I am repairing a pair of High Frequency horns on my XK150. I originally planned to send them out for overhaul but the sources I had listed, including Joe Curto, no longer repair them. I tested both horns and they do not work so I sourced a pair of capacitors to replace the original aluminum capacitors. I am using useful internet site from The Netherlands as documentation, which I recommend (www.bobine.nl/jaguar/13-electrical/lucas-high-frequency-horn-hf1748-on-jaguars-1953-to-1961/).
As a part of the repair set-up I need to check the points. This is causing a problem as when the adjusting screw is fully in or out I do not seem to get a points gap. I can only guess that the points are worn down. They look OK but not having a good condition example on hand I cannot tell.
Any help/advice gratefully received. I would prefer to retain the original Lucas horns as opposed to replacing them with Chinese copies.