Plessey Red/Yellow/Black Electrolytics - diyAudio
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Old 10th February 2011, 02:27 PM   #1
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Default Plessey Red/Yellow/Black Electrolytics

Can anyone please advise the polarity of the 1960s red/yellow/black Plessey electrolytics?
Picture attached.

Thanks,

Matt
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Old 11th February 2011, 12:03 PM   #2
DF96 is offline DF96  England
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My guess is red positive, black negative - this is a common colour convention. Can you work it out from how it was used in the circuit?
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Old 11th February 2011, 12:09 PM   #3
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I also presumed that this convention would apply. However, this is for my customer, who wants to be absolutely sure he's fitting it the right way round. Also I don't have view of the circuit. Ho hum. Thanks for your help....
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Old 11th February 2011, 06:19 PM   #4
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I used some of these back in the late 60`s. I always connected them red positve and black negative, never occurred to me to do anything else. They always worked.

Barry
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Old 14th February 2011, 10:01 AM   #5
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Thanks for that - all is as expected!
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Old 14th February 2011, 12:27 PM   #6
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Quote:
Originally Posted by MCampbell View Post
Thanks for that - all is as expected!

I worked in the Plessey factory in Swindon some 45 years ago .....

Red = + it is.

Cliff
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Old 14th February 2011, 12:51 PM   #7
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Thanks Cliff - I think it's pretty definitive then!
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