On a somewhat related note, however: the "Michigan Mighty Mite" transmitter design - as shown for the 3.5425 and 10.133 MHz beacons - is the basis of the SC Dasher PHFer beacon. The only changes required are the crystal and number of turns on the coil. Some guesswork got the first test unit transmitting into a dummy load, and subsequent work with the supplied turns-vs-frequency tables yielded a set of more accurate charts. It's a simple little transmitter, but it apparently gets out.