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Cardboard cover on can capacitior.
Cardboard cover on can capacitior.
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Old 20th November 2019, 11:33 PM   #11
maxhifi is offline maxhifi  Canada
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Join Date: Oct 2005
Quote:
Originally Posted by Galu View Post
It's a Rogers HG88 Mk3 - new caps and going strong after 50 years of ownership!
Cool! Looks like a really nice amp (had to look it up). Only thing I know about Rogers amps is the feature Hi-Fi world did on the Cadet back in the 90s. Always been impressed by the neat appearance of the internal wiring of UK made amps.
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Old 20th November 2019, 11:55 PM   #12
Galu is offline Galu  Scotland
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Here's a pic showing the insulated voltage doubler capacitor in the Cadet Mk3.
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File Type: jpg Cadet 3 capacitors.jpg (183.8 KB, 80 views)
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Old 21st November 2019, 12:22 AM   #13
kodabmx is offline kodabmx  Canada
Spreading triode love.
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Join Date: Oct 2011
Location: Toronto
Cardboard cover on can capacitior.
Maybe it's too obvious but why don't you meter it? Your ohm meter will tell you if the cap is connected to the chassis in normal operation, no?
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Old 22nd November 2019, 10:57 AM   #14
Mark Tillotson is offline Mark Tillotson
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Join Date: May 2018
Location: Cambridge UK
It should be a waxed cardboard to prevent moisture making it conductive. These days a large size shrink-wrap cover would be used although it won't cover the end fully unless an insulating disc is incorporated.
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Old 22nd November 2019, 01:44 PM   #15
charnich74 is offline charnich74  United States
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Join Date: Nov 2019
Quote:
Originally Posted by Mark Tillotson View Post
It should be a waxed cardboard to prevent moisture making it conductive. These days a large size shrink-wrap cover would be used although it won't cover the end fully unless an insulating disc is incorporated.
I actually re-installed it yesterday. I ended up re-coating the inside of the cardboard sleeve with a product called liquid electrical tape.
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