Replacing nichicon Dual-C 10.000uF cap - Page 1
Forum section: electronics / repair

author: EifX
author_rank: Contributor
timestamp: September 08, 2020, 04:25:29 pm
content: Hi there,I am restoring a Sony TA-2650 amp and came across a bad Nichicon Dual-C 10.000uF dual capacitor. See the attached picture.I have searched the interweb for this but didn't find anything yet. Maybe I could replace this cap with 2 separate 10.000uF caps?Does anyone have any advice on how to do this?Thanks in advanced.EifX

author: coromonadalix
author_rank: Super Contributor
timestamp: September 08, 2020, 04:35:43 pm
content: you could with "wearing gloves and visage protection" open the capacitor and put 2 separate capacitors in it ? for the look ?? or try to build a round pcb as a base and solder 2 caps on it, mimicking the pinout ?

author: EifX
author_rank: Contributor
timestamp: September 08, 2020, 08:56:59 pm
content: Did you perform this procedure yourself?I find it a little rich for my taste. But i will consider it and think about it.

author: aqibi2000
author_rank: Regular Contributor
timestamp: September 08, 2020, 10:11:27 pm
content: Find the gnd on the board and then put 2 caps

author: coromonadalix
author_rank: Super Contributor
timestamp: September 09, 2020, 02:33:46 am
content: yep i did it but it was aluminum casing capacitors, you could cut it near the botom edge ... but not necessarly applicable to a modern versionBut try to find axial capacitors and hot glue them together and do the proper connections ??

author: andy2000
author_rank: Frequent Contributor
timestamp: September 09, 2020, 02:18:57 pm
content: If you care how it looks, then you can try to install new caps inside the can, as others have suggested. If not, then you will probably have to go with two separate caps. Are you sure it's bad?I see some crusty residue around the bottom. If that's the reason you are replacing it, are you sure it's not just old adhesive?

author: EifX
author_rank: Contributor
timestamp: September 24, 2020, 02:01:29 pm
content: Hi and thanks for all the replies.The cap is really bad. It has just 1/2 of its capacitance.I ordered a 22.000uF cap that is smaller than this dual-C cap and will try to fit it in the original capacitor housing.

author: SeanB
author_rank: Super Contributor
timestamp: September 24, 2020, 04:40:21 pm
content: They are separate, 2 10000uF capacitors will likely fit in the volume easy enough, and if you use 105C versions they could probably be dropped in value to 8200uF anyway, which will make the bridge rectifier diodes feeding them suffer less from the massive peak current each cycle charging them back up. The 6.3A fuses would also not be so prone to blowing either, but in any case I would suggest replacing those 2 6.3A slow blow fuses on the transformer secondary anyway, they likely are pretty well worn from all those turn on surges by now.

author: Franzi_French
author_rank: Newbie
timestamp: January 06, 2025, 01:20:16 pm
content: Hi,Sorry for the delay but i think i have the same problem with my Sony TA-3650.If you are always here, can you answer me if you solved your problem ? if yes do you have some information or picture of your result ?ThanksOlivier

author: squadchannel
author_rank: Frequent Contributor
timestamp: January 06, 2025, 02:50:28 pm
content: Not him, my experience.japanese products until about the 1990s often used such dual/triple capacitors. was probably due to space advantages.Unfortunately, such capacitors are not available today. if they are available, they are either not a well-known brand or made in China.when I repair such products, always recap with two or three ordinary radial type capacitors.Nichicon's UCY series, for example, is a 105°C product with a high voltage rating that can be used as capacitors for tube amplifiers.I have decided to use only Nichicon capacitors, so I look for the ones can use from Nichicon's catalog.Whenever I recap, I always modify the capacitors so as not to spoil their appearance. Especially in tube amps, smoothing capacitors are sometimes a part of the appearance.At that time, a small capacitor or a bare capacitor would not look good.capacitors shrink wrap can be easily removed. xacto knife can be used to cut about 2 mm above the bottom of the capacitor and push the capacitor out of the head.The aluminum casing of the capacitor is folded over at the bottom. When the fold is removed, the terminal plate at the bottom comes off and the capacitor body inside comes out.inside of the capacitor is hardened with wax. If it is old, it may be tar.always difficult to clean the inside. I take some of it beforehand because it is pliers, and I clean it while melting the wax with paint thinner or something. IPA is ineffective.is now very inexpensive to fabricate pcbs, we order a board from JLCPCB for each capacitor we recap.new capacitors and terminal are attached to that pcb and repacked in the casing.PCB is not always necessary. my commitment.