecraft] K2 #4785

2005-03-05 Thread M1MGD1
Hi all
I have just finished alignment and test part 1 all is good 
except the test for setting the AGC threshold when I adjust R1
i can only get a max voltage of 3.30v  is this ok ?.
 
Thanks Mick   M1MGD..
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RE: [Elecraft] Operator's manual?

2005-03-05 Thread W3FPR - Don Wilhelm
Neal,

It covers setup and alignment (not operating), but you will find an extract
from the K2 manual on my website www.qsl.net/w3fpr.  Most of the Operating
information is in the K2 manual in a single section (Chapter 8 -
'Operation')

73,
Don W3FPR

> -Original Message-
>
> I have seen the 'cheat sheet' that was graciously posted on the
> elecraft website but has anyone ever built an operators manual for the
> K2?
>
> It would have the setup and operating sections of the K2, KPA100 and
> all of the modules. Today I have to look through a bunch of things
> (although its easy enough) but it would be great if there was a
> compendium!
>
> 73 de Neal
>
>


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Re: [Elecraft] Operator's manual?

2005-03-05 Thread James Brown
I use a http://www.niftyaccessories.com/Elecraft_RefGuide.htm manual. Take a 
look.


Regards de Jim

- Original Message - 
From: "Neal Campbell and Sarah Ferrell" <[EMAIL PROTECTED]>

To: "Elecraft Reflector" 
Sent: Saturday, March 05, 2005 5:26 PM
Subject: [Elecraft] Operator's manual?


I have seen the 'cheat sheet' that was graciously posted on the elecraft 
website but has anyone ever built an operators manual for the K2?


It would have the setup and operating sections of the K2, KPA100 and all 
of the modules. Today I have to look through a bunch of things (although 
its easy enough) but it would be great if there was a compendium!


73 de Neal

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--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.6.2 - Release Date: 3/4/2005

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[Elecraft] Operator's manual?

2005-03-05 Thread Neal Campbell and Sarah Ferrell
I have seen the 'cheat sheet' that was graciously posted on the 
elecraft website but has anyone ever built an operators manual for the 
K2?


It would have the setup and operating sections of the K2, KPA100 and 
all of the modules. Today I have to look through a bunch of things 
(although its easy enough) but it would be great if there was a 
compendium!


73 de Neal

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[Elecraft] Wanted to borrow - KSB2

2005-03-05 Thread John Huffman
I've tried everything Gary and I have thought of to get some 
distortion out of my K2/100 on SSB.  I now suspect the 
trouble is with the KSB2.


I would like to swap out my KSB2 for a known working module. 
I would be glad to pay shipping each way as well as whatever 
is needed for the privilege of borrowing it for a few days.


Please contact me via [EMAIL PROTECTED]

73 de NA8M
John 


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Re: [Elecraft] question on archives

2005-03-05 Thread n3drk
Glad to know that Eric and Thank You for the info.
73s
john-n3drk


- Original Message - 
From: "Eric Swartz - WA6HHQ, Elecraft" <[EMAIL PROTECTED]>
To: "n3drk" <[EMAIL PROTECTED]>
Cc: "elecraft" 
Sent: Saturday, March 05, 2005 5:49 PM
Subject: Re: [Elecraft] question on archives


> Sounds like you are looking at the qth.net Elecraft archive. We have two
> different archives.
>
> The one on qth.net is -not- searchable.
>
> The one on ac6rm.net is more advanced and -is- searchable by keyword.
> It also displays each day of postings by subject in a web format for
> easy daily scanning.
>
> Both can be reached by links from the email list page on our web site at:
>
> http://www.elecraft.com/elist.html
>
> 73, Eric
> ===
>
> n3drk wrote:
> > I would like to find posts on the reflector such as tweaking the K2 but
I
> > sure would hate to open up every month for the past 4 years. Is there a
> > summary or index somewhere? Sure would be nice if the archive had a
search
> > engine.
> > 73s
> > john-n3drk
>

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Re: [Elecraft] question on archives

2005-03-05 Thread Eric Swartz - WA6HHQ, Elecraft
Sounds like you are looking at the qth.net Elecraft archive. We have two 
different archives.


The one on qth.net is -not- searchable.

The one on ac6rm.net is more advanced and -is- searchable by keyword. 
It also displays each day of postings by subject in a web format for 
easy daily scanning.


