Plessey Red/Yellow/Black Electrolytics
 

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

Thanks,

Matt

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?

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....

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

Thanks for that - all is as expected!

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

Red = + it is.

Cliff

Thanks Cliff - I think it's pretty definitive then!