UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Williamson stereo pair, a good idea or not?

Bill · 12th Apr 2021, 11:20 am

I have 3 Williamson o/p transformers, one Partridge WWFB/.95 and two Gardners OT736. I have in mind a project to build a pair of amplifiers to original design but using 807s instead of KT66. I have a 400-0-400, 300mA mains tx , would this be enough to supply both amps, using 2x CV378/5U4 with separate chokes and filtering? Apart from considerations of efficiency and weight(!) would these sound any better than the Leak Stereo 30+ that I currently listen to? Possibly a mad project, but I do have most of the serious parts for this.Also, what is the power rating for these O/P txs? The specs say 20w but they look more than capable of 100w?The primaries are 10k a to a. Thanks.

12th Apr 2021, 11:20 am	#1
Bill Pentode Join Date: Dec 2005 Location: Denton, Manchester, UK. Posts: 188	Williamson stereo pair, a good idea or not? I have 3 Williamson o/p transformers, one Partridge WWFB/.95 and two Gardners OT736. I have in mind a project to build a pair of amplifiers to original design but using 807s instead of KT66. I have a 400-0-400, 300mA mains tx , would this be enough to supply both amps, using 2x CV378/5U4 with separate chokes and filtering? Apart from considerations of efficiency and weight(!) would these sound any better than the Leak Stereo 30+ that I currently listen to? Possibly a mad project, but I do have most of the serious parts for this.Also, what is the power rating for these O/P txs? The specs say 20w but they look more than capable of 100w?The primaries are 10k a to a. Thanks.