Both can be reached by links from the email list page on our web site at:

http://www.elecraft.com/elist.html

73, Eric
===

n3drk wrote:

I would like to find posts on the reflector such as tweaking the K2 but I
sure would hate to open up every month for the past 4 years. Is there a
summary or index somewhere? Sure would be nice if the archive had a search
engine.
73s
john-n3drk

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[Elecraft] Low SSB out on upper bands

2005-03-05 Thread Tom Bosscher
   Up until today, I have only used my K2 on 75 SSB and 40 and 20 cw. 
Today I actually tried some 20 meter ssb, and I have very low output. On 
all the bands, with my K2-100 setup, where I leave the power pot, I get 
70 watts (CW) out agreeing with the K2 display within 10%. On 75 and 40, 
I can get 75 watts PEP out (I'm using a Autek WM1 peak reading 
wattmeter). But on 20 and above I get only 5 watts PEP or so. Yet the CW 
power is there. Is there something simple I am overlooking?


   Tom Bosscher K8TB



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[Elecraft] An answer to somebodys question.

2005-03-05 Thread WA2JJH
They wanted to get the best possible antenna for going mobile(Car)
 
  True, one cannot use a 16 foot whip on the exact center of the car  for the 
best omni directional performance.
 
Some swear by a 7 foot whip that has a load coil in the middle.
 
 Should you go fiber glass or metal whip.  One thing for certain.  You want 
as much radiator
as you can. I have a home brew vertical. So I will scale it down.
 
  I would also consider 7 foot of fiber or metal. Then find a inductor  at 
the end of the 7 foot
rod. I would consider a loading coil and an additional 2 feet of solid  
radiator.
 
  I made a decent 20M ant out of 2 CB antenna'a  A 10/11 meter  whip can be 
found any where.
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Re: [Elecraft] Tight Skirts

2005-03-05 Thread Douglas Westover
My MGB wasn't quite as sexy but served the same purpose..the YL
has been my XYL for the last 40 years.

Doug
W6JD

- Original Message - 
From: "Larry Phipps" <[EMAIL PROTECTED]>
To: "Tim O'Rourke" <[EMAIL PROTECTED]>
Cc: 
Sent: Saturday, March 05, 2005 7:53 AM
Subject: Re: [Elecraft] Tight Skirts


> You fared better than I did Tim. I had a '76 Europa Twin Cam, the black 
> JPS job with gold pinstripes. Eventually sold it for lack of garage 
> space... my wife was happy, my son hated me ;-) I loved scaring people 
> by taking corners at speeds they thought were impossible.
> 
> Still married after 28 years though... she likes ham radio ;-)
> 
> Larry N8LP
> 
> 
> 
> Tim O'Rourke wrote:
> 
> >In 70's tight short skirts were popular.
> >I drove a Lotus and enjoyed the view
> >watching dates slide in and out of the Europa.
> >BTW still have car and girl friend is  my wife 
> >for last 33 years. Tim W4YN
> >
> >Tim O'Rourke 
> >[EMAIL PROTECTED]
> >___
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> >
> >.
> >
> >  
> >
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Re: [Elecraft] Orderd a T! and serial interface. Input wantedon DSPmodule.

2005-03-05 Thread Lyle Johnson
 How difficult is building the DSP module.I see the A/D D/A board is  
built.Excellent!
How about the rest of the DSP.I see there is a larger board under the  
a/d;;d/a board


Consider downloading the KDSP2 manual from the Elecraft website and 
looking it over. The kit portion is pretty straightforward; the DSP 
module is pre-assembled and just plugs in.


73,

Lyl e KK7P

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[Elecraft] FOR SALE: KIO2, KAT2 and KBT2 Installed and Ready to go in a K2 Top Cover

2005-03-05 Thread Roger Marrotte
For Sale: A K2 top cover with a KIO2, KAT2 and KBT2 installed in perfect
working order, ready to plug in and use.  This top cover was put on the
shelf when replaced by a KPA100.  I haven't used it since the first of the
year so I'm selling it.  All items work great and are ready to go.  The KIO2
computer cable is included with all it's parts but is unbuilt.  Please make
me an offer via email.  I'll pay for shipping.  USA and Canada only please.

Thank you,

Roger, W1EM


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[Elecraft] WTT: IC-706 MK II G for K2

2005-03-05 Thread NZ8J
Would like to trade a real nice condition IC-706 MKII G  (160 meters through
440) for a K2 with options. Icom has the following that comes with it:

350 HZ CW Filter
Saratoga E-Z PSK interface
Third party Computer interface (similar to the Icom CI-V)
Amp relay cable
Separation Kit
Tuner control module (allows 10 watt output to tune external tuner)

Original box, manual, mic and power cord

If you have a K2 you would like to trade please send details such as
condition, options, serial number, etc.
Thanks
Tim
NZ8J


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[Elecraft] K2 pritective covers for portable opp.

