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

stevehertz · 31st May 2020, 2:12 pm

If you know which winding is the primary, then bring it up on a variac and see if you can make sense of what's coming out of the secondaries, for example, as you say, they might be 6.3V. So, if you get 6.3V out of a secondary when the input is say 120V or so, there you have it, it's a 120V mains trannie.

31st May 2020, 2:12 pm	#3
stevehertz Dekatron Join Date: Sep 2011 Location: Rugeley, Staffordshire, UK. Posts: 8,832	Re: How to identify an unknown transformer. If you know which winding is the primary, then bring it up on a variac and see if you can make sense of what's coming out of the secondaries, for example, as you say, they might be 6.3V. So, if you get 6.3V out of a secondary when the input is say 120V or so, there you have it, it's a 120V mains trannie. __________________ A digital radio is the latest thing, but a vintage wireless is forever..