UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Valve Items - Philips/Mullard Rimlock-to-Noval Transition

kalee20 · 16th Sep 2019, 9:46 pm

I'm sure I have seen a similar B8A valve... But it brings the hard pin query back. If the glass base and the body were fused together with the B9A process, ie locally raised to the softening point of glass so they weld together, then there is the possibility of the pins moving fractionally out of position, which would mean they would need to be soft enough to bend back into alignment without fracturing the glass.

16th Sep 2019, 9:46 pm	#49
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,081	Re: Valve Items - Philips/Mullard Rimlock-to-Noval Transition I'm sure I have seen a similar B8A valve... But it brings the hard pin query back. If the glass base and the body were fused together with the B9A process, ie locally raised to the softening point of glass so they weld together, then there is the possibility of the pins moving fractionally out of position, which would mean they would need to be soft enough to bend back into alignment without fracturing the glass.