Mini-Mod MW 'Micro Transmitter'

[ppppenguin]

The BF244 FET is electrically identical to the BF256 but the gate is the middle lead. Both of these types come in A, B and C groups which have different cutoff voltages. I have no idea which group is best suited to this design. The 2N3819 is electrically fairly similar to the BF244/BF256 but with a very wide range of cutoff voltages.

As Horris has already said, Yorkie has done a lovely job on the box.