SpitefulGOD wrote:
...
and is driving me mad. Does anyone know a way of generating a signal
...

Spiteful:

A simple oscillator, colpits, hartley, etc., powered by a rectified,
unfiltered dc power supply will play havoc with the band the osc is
designed for (use a low-Q tank circuit.) You should be able to find
schematics on the net.

If this isn't powerful enough, add an rf amp behind the osc.

Regards,
JS