UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Vidor 254 “All Wave AC-DC Three” (Circa 1936)

Tantanometer · 4th Feb 2021, 5:58 pm

Firstly a big thank you to all who have posted such positive comments, it's a great morale boost and makes me less nervous after having been persuaded to submit a full-fat version to The Bulletin.

Yes, Stef's comments about the wavechange switch are spot on. It comprises nine springy single pole contacts operated by a set of cams. Several contacts needed considerable straightening and I had to clean almost all of them with a diamond spatula before any continuity was obtained. Probably the reason they were bent in the first place was as a result of many contact cleaning events over the years. The cams rotate through 90 degrees for each step of the switch and the detent mechanism is vague but it helps a bit when the knob is fitted because you can then see the position of the four coloured dots.

Thanks. Len

4th Feb 2021, 5:58 pm	#8
Tantanometer Triode Join Date: Oct 2019 Location: Virginia Water, Surrey, UK. Posts: 25	Re: Vidor 254 “All Wave AC-DC Three” (Circa 1936) Firstly a big thank you to all who have posted such positive comments, it's a great morale boost and makes me less nervous after having been persuaded to submit a full-fat version to The Bulletin. Yes, Stef's comments about the wavechange switch are spot on. It comprises nine springy single pole contacts operated by a set of cams. Several contacts needed considerable straightening and I had to clean almost all of them with a diamond spatula before any continuity was obtained. Probably the reason they were bent in the first place was as a result of many contact cleaning events over the years. The cams rotate through 90 degrees for each step of the switch and the detent mechanism is vague but it helps a bit when the knob is fitted because you can then see the position of the four coloured dots. Thanks. Len