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Old 30th Jan 2019, 12:24 pm   #15
mark2collection
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Join Date: Jul 2010
Location: Royal Berkshire, UK.
Posts: 471
Default Re: Philco 333 'Haunted Radio' Battery to Mains Restoration

Apologies for the delay Dave (usradcoll1) in uploading the requested PSU schematic.

Shortly after repairing the Philco 333, my Father unexpectedly passed away and have since been otherwise occupied.

Schematic was drawn on Sunday 27th January, 2019, from my 'jotted' notes at the time of repair.

The PSU was made from 'bits I had', I am no designer either so the layout will likely be not ideal, but it works

Am open to suggestions/improvements on the design. Fuse values are 250mA for mains, 100mA for HT, and 250mA for heaters. I've tested the PSU to destruction too (deliberately!) to ensure my valves will not be harmed in the event of a mishap.

The set was used over the Christmas period & a few times since, Jack Hylton sounding very good through the set.

Mark
Attached Files
File Type: pdf Mains PSU Schematic.pdf (21.6 KB, 127 views)
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