UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - DC Mains on Pre-War TV's

G6Tanuki · 10th Apr 2021, 5:55 pm

Fascinating find! I've never come across a vibrator-PSU intended for anything other than 6 12 or 24V DC input.

I'm not aware of any pre-WWII TV valves that were designed-from-the-outset for series-heater wiring which would have been the obvious way to do DC-only supplies. Indeed, some of the first-generation of post-WWII supposedly-intended-for-series-connection TV valves had heater-cathode insulation that could at best be described as 'problematic' - yes, Brimar. I'm looking at you.

10th Apr 2021, 5:55 pm	#2
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: DC Mains on Pre-War TV's Fascinating find! I've never come across a vibrator-PSU intended for anything other than 6 12 or 24V DC input. I'm not aware of any pre-WWII TV valves that were designed-from-the-outset for series-heater wiring which would have been the obvious way to do DC-only supplies. Indeed, some of the first-generation of post-WWII supposedly-intended-for-series-connection TV valves had heater-cathode insulation that could at best be described as 'problematic' - yes, Brimar. I'm looking at you.