3 Transistor 50MHz FM transmittor by JF1OZL
In Japanese CQ magazine, I informed about my 3 transistor CW transceiver (Jun1992) and 3 transistor SSB transceiver (Nov1992). I wanted to inform about FM transceiver, but it was not informed on that book.
http://www.intio.or.jp/jf10zl/3trfm.htm

One Transistor TX (50MHz DSB) by JF1OZL
I challenged to make very simple transmitter. It is constructed with only one transistor. It makes DSB signal. It can make QSO with normal SSB station.
http://www.intio.or.jp/jf10zl/1trtx.htm

Two types of 3 transistor 50MHz DSB transmittor by JF1OZL
I will show you two types of DSB transmitter. ** Type1 uses active modulator. Type2 uses passive modulator. Each type outputs the same 100mw power. And also each type uses three transistors.
http://www.intio.or.jp/jf10zl/3trdsb.htm

The 6 Metre Beacon Project by GJ3RAX
A few years ago I was asked, by Geoff GJ4ICD, to help design and make some beacons for the 6 metre band. These were to be sent to various parts of the world which were not covered by existing beacons.
http://www.uksmg.org/content/6metrebeacon.htm

VHF signal generator by JF1OZL
I made a simple VHF signal generator in order to measure the characteristic of low pass filter. The filter is made to use on 50MHz SSB transceiver.
http://www.intio.or.jp/jf10zl/vhfsg.htm