2005-03-05 Thread Mark Low
I was just wondering if anyone has come up with a protective cover for the K2. 
One perhaps made of leather, or ballastin nylon. It would fit tightly around 
the radio with openings for the speaker and the heat sink area, and allowed 
access to the front pannel. I guess what I am thinking about is something like 
the fitted covers MFJ makes for the annalyzers. I find that I want to take my 
K2 everywhere and thought something like this would be nice as well as added 
protection.

Mark - N5LPT
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Re: [Elecraft] question on archives

2005-03-05 Thread Brian Mury
On Sat, 2005-05-03 at 14:35 -0500, n3drk wrote:
> I would like to find posts on the reflector such as tweaking the K2 but I
> sure would hate to open up every month for the past 4 years. Is there a
> summary or index somewhere? Sure would be nice if the archive had a search
> engine.

It does have a search engine.

Go to the Elecraft website, click on "email discussion list" in the left
pane, then click on "Elecraft forum daily list archives", and look at
the very first thing on the page.

-- 
73, Brian
VE7NGR

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RE: [Elecraft] Prep time

2005-03-05 Thread Robert Tellefsen
Mike
I strongly recommend the AADC L/C IIB
(http://www.mtechnologies.com/aade/#lcm)
It has become a pretty much a standard for QRPers interesting in
homebrewing.
It is far more accurate and useful than the L and/or C measuring ability
of most DMMs.

When my sons were growing up and got into cars, I taught them to buy the
best
tool for the job they were doing, within reason.  For L and C measurement,
you
can't beat the LC IIB.

Good luck and 73
Bob N6WG

-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Mike Markowski
Sent: Saturday, March 05, 2005 12:01 PM
To: Elecraft
Subject: [Elecraft] Prep time


Hi all,

I'm a week or two new to the list and am preparing to jump into a K2
building project.  I need to upgrade some of my gadgets, though, and one
is the DMM - my current one doesn't measure capacitance.  Does anyone
have any recommendations?  Would the cheap one at

http://multimeterwarehouse.com/DT9205f.htm

be good enough?  It's the age old challenge of trying to not spend too
much but trying to not buy trash, too.  I remember someone's email
signature from a few years ago that was along the lines of, "Engineers
aren't cheap, they just optimize cost."  :-)

In that vein, any recommendations for a decent soldering station - maybe
Jameco's analog, temp. controlled $58 one with a screwdriver tip?  It's
Jameco part #229673 at

http://jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId
=10001&catalogId=10001&productId=129019

The dinky soldering iron I have now has been used to successfully build
a QRP rig and a variety of other things, but nothing has been nearly as
expensive as a K2 either, so I figure it'd be wise to play it safe.

Thanks for any tips!  (Pardon the pun.)

Mike  AB3AP
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RE: [Elecraft] Prep time

2005-03-05 Thread Ron D'Eau Claire
Mike wrote:

 I need to upgrade some of my gadgets, though, and one 
is the DMM - my current one doesn't measure capacitance.  Does anyone 
have any recommendations?  Would the cheap one at

http://multimeterwarehouse.com/DT9205f.htm

be good enough?  It's the age old challenge of trying to not spend too 
much but trying to not buy trash, too. 



Wow! Such a price! I have found consistently that one gets about what one
pays for. CE makes pretty good stuff. So what makes it cheap? 

It seems to me that there are two major differences between DMMs at high and
low prices: Speed and Ruggedness.

Almost every DMM uses one of a very small number of "application-specific
integrated circuits" (ASICs)that are made in huge quantities for this
market. The price of the ASIC is largely based on its speed. A cheap DMM can
take 2 or 3 seconds to produce a reading, where an expensive one is almost
instantaneous. 

Slowness is a nuisance in most readings, but it's a disaster if you're
trying to "peak" a reading in real time! You are talking about upgrading. If
your old DMM will do this, you're already fixed up. (I even keep a
d'Arsonval meter "VOM" around for 'peaking' work). But If you want something
to take over all the chores of meter readings, you need to consider that. 

"Fast" meters tend to the in the +$100 range.

A full four-digit display is often very handy too, especially in a meter in
which you are trying to do "peaking" adjustments. This one looks to be a 3
or 3-1/2 digit display. That's typical of cheaper meters too. 

There are some differences in other functions too, but they are usually
minor. 

A lot of folks expect the accuracy of cheaper meters to be less too, but in
my experience that is not the case. Again, the resistance dividers are made
with modern precision manufacturing technology. It just isn't cost effective
for someone trying to build a cheap meter to try to find a cheap divider. So
the accuracy tends to be very similar, regardless of cost.

