A couple of posts back, I explained how the bell code dinger mechanism had been fitted to the control panel and pondered on possible sources for a suitable battery holder for the PP9 battery.

Well, nothing appeared to be available commercially, so a custom made holder has been constructed from thick (1.2 mm I think) plastic sheet and attached to the side of the control panel with a couple of 8 BA screws and copious quantities of plastic solvent. The attached photos show the arrangement with the terminal connector held roughly in place using blu-tac. I suspect that actual electrical contact might be more effective in use!

Dave.