I have a scout set circ. 1960. It is plastic rather than wood. You have sounder mode, buzzer mode and and flashlight bulb mode. Made to work with keys wired to each other up to about 50 ft apart. Stil

Two thoughts: 1) the on-board coils may provide for extra coupling that toroids do not; 2) check the crystal itself. Once spent hours on an HW-101 and finally sent it back to Heathkit. It was a bad cr