[ortek_service]

Originally Posted by GeraldSommariva

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From the catalogue ( https://sites.google.com/view/transam-triton/transam ) the transformer only cost £7.00 I wonder how much it would be to have one made today given its unusual 8.5 volts secondary winding.

Quite a while ago, in 1996/7 Catalogue Maplin used to sell DIY mains-transformer kits with ready-wound primaries: 20VA @ £9, 50VA @ £11 & 100VA @ £14. So were useful to make your own custom-secondary one.
But they'd dropped these by 2005 catalogue, in their phasing-out of stocking much in way of Electronics parts, before eventual collapse years later.

Although maybe others still do these, otherwise it's probably a case of using 2 different ones or a small DC-DC converter to generate lower power rails from the main DC supply.

I once bought a 20VA kit as 1.5V 1A? transformer on old Gas fire / back-boiler for Glow-plug igniters was NLA from the appliance manufacturer / couldn't find any other ones elsewhere.