Richard,
Thanks for your reply....as you will have already ascertained, my knowledge in this area is less than comprehensive. I am led to believe that the issue relates to the Mallory opto-electronic pick-up, which eventually fails if it is exposed to 12v; it allegedly requires the notably lower voltage resulting from having the ballast resistor in the live coil feed. I'm hoping that the present set-up is the solution. It's been a frustrating journey to get here, as - whilst Mallory Unilites have a good reputation for quality engineering and reliability - there's no definitive edict regarding how to set them up. Hence I thought I would at least post on the forum to see whether I'm in a minority of one, or whether someone else has the magic configuration.
If I have any more issues (here's keeping my fingers crossed that I don't) then reverting to the standard ignition set-up would at least mean the "use this distributor/amplifier/coil" is well defined....along with perhaps carrying a spare rotor arm and amplifier unit.
Dave
