Hi David:
I measured C222 *in place* with my aade cap checker and it measured ~1
uF(actually 0.965 uF)... not the 0.1 in the schematic. I'm guessing that
the schematic available for download is not current with production.
Someone else here mentioned that C222 was 1 uF, but I don't remember
who it was.
73,
Ken K3IU
David Pratt wrote:
Elecraft says.....
"Some owners prefer a faster CW keying waveform rise time. The rise
time can be reduced from about 8 milliseconds to 5 milliseconds
without affecting the fall time by replacing capacitor C222 on the K3
main RF board with a 0.1 uF capacitor. This change will also allow a
future firmware revision to further reduce rise time via a menu entry."
But the schematics of the RF Board Rev. A4 (Sheet 3 of 4), dated
9/19/07, show C222 as being 0.1 already. The instructions recommend
removing the existing 0.1 and replacing it with another 0.1 !! Surely
to reduce the rise time the existing capacitor should be shunted with
another one.
Or do Rev A RF boards have a lower value for C222 than that shown on
the schematic?
73
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