LM317 Voltage Reguletor TX What? Yes, extreemly simple single chip, tansmitter. Ideal for low frequency hamming. If you can get 5W/AM by modulating this simple TX, that will be your Top Band Chat-Box.
Logic Chip Tx Very simple Transmitter that can be used on 20, 15 or 10 meter band. Out put is about 500mW. Xtal Control. Only active component is a 74HC240 Octal inverting buffer!
5Watt Transmitter Simple Transmitter that can be used vertually on any band. Out put is about 5W. Single transister and driven by a TTL Logic chip. Xtal Control.
Tuna Tine Transmitter40m Xtal control two transister nice little transmitter that was orginaly built in a Tuna Fish Can. That does not mean that you too should built in one of those, but it is a nice idea for a simple case isnt it? How about a Pepsi or Coke Can (I have seen AM/FM BC radios made in those - factory stuff!)
Pippin 40m 2Transister TX40m Xtal control two transister nice little transmitter by G3PTO. It is simple but gives 1W Output in to a 50ohm load. The author says "The PA transistor has a "Stove Pipe" heat sink attached and has been left running continously for more than 1 hour without any complaint from the PA stage"