[Elecraft] K2 build C71 and C174
Ron D'Eau Claire
rondec at easystreet.com
Tue Sep 12 11:36:08 EDT 2006
VA3IMO wrote having difficulty with finding C71 and C174.
I had the same problem.
In my kit the 82 pF were labeled as "820" but the manual lists them
as labeled "82".
The same thing occurred with C122, a 56 pF, labeled as "560" but
manual lists as "56"
I don't recall the part number but I think there was also a "561"
labeled cap...I had to do some resoldering once I found out...
John
AB8O
_______________________________________________
What's happening is that some capacitors are labeled with their actual
value, e.g. "82" for 82 pF. Others are labeled with the numeric equivalent
of a color code, including a multiplier. On those an 82 pF cap would be
"820" meaning 82 and a multiplier of zero just as an 82 ohm resistor would
be coded gray-red-black for "820" = 82 ohms.
How the parts are marked may change during the life of a kit as new stocks
are purchased, and a new marking may not be picked up in the manual.
That's why it's nice to have a DMM with capacitance measuring capability to
check caps below .001uFd. Lacking that, doing a complete inventory will
uncover these issues before they are soldered into the wrong positions. I
recommend taping the parts to cards or sheets of paper as they are
identified, each part marked with the proper reference designator next to it
on the page. That way you will find any discrepancies very quickly. And
during the build it acts as another check to ensure all the right parts go
in the right places.
Ron AC7AC
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