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Old 13th Jan 2021, 6:42 pm   #2
Leon Crampin
Octode
 
Join Date: Nov 2005
Location: Surrey, UK.
Posts: 1,869
Default Re: When is a capacitor not across the mains.

When I restored my FB10/2, I fitted a 1250V working polyester capacitor in this position. The series resistor should be 75 Ohms (150/2). I always fit a 1A fuse to BS1362 in the plug of any set I restore - assuming surge current conditions permit.

I would not have any problem releasing a set so equipped, but would be mindful of its new owner - no small kids within reach, dry location, correctly wired and polarised mains socket etc.

One dubious aspect of the FB10 is the closeness of the chassis flange cutouts to the base retaining screws. If the chassis is not centralised relative to the cabinet, a screw head could become live with an incorrectly wired supply. It's just about OK with careful assembly - but my set's chassis was bent when I started work on it.

Leon.
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