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Chris55000 · 7th Jun 2022, 8:04 pm

Hi!

I managed to get a "Purbeck" Oscilloscope in unknown internal condition with absolutely nothing on the CRT despite many experiments with all the controls, and a dim yellow "power" LED – I wonder if I've inherited another duff mains transformer? (I think it was 250–0–250V @ 60mA plus 13–0–13V @ 500 mA!) – I have a Farnell DTS12 which had the same symptoms, again from a duffy transformer with a s/c 600 V winding!

Alas to say I've not started the "Purbeck" yet as I'm trying to catch up on all the things that got behind when I couldn't work in our front room in the cold! (Thankfully now fixed with a new boiler for next winter!).

Chris Williams

7th Jun 2022, 8:04 pm	#71
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	Re: Magazine projects Hi! I managed to get a "Purbeck" Oscilloscope in unknown internal condition with absolutely nothing on the CRT despite many experiments with all the controls, and a dim yellow "power" LED – I wonder if I've inherited another duff mains transformer? (I think it was 250–0–250V @ 60mA plus 13–0–13V @ 500 mA!) – I have a Farnell DTS12 which had the same symptoms, again from a duffy transformer with a s/c 600 V winding! Alas to say I've not started the "Purbeck" yet as I'm trying to catch up on all the things that got behind when I couldn't work in our front room in the cold! (Thankfully now fixed with a new boiler for next winter!). Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed! Last edited by Chris55000; 7th Jun 2022 at 8:10 pm.