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Search: Posts Made By: JDW.
Forum: General Capacitor Questions & Issues 10-04-2019, 02:51 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Yes, that's what I have been saying. It's simply a lack of a full schematic that necessitated experimentation with various capacitors on my part to find the right one -- one that is still commonly...
Forum: General Capacitor Questions & Issues 10-03-2019, 03:18 PM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Consider well what I discussed before. The Nichicon capacitor I used originally had even lower ESR but the performance was worse, resulting in higher amplitude ESL spikes and a 1 kHz audible beep...
Forum: General Capacitor Questions & Issues 10-03-2019, 12:06 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

I purchased 3 capacitors from Mouser, and measured data using my DE-5000:

Illinois Capacitor 228CKS010M...
Forum: General Capacitor Questions & Issues 09-14-2019, 04:22 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Yes, I had seen that chart when I visited the Rubycon website, but it does not mention the SH series from the 1980's, which isn't too big a surprise since I cannot find a mention on their website of...
Forum: General Capacitor Questions & Issues 09-13-2019, 10:40 PM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Well, it's certainly not sold on Mouser. And since I usually share my recapping knowledge with others in the form of a replacement capacitor list, a readily available replacement capacitor that...
Forum: General Capacitor Questions & Issues 09-13-2019, 03:30 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Here's the YXA datasheet (http://www.rubycon.co.jp/en/catalog/e_pdfs/old/aluminum/e_yxa.pdf) and this page (http://www.rubycon.co.jp/en/products/old_replace/index.html) says it was last sold in 2012.
Forum: General Capacitor Questions & Issues 09-13-2019, 03:17 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Where precisely do I find the datasheet for the Rubycon SH-series? That's really the foundation question upon which I built this discussion. I don't know who to ask or where to look.

Thanks.
Forum: General Capacitor Questions & Issues 09-12-2019, 06:04 PM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

But where can I buy those? I am only finding YXG, YXH, and YXJ on Mouser, in the diameter and length required to fit onto my PCB.
Forum: General Capacitor Questions & Issues 09-12-2019, 03:25 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

I purchased all the caps for my Apple HS20SC external hard disk enclosure's power supply. It works OK with my replacement caps, but my replacement for the Rubycon SH-series 10V 2200uF capacitor is...
Forum: General Capacitor Questions & Issues 05-22-2019, 03:37 PM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

There is no confusion and I appreciate your comments to date. I simply look forward to hearing specific advice regarding the specific capacitors that Iíve been mentioning, rather than general advice....
Forum: General Capacitor Questions & Issues 05-20-2019, 06:30 PM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Thank you for the replies. You listed a variety of 2200uF caps rated for 6.3V. The stock cap of that same capacitance in the HD20SC power supply are these two:

C214: 2200uF 10V, D=12.7mm...
Forum: General Capacitor Questions & Issues 05-17-2019, 07:24 PM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Thank you for the advice.

I am unable to find the PM or PS or PL series Nichicon capacitors your suggest on Mouser for the sizes I need. But this Nichicon chart...
Forum: General Capacitor Questions & Issues 05-17-2019, 03:30 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Here are my photos of the HD20SC SONY PSU (https://www.icloud.com/sharedalbum/#B0wGQOeMmGzwJPA) from 1988, which uses mostly Rubycon caps. (I'll talk about my CRT yoke board with Sprague caps in a...
Forum: General Capacitor Questions & Issues 05-16-2019, 03:10 AM
Replies: 29
Views: 2,485
Posted By JDW.
Re: Macintosh polymer recap & ESR considerations

Thank you!

Alas! No Sprague (non in the Vishay folder either). :-(

The Rubycon datasheets at that link all seem to be rather new -- nothing from the 1980's that I can see. Ditto for the...
Forum: General Capacitor Questions & Issues 05-15-2019, 11:48 PM
Replies: 29
Views: 2,485
Posted By JDW.
Macintosh polymer recap & ESR considerations

Does anyone have access to old electrolytic capacitor datasheets from the 1980's and 1990's?

I am trying to determine what the typical ESR values were for various capacitors of that era. It's...
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