William Jover made some very fine guns, first as a partner in Nock, Jover and Green at 83 Long Acre from 1775 -, then as Jover and Bolton, then as Jover and finally as Jover and Son from 1784. He didn’t have the same high output as the Mantons or Nock, but was in the same league in terms of quality.
I am putting this up in case anyone needs to do the same – I have a SIP P178 HF welder and wanted to get lessons in precision TIG welding from Jason McDougall, who said that without a foot pedal control on the current and stop start I wouldn’t get very far! Welders with foot controls don’t come cheap, and I didn’t want to scrap my almost new SIP, so I had a look around to see if I could fit a pedal control. No info on the web that was relevant, although there were a few pics of pedals, and unfortunately no circuits available for that model. Under the hood I found the current knob was a dual gang potentiometer of 1K Ohm resistance, which was a bit of a problem, as I would have to substitute my pedal for this potentiometer – I couldn’t find suitable 1K slide potentiometers to make my pedal from, so ended up with a bit of a Heath Robinson arrangement with a cord running round a drum that sat between two 1K rotary potentiometers moved by an arm on the pedal – after a bit of messing about I put in a sprung idler pulley to keep tension on the cord and a microswitch that operated right at the top of the pedal movement – doesn’t quite cover the full range of the pots but probably goes to 120 amps – so far so good….
Have a look at the build log for the new roof…