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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