Capacitor date code
 

I have quite a few of the electrolytic shown. They appear to be made by BHC.
Can anyone de-cypher the date code? My guess is 1986.

Re: Capacitor date code
 

Week 20 of 1986 if the same date coding method as on I.C's.
Mike.

Re: Capacitor date code
 

Thanks Mike, that makes perfect sense.
Destined for the dustbin, I think.

Re: Capacitor date code
 

Probably re-formable - especially if they`ve never been used.

Plenty of equipment about still working with older caps than that.

Re: Capacitor date code
 

1986 is modern by our standards.
You can reform them easily using a pair of fridge bulbs in series and a diode.

Re: Capacitor date code
 

Agree! A useful value and certainly can be woken up. I have literally hundreds of new caps and they all reform. Give it a try. John.

Re: Capacitor date code
 

That looks like a replacement smoothing cap for a Philips G11 chassis. It's got the special riveted connections. The originals had a habit of going intermittent, causing a huge spike on the HT rail and ultimately the EHT and blowing a hole through the neck of the tube....

Don't throw them out. Either offer them here in the appropriate section or eBay them.

Re: Capacitor date code
 

Philips generally recommended reforming at near working voltage with a 47k resistor in series. You should be able to get hem down to 100uA or so after a few hours.