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View Full Version : Capacitor identification please


andyrlb
15-03-2020, 08:09
Morning all.
You’ll probably confirm that I do have a screw lose when you read this .
I have my Tannoy SRM12x speakers that I recapped back in January with equal value Ansar supersound capacitors , and gave them 3 months of daily usage to burn in but I was never happy with the sq so 2 weeks ago I put all the old capacitors back in and hey presto the magic was back , some had strayed from 6.8uf to 7.1uf ( I tested them all when I initially removed them ) . So I now have all 8 identical nos caps on their way to me ( they’re Philips) but I need to get 2 identical ones seen in the picture, there is no brand name on them , they measure 27mm x 8 or 9 mm and have 2.2 J 100 printed on them ( and the little wave thing )
Anyone know this brand ?
Ps : I am fully aware that I can replace them with similar ones .
https://uploads.tapatalk-cdn.com/20200315/ea3cabf8a843df78513838823aa47903.jpg
https://uploads.tapatalk-cdn.com/20200315/bef039f3e47a3d85ae695f74350dda65.jpg


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Puffin
15-03-2020, 08:29
They look to me like 2.2Ohm 100v MKT caps. Others opinions may vary.
andyrlb
15-03-2020, 08:39
They look to me like 2.2Ohm 100v MKT caps. Others opinions may vary.

Thanks for your input.


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fatmarley
15-03-2020, 09:06
2.2uf 100v - Most likely polyester.
andyrlb
15-03-2020, 09:16
Guys I know the values ! It’s written on it , it’s the brand I wish to identify. [emoji23]


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walpurgis
15-03-2020, 09:19
Plessey?
andyrlb
15-03-2020, 09:21
Plessey?

I’ll research those now. Hope you are well Geoff , ( I love these speakers)


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walpurgis
15-03-2020, 09:22
The difference between 6.8uF and 7.1uF is so small in value as to not be worth bothering about.
andyrlb
15-03-2020, 09:23
Ah now that’s what I was hoping to hear , Geoff to the rescue as always. Cheers


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andyrlb
15-03-2020, 09:26
Any idea why they sounded bad ( or not as good )with the allegedly quality supersound caps ?


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walpurgis
15-03-2020, 09:27
I’ll research those now. Hope you are well Geoff , ( I love these speakers)


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I'm a lot better mate, after a fairly radical but brief illness. That's why I was missing for a few weeks.

Yes, that particular era of Tannoys sound wonderful, I'm working on a ten inch variant myself.
walpurgis
15-03-2020, 09:35
Any idea why they sounded bad ( or not as good )with the allegedly quality supersound caps ?


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Hard to say. I stick with Alcaps on older speakers where I can. They have no snob appeal but just work and don't seem to compromise sound.
Firebottle
15-03-2020, 10:15
Definitely Plessey.

The different sound could be down to different dielectric, are the supersound all polypropylene? As surmised I think the Plessey is likely Polyester.
andyrlb
15-03-2020, 10:24
Dunno mate [emoji848]
yes others have confirmed that they’re Plessey and that they’re still in tolerance so I’ll leave them alone now .
Thanks for your input Alan

Andy


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Lawrence001
15-03-2020, 10:55
I've got (or had) a few that look like that put away for my old B&W DM2s, long since sold. I was told they were NOS. Don't know the values.

I can have a look but they'll be hard to find. I remember paying a few quid each, I guess they are now sought after for this very reason
andyrlb
15-03-2020, 11:09
I've got (or had) a few that look like that put away for my old B&W DM2s, long since sold. I was told they were NOS. Don't know the values.

I can have a look but they'll be hard to find. I remember paying a few quid each, I guess they are now sought after for this very reason

Don’t worry Lawrence, several have confirmed it’s a futile act . Cheers


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Lawrence001
15-03-2020, 11:40
Don’t worry Lawrence, several have confirmed it’s a futile act . Cheers


Sent from my iPhone using TapatalkFutile to find them or futile to change them? I probably still have mine, I just need to empty every box on the cupboard and under the bed to find them! Then check their values, but Plessey rings a bell in remember looking them up at the time, they were taken over by Marconi or something.
andyrlb
15-03-2020, 11:41
Futile to change them .


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Lawrence001
15-03-2020, 22:13
Futile to change them .


Sent from my iPhone using TapatalkFair enough I think I read they don't deteriorate like other types, I just wanted some spares in case they failed.
Made in 1968
15-03-2020, 22:24
Definitely Plessey.

The different sound could be down to different dielectric, are the supersound all polypropylene? As surmised I think the Plessey is likely Polyester.

Aluminium conductors, Copper leads but can be ordered in Silver, Polyprop dielectric I have always used Ansar cos they sound great & look Military grade & dont look out of place replacing the old Elcaps in vintage Crossovers.