A colleague on another forum has acquired a Williamson amplifier (homebrew, I think) with a power supply based on mains transformers and choke branded FP Manchester. Given the very high 580-0-580 secondary voltage of the HT transformer these might well have been 're-purposed' from another piece of kit.
Does anyone know of this manufacturer ? I had a look through the Williamson amp reprint brochure from Wireless World and there are ads for quite a few transformer suppliers in there. But not FP.
There are a few more high-resolution pictures here
https://audioabattoir.com/t/transfor...any-ideas/6600. The possibility of Ferranti Packard was raised but doesn't seem likely (very different construction style and branding).
Cheers,
GJ