[dominicbeesley]

If you're having trouble getting colour out of the beeb it might be that the colour subcarrier frequency is out. This could be either a dead/dirty crystal, or more likely it just needs a twiddle - there's a small variable capacitor trimmer next to the crystal, about 1" soutwest of the modulator try giving that a twiddle. My recently exhumed Electron needed that doing to get my Sony Pro monitors to believe it was colour!