10T639pp “Europa30” by JH5ESM
In 2005, I had organized a group purchase for European transistors. In this program, BC547, BC639, BD135, BD139 and TBA820M had been listed and about 20 Japanese hams had joined.
http://homepage3.nifty.com/jh5esm/homebrew/europa30.html

30m QRSS Junkbox Beacon by GØUPL
Here's a 30m QRSS beacon whose main objective is low cost and simplicity. I built this project entirely from junk box parts: the only component purchased specifically for this project was the 10,140kHz crystal ...
http://www.hanssummers.com/qrssjb.html

30m QRSS Beacon by GØUPL
A borderline insane 30m QRSS beacon project. The beacon contains an 8K EEPROM (28C64 chip) of which only 1K is used. It is programmed by hand from front panel switches.
http://www.hanssummers.com/qrss.html

A Two-transitor Transmitter for 30 Meters by KB4PY
When I decided to become active on the 30-m band, I wanted to build a simple transmiter. I have a Yeasu FT-101E that receives WWV on 10MHz. Others may have general-coverage receivers, and need only a transmitter.
http://www.arrl.org/tis/info/pdf/8402046.pdf