[Elecraft] Using the K2's 10th S-meter LED for CW Tuning indication

Tom Hammond n0ss at earthlink.net
Sun Sep 19 12:02:07 EDT 2004


Hi Folks:

WOW! The response has been a bit overwhelming to my offer to send copies of 
my draft set of docs for installing the KR5L or K6XX CW Tuning Indicators 
into the K2, using the 10th LED of the S-Meter Bar Graph.

Rather than sending out individual copies of the PDF, I have now placed a 
PDF of the draft documentation file on my web site at:

    www.n0ss.net

Just follow the Quik-Link down to the link for the article and download it. 
IF YOU DON'T KNOW HOW TO DOWNLOAD A PDF FROM A WEB SITE DIRECTLY TO YOUR 
HARD DRIVE, PLEASE READ THE (YELLOW HIGHLIGHTED) NOTE JUST ABOVE THE 
QUIK-LINK ON MY WEB PAGE FIRST.

And, to those who have asked, yes, I do (or WILL) have boards available for 
this project. At present, the boards are "kitchen-made", in small batches, 
and hand-drilled. Takes a little while to knock them out (mainly due to the 
drilling) but they are pretty decent quality (feel free ask here on the 
reflector for recommendations), and I can usually send them out within 48 
hours of receiving your request. In the future, if order volume warrants, I 
may have to get FAR Circuits to make a bunch up for me, but the cost will 
probably increase just a bit. Currently, a board (either the KR5L or K6XX 
design) are being offered at $5 each ppd to your [stateside] mailbox.

 From anecdotal responses from builders, I tend to prefer the K6XX design a 
bit more since it appears to be more sensitive with regard to hearing 
weaker signals and more responsive with regard to 'following' the sent CW.

I suggest you visit the web site of Sverre Holm, LA3ZA, and check out his 
implementation information as well:

   I have used the right-most LED for some years and I like 
   it very 
much, see my K2 page:
      http://www.qsl.net/la3za/K2.html

   The schematic here for my latest version which runs of a 
   fixed audio 
output:
      http://www.qsl.net/la3za/bilder/K2_amp.gif

   And here for an earlier version with the design philosophy
   described:
      http://www.qsl.net/la3za/QRP_Zero.html 

   This circuit was 
published in G-QRP Sprat, Summer 2002 and 
   in a German translation in 
QRP-Report, 3-2002.

73,

Tom Hammond   N0SS



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