UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Megger. Evershed & Vignoles hand crank

Techman · 28th May 2022, 2:33 pm

No problem re any hijack chaps, all information related to the technology is very welcome!

I've been side tracked on various other things, so not done any more with it, but removing the generator and cleaning the rotor/commutator and brushes may be worth while, although the voltage output is so stable when it gets there that I wouldn't have thought that it would be caused by this, but you never know. Loss of magnetisation mentioned is another possibility. It's a shame the original faulty bobbin has been removed to make space for those resistors - I'm sure there would have been room to leave it in place, but let's face it, it would have just been a repair at the time to get it going again and not to preserve the original innards a vintage item.

It's still very useful at 350 odd volts, as it's ideal for testing most vintage capacitors etc...and I like preserving vintage components such as those if at all possible.

28th May 2022, 2:33 pm	#18
Techman Dekatron Join Date: Nov 2009 Location: Lincolnshire, UK. Posts: 5,000	Re: Megger. Evershed & Vignoles hand crank - series 2? No problem re any hijack chaps, all information related to the technology is very welcome! I've been side tracked on various other things, so not done any more with it, but removing the generator and cleaning the rotor/commutator and brushes may be worth while, although the voltage output is so stable when it gets there that I wouldn't have thought that it would be caused by this, but you never know. Loss of magnetisation mentioned is another possibility. It's a shame the original faulty bobbin has been removed to make space for those resistors - I'm sure there would have been room to leave it in place, but let's face it, it would have just been a repair at the time to get it going again and not to preserve the original innards a vintage item. It's still very useful at 350 odd volts, as it's ideal for testing most vintage capacitors etc...and I like preserving vintage components such as those if at all possible.