Hey Malcolm, I just read your bit about 'resistors', I actually solder in, what I believe, is a resistor. Make sure nobody else reads the following, but.....are resistors those tiny ceramic things that have little bands of varying colours and with a wire passing through it? I did some research on those and apparently the colour bands denote...is it milliamps? I downloaded a chart with the colours and what they represent and mine has a red, (could be orange as I can't tell, even with glasses on as they are so small), a white and 2 black bands and on looking it up it reads, I think, 290 whatever, or 390 whatever. This wouldn't be a current limiter would it? It actually gets warm when unit is 'working' also which suggests to me that it is a limiter. The 'backpressure' with water thing?
I bought a generator years ago and have been altering that generator, well the generator I bought was probably made in someones back shed anyway but the design of the inner workings would still be the same, I'm just making slight alterations to how it goes together for cosmetic purposes, eg; removable electrodes instead of soldering them onto a board. Banana connectors for the electrodes so that the unit stores away neater if you see what I mean. Neville.