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GB L516

This is for Milinia. It's a  bit of a rush scan; sorry re quality. I also have a much more comprehensive service manual, running to something like 60 pages or more, and another 30+ pages of a spares list. I'm happy to provide copies at cost of photocopying.

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Here we have a circuit diagram for an L516 amp.  The pre-war review and ad are interesting, as I have never seen a K or S version, and the H is obviously what we would call a Bell & Howell. Apart from the wattage of the lamp (and maybe of the amp?), I'm not sure what the difference is from the L516, for which I have a soft spot. I have acquired a number of them, partly for spares but mostly because I really dislike the thought of such superb machinery just going to the tip. They can be a bit noisy, but that's not really the point, is it?

I have 2 GB L516 machines that have been adapted in the same manner. Either can be connected to this box (left) which contains the necessary circuitry and transformers for the lamp and the speaker. One lead plugs into what was originally the resistance socket on the side of the machine, to connect the lamp and its transformer. To avoid trying to shoe-horn additional stuff into the main body of the machine,  the original speaker lead is used as far as the box, where various gubbins sort things out, so that a normal speaker can just be plugged into the box. This limits the high voltages to a short stretch between projector and box.

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