Building The Small Wonder Labs SW40+

This blog will document the construction of the SW40+ qrp kit from Small Wonder Labs, as well as several planned modifications. The modifications include a digital frequency display, keyer, audio amplifier, RIT, and possibly some kind of internal battery. The SW40+ kit was started on Feb 17, 2011. Small Wonder Lab’s web site has several kits, including SW kits to cover different bands. Dave’s web site is here:

While waiting on the kit to arrive, a trip to the local junk store produced an old Johnson Messenger 123A CB, which would become the donor for the case for the SW40+. Being “old school”, I have to admit that building an amateur transceiver into a CB case almost seemed sacreligious! (OK, true confession – I had a couple of CB’s back in the 70′s, and went by the handle “Buckeye.”) But since my first ham station consisted of a Johnson Viking II transmitter and a Hallicrafters SX-43 receiver, the Johnson Messenger seemed like a nice nostalgic touch!

My dad (SK) and his "shack" in the late 50's - early 60's. In 1976, he bought a Kenwood TS-120, and this (Johnson Viking II, Hallicrafters SX-43, Heathkit VF-1, Johnson Matchbox) became my novice station.

It took just a few minutes to remove the circuit board from the case.

Johnson Messenger 123A

Since I plan to add a N3ZI Digital Dial to the SW40+, I needed to enlarge the S-Meter opening in the case, and make room inside for the LCD display to mount. I opted to use a third party LCD display rather than the one that comes with the N3ZI kit, for its smaller size.

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