This is an experiment. It is for amateur use only and I may have to take it down, the copyright holder being very much with us (and well worth your time, attention and memberhip).
But for now, a quick look at the project article that launched Fred Sutter's "QSL" transmitters, all using some version of the 6L6 tube:Readers with an eye to history -- or who notice the cut-and-paste -- should be aware the original schematic left out the cathode bypass condenser, replacing it with a direct connection. That meant the telegraph key wouldn't have worked, the transmitter would have been on all the time. QST published a corrected schematic the following month and I pasted that over the erroneous one.
(I have built my own copy of this little transmitter.)
For the record, this transmitter has a lot of exposed high voltage. It is inherently dangerous. Before building and operating such equipment, be certain you understand the risks.