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Old 25th Oct 2020, 10:49 am   #8
Lloyd 1985
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Join Date: Jun 2008
Location: Coningsby, Lincolnshire, UK.
Posts: 2,819
Default Re: R1155 Modern Power Supply

I got myself one of these sets earlier this year, it’s definitely worth having a good look at the chassis before trying to connect power, a lot of these have had extensive modifications, and could be a bit of a mess! It would be worth posting a few good pictures of above and below chassis.

I haven’t built a power supply for mine yet, I’ve been running it from a lash up consisting of a bench power supply for the heaters, and an isolating transformer feeding a variac to set the HT connected to a bridge rectifier and some caps, I don’t advise trying this though, better to have a proper enclosed dedicated power supply! I was lucky that whoever had the set before me had done the most minimal of modifications, just removing the DF valves, even going to the effort of insulating the top cap connectors and taping them to the chassis out of the way, and they fitted a really neat little 1 valve output stage on the underside of the chassis, which works well, and I might just keep it in place!

Regards
Lloyd
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