The other big issue that I've noticed is that the high-priced meters tend to
be more rugged. Of course, you only need a rugged meter if you treat it that
way. It's sort of a "given" that my Flukes were going to take a nose-dive
onto a steel deck plate working on ships all the time. So they had the
rubber boots attached. But around the workbench? Hasn't happened yet!

I was suddenly shy my Fluke one time when I needed a part for it. In the
middle of some work, I cruised to Radio Shack and picked up one of their
meters that sold for about $80. It's slow, but does an excellent job on
capacitance (it has a parasitic capacitance of about 111 pF, but it will
accurately measure a 5 pF cap - displaying it as 116 pF. And it goes up into
the many-microfarad. Ranges. It's a four-digit meter, and the voltages are
within a fraction of a percent of my Fluke or my Bel-Merit (an expensive
pen-type meter). 

I got a freebie CE meter once from Mouser or Digi-Key when I placed an
order. Within the limits of its 3-digit display, it's as accurate as any of
my others. 

Ron AC7AC


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Re: [Elecraft] Prep time

2005-03-05 Thread Larry Makoski W2LJ

Mike,

The soldering station you have in mind will do just fine; I am sure.  
Personally, I have used Weller soldering tools.  I use them at work and 
am just "used" to them.  The one that you're looking at from Jameco 
looks like it will do the job just fine.


As far as the DVM goes, I didn't use the capacitance measuring features 
on mine when I built my K1 and K2.  The voltage and resistance settings 
were all that I used.  I have Flukes at work; but really can't bring one 
of those home.  I used my 'lil one that I bought from Radio Shack.  It's 
quite simple; but did a fine job.


Good luck and have fun!

73 de Larry W2LJ
K2 #4090 - K1 #1647

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[Elecraft] Prep time

2005-03-05 Thread Mike Markowski

Hi all,

I'm a week or two new to the list and am preparing to jump into a K2 
building project.  I need to upgrade some of my gadgets, though, and one 
is the DMM - my current one doesn't measure capacitance.  Does anyone 
have any recommendations?  Would the cheap one at


   http://multimeterwarehouse.com/DT9205f.htm

be good enough?  It's the age old challenge of trying to not spend too 
much but trying to not buy trash, too.  I remember someone's email 
signature from a few years ago that was along the lines of, "Engineers 
aren't cheap, they just optimize cost."  :-)


In that vein, any recommendations for a decent soldering station - maybe 
Jameco's analog, temp. controlled $58 one with a screwdriver tip?  It's 
Jameco part #229673 at


http://jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=129019

The dinky soldering iron I have now has been used to successfully build 
a QRP rig and a variety of other things, but nothing has been nearly as 
expensive as a K2 either, so I figure it'd be wise to play it safe.


Thanks for any tips!  (Pardon the pun.)

Mike  AB3AP
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RE: [Elecraft] question on archives

2005-03-05 Thread W3FPR - Don Wilhelm
John,

Sverre Holm LA3ZA maintains a very good composite list of mods for the K2 -
both 'Elecraft approved' and others.

Look at - http://www.qsl.net/la3za/K2/mod.html or link to it from the
Elecraft website www.elecraft.com.

73,
Don W3FPR

> -Original Message-
>
>
> I would like to find posts on the reflector such as tweaking the K2 but I
> sure would hate to open up every month for the past 4 years. Is there a
> summary or index somewhere? Sure would be nice if the archive had a search
> engine.
> 73s
> john-n3drk
>


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[Elecraft] question on archives

2005-03-05 Thread n3drk
I would like to find posts on the reflector such as tweaking the K2 but I
sure would hate to open up every month for the past 4 years. Is there a
summary or index somewhere? Sure would be nice if the archive had a search
engine.
73s
john-n3drk




-
If it isn't CW, then its CB!

73s
n3drk-john
-

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[Elecraft] Orderd a T! and serial interface. Input wantedon DSPmodule.

2005-03-05 Thread WA2JJH
I am glad a 100W test was conducted.  It is in high SWR that a tuner  shows 
its true colors.
 
  Take this other companies record. We all know this company. I would  say 
all hams have owned one of their skimpy tuner/watt/swr/dummy load all in  ones. 
They are infamouse for parts not firmly in place.(HAVE I GIVEN ENOUGH  HINTS 
:)I !)
 
  They rate their tuner at 300W. I fried 2 of them with 100-200W. The  300W 
dummy load To make a long story short, many have  found that it will handle 
300W with a flat SWR.
The tuner should really be rated at 150W (3:1 SWR.)
 
