W5USJ's Tiny Tornado in a Tiny Tin
Chuck Carpenter, W5USJ
Here's the complete rig built into a small mint tin.
The key and headphone jacks are in the cover. The capacitor switch is in
the bottom top left corner. The antenna jack is a miniature audio type
thing and is in the bottom lower left front corner. The power lead is
direct wired in from the bottom right front corner.
And here's Chuck's complete Tiny Tornado Station.
The keyer is a PK-3 memory keyer kit built in a small cast aluminum box.
The transmatch is a hybrid of circuits from the ZM-2 and a Charlie Lofgren
coil design. It's built for coax only. I used a T130-6 for the
transformer. Also used some 5 Watt thick film 51 ohm resistors for the
bridge so I can run a full QRP gallon into it during tune-up.