Welcome to the MOuSeFET CW Transmitter Page

Updated information, improved circuitry and layout diagrams.

Original article was in December, 1986 QST by
Mike Masterson WN2A (formerly KA2HZA).
Reprinted in QRP Classics,1990.
Winner QST Cover Plaque Award,Dec 1986

Revision 4: January 2003 Improved Keying
Revision 5: January 2007 Improved Power and More
Revision 6: 17March 2013 Cleaner Signal with Improved Keying.
Additional  Circuit and Construction Information.

 QST Editor for this article was Paul Pagel, N1FB-
(whom is credited with the term MOuSeFET)
Chuck Hutchison W8CH,Technical Editor
set up the ARRL Lab tests.

These transmitters have performed extremely well over the years,
with no component failures or downtime since they were built in 1985.
They have been used portable on camping and vacation trips , driving a
variety of antennas often with less than perfect VSWR loads. They are
intended to provide a clean keyed CW signal on 80,40 or 30 meters of
12-20 watts output from +12-+13.8 VDC.

You can download the latest update in pdf form,
for ease of viewing and printing.

Download size: ~6108 K MOuSeFET Rev 6

Need an Excellent PDF Reader For Linux? Epdfview
Need an Adobe PDF Reader? Acrobat Reader 

Thanks to Rob, PA3EQB for Much Helpful Advice and Editing this Revision,
and also Bill, W∅MS for the August 2011 QST article on the transmitters.