Replacing tropical fish capacitors

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Krolroger Posted: Thu, Sep 15 2016 7:13 PM

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Hi All,

I'm looking to replace some blistered/flaking/cracked "tropical fish" capacitors on the AM board (PC4) of a Beomaster 2200.  They may still be functional but they are too low a value to measure on an ESR meter.

There are four of them: 0.1uF ± 20% rated at 250v.   The leads are 1 cm apart.

Does anyone have any recommendations as I'm not sure what would be a suitable replacement?

Thanks again,

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Dillen replied on Fri, Sep 16 2016 6:50 AM

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They are polyester capacitors (not electrolytics), measuring their ESR won't really tell you anything.
Don't worry too much about cracking outer coatings. They'll be fine, I'm sure.
But if you must replace them, I would suggest new polyester caps. The "orange drops" or green mylar would both be good choices.

Something like

http://www.ebay.co.uk/itm/10-x-0-1uF-100nF-104-Polyester-Film-Capacitor-100V-max-1st-CLASS-POST/291425877207?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D38661%26meid%3Daf05db01a9ba4a8bbec5e8c0375558c0%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D361625558476

or

http://www.ebay.co.uk/itm/20-Polyester-Poly-Film-Capacitors-100nF-100V-059S-/361625558476?hash=item5432901dcc:m:mnDIJXJPLknPFMTlGPqi8lw

Martin

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Krolroger replied on Fri, Sep 16 2016 5:47 PM

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Martin,

Thanks again.