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Orakle42 · 5th Dec 2018, 6:14 pm

Hi David

If the transformer has a center tapped winding of 12-0-12 configuration the center should be to ground and the 2 12v connections to the bridge ac terminals. The bridge +VE output will be approx +12v off load relative to ground. Ignore the bridge -ve output which will be about -12v and leave floating. I understand from your earlier posts that only 2 diodes were present previously which would suggest that this is the rectifier configuration you have which is a standard bi-phase rectifier circuit. The use of the bridge usually eases installation and allows bolting to the chassis as a heatsink.
The negative arms are redundant unless you need a -ve supply.

Good luck!

Orakle42

5th Dec 2018, 6:14 pm	#28
Orakle42 Pentode Join Date: Nov 2015 Location: Maidstone, Kent, UK. Posts: 131	Re: Wireless Set 19 repairs question. Hi David If the transformer has a center tapped winding of 12-0-12 configuration the center should be to ground and the 2 12v connections to the bridge ac terminals. The bridge +VE output will be approx +12v off load relative to ground. Ignore the bridge -ve output which will be about -12v and leave floating. I understand from your earlier posts that only 2 diodes were present previously which would suggest that this is the rectifier configuration you have which is a standard bi-phase rectifier circuit. The use of the bridge usually eases installation and allows bolting to the chassis as a heatsink. The negative arms are redundant unless you need a -ve supply. Good luck! Orakle42