Technics ST-S4 Capacitors

[redrooster]

This Technics tuner has 3 bad caps together in a row they are bulging and leaking. I have never heard of these before? Gold Cap? 1.8volt,3.3f (I presume it means 3.3mf?) The service manual says they are double layer liquid electrolyte. Does anyone know anything about these caps,can I replace them with tantulum caps for instance? The service manual is next to useless I can hardly read it.Any help will be greatly appreciated.

[japlytic]

Re: Technics ST-S4 Capacitors

"3.3f" is 3.3 Farads, of which is regarded as a supercapacitor.
Supercapacitors (Panasonic calls them Gold Caps) are often used for memory backup during a power failure.

[Scenic]

Re: Technics ST-S4 Capacitors

those are most likely the backup power to keep the stations when it's unplugged (or turned off, if it has a hardware power switch)

not sure if this link will work, but this would be the cateory on digikey. 1.8V isn't available, but if you select 3.3f and tick "in stock", it'll show 4 results.

http://search.digikey.com/us/en/cat/...e-layer/131084

Probably wouldn't hurt if it was 2.7f or 3f either (apart from a somewhat lower amount of time it keeps the stations)
mind the dimensions though

[redrooster]

Re: Technics ST-S4 Capacitors

"3.3f" is 3.3 Farads, of which is regarded as a supercapacitor.
Supercapacitors (Panasonic calls them Gold Caps) are often used for memory backup during a power failure.

Thats a surprise,I was sure they were ordinary caps LOL. I live in the sticks and the local shop has only (Hy Cap 2.7volt 5farad)$3.50 each,would they work for me or do you think I should get the exact replacements?

[lti]

Re: Technics ST-S4 Capacitors

If all three caps are connected in parallel, you could replace them with two of those caps.

[redrooster]

Re: Technics ST-S4 Capacitors

If all three caps are connected in parallel, you could replace them with two of those caps.

Thats good I was hoping I could do something like that. Thankyou very much.