A40 Farina Club

I brought a dwell meter back last summer but I have no idea have to use it still. I think I have found an instruction manual for it however it does seem a bit blurred. Does anyone else know how to work these. It's the dwell feature that I'm most interested in. I suppose the points condition feature is handy too. Can anyone shed any light on this?

https://www.lrukforums.com/threads/guns ... une.42447/



file:///C:/Users/jg_pe/Downloads/Gunson%20testune.pdf

I have now found one which is not blurery!!

Thats a really old one with a copper shunt. really can't remember how to use it. I had the later one which iirc was pos meg and the other lead on the lt connector on the outside of the dizzy.