  I feel good that the T1 can handle bursts of 100W. It means the  tuner is 
over built.
It means I can tune at 15W. I do not have to worry about a 3:1 SWR  
saturating a toroid..
  My K2 is stuffed with Laptop PC lithium cells. I have 72 Watt-Hours  under 
the hood.
So the external tuner fits the bill. I am considering  weather proofing a 
T! and place it at antenna. I would use lic. free RX/TX links  for control.
 
   I also ordered the PC interface. Someone asked me could I not  use a PC to 
process the mic audio, so it will have a wave shape that looks  like it had 
10db of RF compression.
Wow that is some very heavy fourier analysis work!
 
  The serial port...Is there software that gives extended control of  the K2. 
 I would like accurate control of the BFO. This would give me some  type of 
PBT or VPBT
 
 How difficult is building the DSP module.I see the A/D D/A board is  
built.Excellent!
How about the rest of the DSP.I see there is a larger board under the  
a/d;;d/a board
 
TNX de MIKE WA2JJH
 
 
 
 
 
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[Elecraft] Re: Elecraft T1 ATU passes brief stress-tests at 100 W

2005-03-05 Thread W3DX
In a message dated 3/5/2005 10:49:28 AM Eastern Standard Time, 
[EMAIL PROTECTED] writes:

> One of our field testers set up the tuner on all bands using three 
> different antennas, then transmitted at 100 watts intermittently. 

Wayne:

You meant: "One of our intrepid field testers courageously transmitted at 100 
watts."

73 & DX,

Rob, W3DX
K1 0005, K2 0005, KX1 0005
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Re: [Elecraft] Trip to Canada

2005-03-05 Thread Brian Mury
On Sat, 2005-05-03 at 12:22 -0500, Chuck Mabbott wrote:
> He will want to make sure he does a  VE3/Call  or Call/VE3 depending what 
> net you talk to.

Call/VE3 only, actually. Here's the relevant excerpt from RIC-2:

2. The operator of an amateur station licensed by the Government of the United
   States shall identify the station:

   (a) by transmitting the call sign assigned to the licensee's station by the
   Federal Communications Commission; 

   (b) if transmitting: 
   (i) by radiotelephony, by adding the word "mobile" or "portable", or 
   (ii) by radiotelegraphy, by adding an oblique character ("/"); and 

   (c) by adding the Canadian amateur call sign prefix set out in Column I of an
   item of Schedule IV for the geographical location of the station set out
   in Column II of that item.

-- 
73, Brian
VE7NGR

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Re: [Elecraft] kx1 antennas

2005-03-05 Thread Robert Conley

Like I said originally.

Thinking begets trouble..See now I'm in trouble
again for thinking [g].
tnx de 'rc" kc5wa


W3FPR - Don Wilhelm wrote:


RC,

That would be great if you could get it to work - but it won't (at least not
as you expect).  The other half of the antenna system is missing with a 1/4
wave wire, you need a return path for the RF wave - any end fed wire needs
something to work against to complete the antenna system, and RF being the
'funny' thing that it is will always find a path, but that may be a very
high loss path unless one takes precautions to make it otherwise.

73,
Don W3FPR

 


-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Robert Conley
Sent: Saturday, March 05, 2005 10:39 AM
To: [EMAIL PROTECTED] List
Subject: [Elecraft] kx1 antennas


Thinking begets trouble..See now I'm in trouble
again for thinking [g].
tnx de 'rc" kc5wa


   






 




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RE: [Elecraft] kx1 antennas

2005-03-05 Thread W3FPR - Don Wilhelm
RC,

That would be great if you could get it to work - but it won't (at least not
as you expect).  The other half of the antenna system is missing with a 1/4
wave wire, you need a return path for the RF wave - any end fed wire needs
something to work against to complete the antenna system, and RF being the
'funny' thing that it is will always find a path, but that may be a very
high loss path unless one takes precautions to make it otherwise.

