Subject: Re: P100 Bulls eyes need glasses? are out of focus help
Hi Bru,
My cars are 1939 so different P100 internals. But, firstly, it won't be focussing. To focus the bulb you need to slide it in or out of its holder, presumably there will be a locking screw or clamp. My car as purchased was really bad...didn't know until my first night-time drive. The lamps projected huge rings of light with black centres...so you couldn't actually see the road! To focus them you need a really dark area with ideally a dark wall to shine the light on, & from a good distance, experiment! Unfortunately I don't have my motoring books handy, but a really good set is called "Motor Overhaul & Repair", published by Newnes. They're not particularly rare & often come up on ebay. You could probably still buy a decent set for £10-£20 stirling. These cover jobs such as this in great detail. Probably best to check publication date as they were printed way into the sixties, so a pre-war (mine is 1940 so perfect for me!) to early fifties set would be good.
Back to your problem...the issue is more likely to be that an adjustable stop for the dipping mechanism needs re-setting. My P100s have solenoid dip whereas yours are probably mechanical? Whatever, follow the mechanism through, & hopefully you'll find an adjustment, a bent rod, or a stop needing a tweek!
Laurence