January 20, 2014 - SOLD OUT - Bug Descratcher II kit
A new version, the Bug Descratcher III kit is now available. 5/21/2014
NOTE: build is different than the original Bug Descratcher kit - be sure to use the correct docs
The Bug Descratcher II kit was the second version of a
from the September 1992 issue of QST by WX7G, Dave Cuthbert.
The Bug Descratcher II removes the "scratchiness" encountered with semi-automatic keys (bugs) due to contact
bounce. It can also be used with straight keys. It features:
a debounced output to eliminate scratchy sounding keying
optional solid state relay (SSR) output to key nearly any rig (solid state, tube positive or tube negative keying voltage)
available as a board only kit
board size: .7 x 1.5 inches
operates from 13.8 volt supply
same circuit as original
Bug Descratcher kit but eliminates the "flying" lead and adds power/ground holes
Please email comments/questions to: Chuck Olson, WB9KZY at:
Kit Documentation: download (Right click/save target as) and print the Bug Descratcher kit
schematic diagram and
all in Adobe Acrobat (.pdf) format.
Also, a text file of diagnostic measurements.