73,
Don W3FPR

> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Robert Conley
> Sent: Saturday, March 05, 2005 10:39 AM
> To: [EMAIL PROTECTED] List
> Subject: [Elecraft] kx1 antennas
>
>
> Thinking begets trouble. While reading the "KXAT1" manual. Pages 9 & 10
> show a random length wire antenna system using a  "POMONA 1296 BNC to
> Dual Binding post adapter (mouser #565-1296 $11.83 or jameco #99354
> $5.29). To my way of thinking ( here comes the trouble) 3 resonate wires
> mated on 3 banana plugs will eliminate the need for the KXAT1. Wire #1
> 33' 1/4 wave resonate on 40m used as vertical. Wire #2 1/8 wave of 16.5'
> used radial for 40m  or vertical
> element for 20m. Wire #3 a 1/8 wave length 8.5' radial for 20m. If you
> also have 30m you would need a  forth wire of 23' 1/4 wave section used
> as a vertical element and a fifth wire of 11.5' used as an 1/8 wave
> length radial. These will all fit in a sandwich bag. You would now have
> a complete resonate antenna system for the KX1 See now I'm in trouble
> again for thinking [g].
> tnx de 'rc" kc5wa
>
>


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Re: [Elecraft] Re: Rubber knobs

2005-03-05 Thread K4tmc
Ditto here!

73,
Henry - K4TMC
K2 #3137
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[Elecraft] K2 S/N 4787 Build In Progress

2005-03-05 Thread Jim Harris
Hi Everyone,

First my thanks to everyone who has responed to my
previous email on the same subject.

Just a quick progress report.  I've proceeded thru
part one alignment of the RF board.  Functioned as
designed!!  Also have finished the voltage(?), freq
counter and RF probes.

The only additional situation I've found is that the
masking tape on the cover parts is not as described.

My thanks to everyone on their suggestions on
capacitor values.  As most RF board capacitor are
inserted after part one I still haven't determined how
I am going to handle them.  Some are simliar to those
on the two earlier boards and they should prove no
problem.  The problems will be the ceramic disk and
the dipped little blue guys.  The ceramic only have a
simple number and in many cases that number is not in
the parts list.  I've made good progress thus far in
IDing parts as all test thus far have been successful.
 So, I'm relatively confident I'll be able to somehow
work them out at the right time.

The missing parts I refered to earlier appear to have
been found.  No panic there.

Someone also mentioned about joing in a CW net Sunday
night.  I'm not sure I'll be ready by then.  Still got
lots of work including sorting out caps and winding
torrids.  Stuffing the board and soldering is a
breeze...other things take more time.

Have a great day!

Jim, AB0UK




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Re: [Elecraft] Trip to Canada

2005-03-05 Thread Chuck Mabbott
He will want to make sure he does a  VE3/Call  or Call/VE3 depending what 
net you talk to.  The key is so the Canadian Ops know he is in country.  A 
bunch of nice guys over there!


73  Chuck  AA8VS
- Original Message - 
From: "designer" <[EMAIL PROTECTED]>

To: 
Sent: Friday, March 04, 2005 7:59 PM
Subject: Re: [Elecraft] Trip to Canada


But he has to operate within the Canadian band plan - right? Just to make 
a point - not to whine - I often hear Canadian SSB on top of the 7.070 PSK 
frequency.

73,
Paul
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[Elecraft] Re: kx1 antennas

2005-03-05 Thread jmeade
"3 resonate wires mated on 3 banana plugs will eliminate the need for the
KXAT1"

I'll add my $0.02 here.  If you use a 1/4-wave radiator (33' on 40m) then
you need a 1/4-wave radial "system".  I say "system" because you should use
4 radial wires to make effective vertical antenna with elevated radials. You
might have to play with the actual lengths to get everything resonant, just
like you would have to do for a dipole. You can hook the ends of the wires
to the BNC-to-Banana adaptor to eliminate the feedline but you still want to
make a good vertical antenna "system" that works well.

Using a tuner eliminates the need for "pruning" the lengths to get the
antenna to resonate at the desired operating frequency. 

I think of a single 1/4-wave wire as a "counterpoise" which is not the same
thing as an effective radial system. The "counterpoise" is used with a
random wire antenna and is usually 1/4-wave long and brings the transmitter
end to ground potential. If you have a 1/4-wave wire antenna and a 1/4-wave
counterpoise wire, then you basically have a low dipole with half of it near
(or on) the ground.

I have learned that getting a match is not the only thing to worry about.
You also want an antenna that radiates the signal nicely. I put up a random
wire once at a park and the KX1 found a perfect match.  I called CQ many
times with no takers.  Later, I put up a 1/2-wave inverted vee supported by
an SD-20 pole fed with cheap 300-ohm twinlead and the Elecraft balun.  This
worked great and I had many QSOs that day on all 3 bands. On other days,
however, I have had great QSOs with just the random wire, with and without a
counterpoise.

There are many variables in how well a certain antenna works: band
conditions, power output, the radiation pattern - where the lobes from the
random wire fall, what trees are in the way, the height of the wire, etc. If
the band is in good enough shape, even the Miracle Whip can result in a QSO!

