UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

ekjdm14 · 12th Jun 2019, 5:09 pm

Right, stripped the OPT to see where it was damaged & noticed there was a break right at the end of the winding. A little microsurgery later has a turn unwound from it and re-soldered in place, however I do think there's some pretty badly shorted turns since it now seems to measure in the region of 6 ohms (there does appear to be a burned spot in the waxed paper on one edge, halfway through the winding).

Will have to sanity check my readings as spec is 700R so will have to make sure I didn't have the wrong range selected but I'm thinking a replacement is on the cards for testing at least. I wonder what shape the output valve is going to be in though, hopefully the OPT has been the "fuse"!

12th Jun 2019, 5:09 pm	#30
ekjdm14 Banned Join Date: Feb 2019 Location: Congleton, Cheshire, UK. Posts: 609	Re: Bush RG73 advice please. Right, stripped the OPT to see where it was damaged & noticed there was a break right at the end of the winding. A little microsurgery later has a turn unwound from it and re-soldered in place, however I do think there's some pretty badly shorted turns since it now seems to measure in the region of 6 ohms (there does appear to be a burned spot in the waxed paper on one edge, halfway through the winding). Will have to sanity check my readings as spec is 700R so will have to make sure I didn't have the wrong range selected but I'm thinking a replacement is on the cards for testing at least. I wonder what shape the output valve is going to be in though, hopefully the OPT has been the "fuse"!