An Updated Universal QRP Transmitter  Errata
QST April, 2006
Looking for a project that will let you try some of your own "scratch built” ideas? Here is a starter low power transmitter circuit for that pursuit. 

A Multimode Phasing Exciter For 1 to 500 MHz
QST April 1993, pp. 27-31
A simple transmitter that generates SSB, CW and more. (a mate to High-Performance, Single-Signal Direct-Conversion Receivers, the article that describes R2 receiver designed by Rick Campbell, KK7B )

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A 6L6 Classic transmitter by Niel Wiegand, W0VLZ based on the 1939 edition of the Stancor Hamanual.