72,

John W2XS
KX1 #15




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[Elecraft] (no subject)

2005-03-05 Thread Edward R. Breneiser
Hello all,
 
If you are my first or last QSO during the EPA QRP Club Polar Bear
Moonlight Madness Event on 3/25, you'll receive a nice National
Geographic Polar Bear Mouse Pad for FREE! Yes, the operative word here
is FREE! To look at it just click the link below.

 http://www.wa3wsj.com/files/PolarBearMousePad.html

72/73,
Ed, WA3WSJ
Polar Bear # 1



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[Elecraft] KX1 Mobile Antenna

2005-03-05 Thread BPCI
Thanks to all who made suggestions on the reflector. I have ordered a 40  
meter hamstick. But in the meantime, I have been using a 24 foot piece of wire  
attached to a magnetic mount I have on the roof of my Jeep (I attach it  to an 
old two meter whip I had).It seems to work okay. I am not yet able to  have 
QSO's while in motion (I am barely able to handle CW in the shack with full  
concentration!). Thanks, again, to everyone...72, Ci
 
Ci  Jones
WU7R 
FISTS 10789
NAQCC 306
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Re: [Elecraft] Tight Skirts

2005-03-05 Thread Larry Phipps
You fared better than I did Tim. I had a '76 Europa Twin Cam, the black 
JPS job with gold pinstripes. Eventually sold it for lack of garage 
space... my wife was happy, my son hated me ;-) I loved scaring people 
by taking corners at speeds they thought were impossible.


Still married after 28 years though... she likes ham radio ;-)

Larry N8LP



Tim O'Rourke wrote:


In 70's tight short skirts were popular.
I drove a Lotus and enjoyed the view
watching dates slide in and out of the Europa.
BTW still have car and girl friend is  my wife 
for last 33 years. Tim W4YN


Tim O'Rourke 
[EMAIL PROTECTED]

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.

 


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[Elecraft] adendum

2005-03-05 Thread Robert Conley
Let me add an addendum. My thoughts are running more towards field days 
and camping. Then I get to SIT

[g] de "rc" kc5wa

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[Elecraft] Elecraft T1 ATU passes brief stress-tests at 100 W

2005-03-05 Thread wayne burdick
The T1 is rated at 20 W SSB/CW and 10 W FM/AM/digital modes, but we 
wanted to make sure it could survive brief operation at much higher 
power levels.


One of our field testers set up the tuner on all bands using three 
different antennas, then transmitted at 100 watts intermittently. As 
expected, the T37-size cores in the T1's SWR bridge became quite warm 
and eventually saturated. However, they recovered quickly after they 
were allowed to cool, and there was no damage to the unit.


Another of our field-testers did extensive testing at 40 watts to 
simulate the use of back-packing amps. The T1's SWR bridge transformers 
again got very warm, but did not saturate until he increased the duty 
cycle (by going key down for longer intervals).


These results suggest that operation at the T1's rated power of 20 W 
peak will be quite safe, even with high-SWR loads.


It's nice to know that the risk of damage is low if the operator 
accidentally transmits at 100 W, or might require brief use of the T1 
at up to 40 W in an emergency communications situation.


73,
Wayne, N6KR
Eric, WA6HHQ

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[Elecraft] kx1 antennas

2005-03-05 Thread Robert Conley
Thinking begets trouble. While reading the "KXAT1" manual. Pages 9 & 10 
show a random length wire antenna system using a  "POMONA 1296 BNC to 
Dual Binding post adapter (mouser #565-1296 $11.83 or jameco #99354 
$5.29). To my way of thinking ( here comes the trouble) 3 resonate wires 
mated on 3 banana plugs will eliminate the need for the KXAT1. Wire #1 
33' 1/4 wave resonate on 40m used as vertical. Wire #2 1/8 wave of 16.5' 
used radial for 40m  or vertical
element for 20m. Wire #3 a 1/8 wave length 8.5' radial for 20m. If you 
also have 30m you would need a  forth wire of 23' 1/4 wave section used 
as a vertical element and a fifth wire of 11.5' used as an 1/8 wave 
length radial. These will all fit in a sandwich bag. You would now have 
a complete resonate antenna system for the KX1 See now I'm in trouble 
again for thinking [g].

tnx de 'rc" kc5wa

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[Elecraft] Tight Skirts

2005-03-05 Thread Tim O'Rourke
In 70's tight short skirts were popular.
I drove a Lotus and enjoyed the view
watching dates slide in and out of the Europa.
BTW still have car and girl friend is  my wife 
for last 33 years. Tim W4YN

Tim O'Rourke 
[EMAIL PROTECTED]
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[Elecraft] Re: K2 - 2nd Xtal Filter

2005-03-05 Thread wayne burdick


On Mar 5, 2005, at 3:27 AM, Stewart Baker wrote:

Anyone any experience of, or thoughts about adding another 3 crystals 
to the K2

2nd crystal filter ?


