[CW] Good Sounding Sidetone or Code Practice Oscillator Kit

[Craig Roberts]

How about building a one-tube CPO from one of the classic circuit? My 
first homebrew project back in the early 1960's was a code practice 
oscillator from the 1955 edition of the ARRL's "Learning the 
Radiotelegraph Code" booklet. The little manual's available from several 
eBay sellers. Be sure to get a 1955 or 1963 edition, since the later, 
1970 version (I believe) used a transistor circuit.

73,

Craig
W3CRR