Plessey Red/Yellow/Black Electrolytics

MCampbell · 10th February 2011, 01:27 PM

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

Thanks,

Matt

DF96 · 11th February 2011, 11:03 AM

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?

MCampbell · 11th February 2011, 11:09 AM

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....

barrymagrec · 11th February 2011, 05:19 PM

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

MCampbell · 14th February 2011, 09:01 AM

Thanks for that - all is as expected!

cliffforrest · 14th February 2011, 11:27 AM

Quote:

Originally Posted by MCampbell

Thanks for that - all is as expected!

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

Red = + it is.

Cliff

MCampbell · 14th February 2011, 11:51 AM

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

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11th February 2011, 11:03 AM	#2
DF96 diyAudio Member Join Date: May 2007	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?

11th February 2011, 11:09 AM	#3
MCampbell diyAudio Member Join Date: Nov 2008	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....

11th February 2011, 05:19 PM	#4
barrymagrec diyAudio Member Join Date: Apr 2010	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

14th February 2011, 09:01 AM	#5
MCampbell diyAudio Member Join Date: Nov 2008	Thanks for that - all is as expected!

14th February 2011, 11:51 AM	#7
MCampbell diyAudio Member Join Date: Nov 2008	Thanks Cliff - I think it's pretty definitive then!