Hi Stewart,

The present 2-crystal filter (as on newer units, or older units with 
the 2nd XFIL mod) is very carefully designed to provide different 
bandwidths on CW and SSB. Equally important, this filter must be 
centered at the same frequency as the main filter over the full 
controllable bandwidth range. L34 and related circuitry, along with the 
varactor diode, accomplish these tasks.


If you wanted to add more crystals here for the purpose of improving 
ultimate attenuation, two crystal filters switched by pin diodes would 
be needed, along with a complete re-design of all associated circuitry 
(I.F. amp output, product detector input, CW/SSB control, bandwidth 
control in the CW case). This would be very difficult and 
time-consuming, and the resulting circuit would not fit in the present 
location. That would require the use of coax cables to a separate 
module, along with other potential issues such as RF pickup. Chances 
are the result would not be much of an improvement.


If your goal is to improve ultimate attenuation, the KDSP2 is a much 
saner route.


73,
Wayne
N6KR


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Re: [Elecraft] K2 - 2nd Xtal Filter

2005-03-05 Thread Geoffrey Mackenzie-Kennedy
Hello Stewart,

Tail end IF Filter:  Given that the prime purpose of the 2nd IF Crystal
filter is to reduce wideband noise created by the MC1350 IF amplifier, which
comes out as audio "hiss", yes a better filter would do a better job
provided that it is wider than the SSB filter. BUT I suspect that the MC1350
would not be happy driving such a filter with its varying input impedance.
More distortion / intermod would result than when driving the two crystal
filter. The other possibility is that the drive to the AGC system could
"bounce" due to these impedance variations, and depending on time constants
etc oscillation at some frequency high or low could result. An Image Reject
Demodulator can eliminate the need for any "tail end" filter, but no room,

AGC Take-off point. Here I am guessing. It could be 1) To reduce the BFO
signal leaking through the demodulator that might drive the AGC. The filter
chops this down. 2) A simple matter of drive level  3) To reduce AGC Attack
delay.

73.
Geoff,
GM4ESD

- Original Message -
From: "Stewart Baker" <[EMAIL PROTECTED]>
To: "Elecraft Reflector" 
Sent: Saturday, March 05, 2005 11:27 AM
Subject: [Elecraft] K2 - 2nd Xtal Filter


Anyone any experience of, or thoughts about adding another 3 crystals to the
K2
2nd crystal filter ?

73
Stewart G3RXQ

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Re: [Elecraft] Kdsp2 Problems

2005-03-05 Thread Neal Campbell and Sarah Ferrell

Thanks Lyle,

Its not RTC is just dashes and any AFIL setting is 'not installed' so I 
will check point 6.


I will let you know!


On Mar 4, 2005, at 11:41 PM, Lyle Johnson wrote:


Hello Neal,

> I cannot get the initializing led to flicker on my kdsp2.
> When I do the voltage checks, I really cannot make sense\
> of it, versus the schematic.
> Any clues?

Here are a couple of things to try:

1) Turn the K2 on.

2) Be sure the rtc menu item is on, per page 18 of the KDSP2 manual.

3) Turn the K2 off.

4) Turn the K2 on again, then press AFIL (hold the XFIL button rather 
than tap it).  Depending on mode, you should see CF1, CF2, or SF1, 
SF2, etc. on the display.


5) If you get the expected CFsomething, SFsomething, or RFsomething 
(depending on mode) then U1 is operating properly and the DSPx may be 
at fault.


6) If you see "not inst" then it means the K2 and U1 are not 
communicating. This is not a DSPx problem.  It is most likely an 
auxbus issue, and I'd carefully double check the 2N3906 location on 
the KDSP2.


Let me know...

73,

Lyle KK7P



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[Elecraft] K2 AGC

2005-03-05 Thread Stewart Baker
I'm trying to figure out why the AGC feed (IF OUT) is taken off before the 2nd 
Xtal filter in the K2. 

73
Stewart G3RXQ

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[Elecraft] K2 - 2nd Xtal Filter

2005-03-05 Thread Stewart Baker
Anyone any experience of, or thoughts about adding another 3 crystals to the K2 
2nd crystal filter ?

73
Stewart G3RXQ

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