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Forum: General Electronics Technical Discussion 01-05-2021, 01:37 PM
Replies: 2
Views: 1,638
Posted By Cap_search
Smile Re: Values of ppm/C of 2 resistors in parallel

Hmm, so the tempco remains unchanged. Ok, thanks eccerr0r! :)

These are for emitter sensing resistors in a power amplifier (output stage).
I'm asking because the value required is about 0.5Ω, but...
Forum: General Electronics Technical Discussion 01-01-2021, 05:29 PM
Replies: 2
Views: 1,638
Posted By Cap_search
Question Values of ppm/C of 2 resistors in parallel

First of all Happier New Year to all,

Dear all, I hope I'm posting this in the right forum.

Ok, I'd like to know the final ppm/C of 2 identical resistors in parallel.

Given two same...
Forum: General Capacitor Questions & Issues 07-28-2019, 04:38 PM
Replies: 12
Views: 1,841
Posted By Cap_search
That's what I thought, too. Just wondered they...

That's what I thought, too. Just wondered they are usually bit larger than normal polarized equivalents. Grazie.
Forum: General Capacitor Questions & Issues 07-22-2019, 03:00 AM
Replies: 12
Views: 1,841
Posted By Cap_search
Re: Question about bipolar electrolytics

What about BP caps of 220uF or larger?
Forum: General Capacitor Questions & Issues 07-22-2019, 02:45 AM
Replies: 12
Views: 1,841
Posted By Cap_search
Lightbulb Question about bipolar electrolytics

Good morning all,

Is it true that all the bipolar electrolytics are made/manufacturered of two "back-to-back" polar electrolytics in the - + + - configuration, and that would explain why they are...
Forum: General Capacitor Questions & Issues 07-17-2019, 12:22 PM
Replies: 13
Views: 2,001
Posted By Cap_search
Re: Capacitor(s) Identification

Thank you Pete,

Do you think the yellow one is a metallized paper cap, or it's too small for that?
Regards.
Forum: General Capacitor Questions & Issues 07-16-2019, 08:42 PM
Replies: 13
Views: 2,001
Posted By Cap_search
Re: Capacitor(s) Identification

Sorry if I use this already open thread to ask about these caps, specially the yellow and blue ones (I know their values, but not the type)...

The yellow is a 100nF (10% tol.) but that "50SN (in...
Forum: Troubleshooting Computer Displays 02-07-2019, 02:01 PM
Replies: 661
Views: 359,950
Posted By Cap_search
Re: Samsung Syncmaster 225BW

I opened it today, just for a check, and wanted to measure the big cap 150uF/450V...

Cap measured 119uF. That's why it always seemed not that "bright" enough. A new 180uF/450V is in it now....
Forum: General Capacitor Questions & Issues 11-09-2018, 09:44 AM
Replies: 2
Views: 1,296
Posted By Cap_search
Re: Differences in Voltage rates with same capacitance

Thank you so much, PeteS in CA!! :smile:
Forum: General Capacitor Questions & Issues 11-08-2018, 12:58 PM
Replies: 2
Views: 1,296
Posted By Cap_search
Lightbulb Differences in Voltage rates with same capacitance

Good evening,

Given a cap value of, say, 100uF/10V (but can be any other), I'd like to know if there's much difference in (worse, better or no variation) performance comparing it to a, say...
Forum: Troubleshooting Computer Displays 08-25-2018, 02:57 PM
Replies: 661
Views: 359,950
Posted By Cap_search
Re: Samsung Syncmaster 225BW

Okay, from what I saw it's fine using higher value (but not much) as these Capxions drift a lot, and C113 can be a 220uF/35V.

Nice monitor! :)
Forum: Troubleshooting Computer Displays 08-25-2018, 01:02 PM
Replies: 661
Views: 359,950
Posted By Cap_search
Re: Samsung Syncmaster 225BW

Good evening all,

Sorry to bring it up and perhaps this was already discussed, but here we go:

1. is it mandatory to keep same capacitance values (820uF, 680uF, 330uF, 47uF, etc) when replacing...
Forum: General Capacitor Questions & Issues 05-13-2018, 05:39 PM
Replies: 12
Views: 2,404
Posted By Cap_search
Ok, thanks. 2 more questions: - for...

Ok, thanks.

2 more questions:

- for what is the use low leakage caps?

- and so the polymer hybrid caps?

I see that the latter has much better numbers on endurance, ripple current, very...
Forum: General Capacitor Questions & Issues 05-13-2018, 10:29 AM
Replies: 6
Views: 1,971
Posted By Cap_search
Re: identifying film capacitors

Hi, from which amp/AV amp are these components? Yamaha?
Forum: General Capacitor Questions & Issues 05-09-2018, 05:52 PM
Replies: 12
Views: 2,404
Posted By Cap_search
Lightbulb Film caps installed the right way

Wow! :eek:

I remember I had a couple of never fixed issues with amplifiers and now I start to think I might have installed some of them backwards!!

I just got a bit confused with the markings:...
Forum: General Capacitor Questions & Issues 05-09-2018, 07:16 AM
Replies: 12
Views: 2,404
Posted By Cap_search
Re: Matsushita blue caps from 1991?

Yes, NAD also has Lelon caps in many later models... These earlier HK amps sound pretty good. But so far, all the green TK caps (pictured above) are measuring lower, so I'll replace all of them....
Forum: General Capacitor Questions & Issues 05-08-2018, 02:23 PM
Replies: 12
Views: 2,404
Posted By Cap_search
Thank you very much guys. Yes, the caps in the...

Thank you very much guys. Yes, the caps in the first pictures (100uF/10V) are in the signal path. But these blue Matsushitas are pretty good indeed. Better than those "lavender" ones found in the...
Forum: General Capacitor Questions & Issues 05-08-2018, 10:10 AM
Replies: 12
Views: 2,404
Posted By Cap_search
Thank you very much, Agent. I kinda agree with...

Thank you very much, Agent. I kinda agree with you. There are some other caps in the local regulated supply (330uF) that are now lower in value (around 314uF) and I'm going to replace these with...
Forum: General Capacitor Questions & Issues 05-07-2018, 03:07 PM
Replies: 12
Views: 2,404
Posted By Cap_search
Lightbulb Matsushita blue caps from 1991?

Hello to all,

I have a question, maybe you can help me.

I have a Harman Kardon amp from 1991 and the input caps are 100uF/10V to the power amp section. I measured both caps (left and right...
Forum: General Electronics Technical Discussion 03-06-2013, 01:22 PM
Replies: 23
Views: 15,747
Posted By Cap_search
Re: ELNA Cap Identification

That is what we are talking about! :bow::bow:

Thank you so much! Precious real info! :rock:

Cheers! :)
Forum: General Electronics Technical Discussion 03-06-2013, 12:14 PM
Replies: 23
Views: 15,747
Posted By Cap_search
Re: ELNA Cap Identification

LOL! It was sarcasm fighting back. With pictures! ;)

I just wold like to know if someone knows WHEN those caps were manufacturated or if there is any datasheet for that series,
and not about the...
Forum: General Electronics Technical Discussion 03-06-2013, 11:29 AM
Replies: 23
Views: 15,747
Posted By Cap_search
Re: ELNA Cap Identification

But, most of the modern "K" marks are for those caps used in the signal path, right? And that these usually are "audio grade" mid-to-small caps, and not that good for the "power supply"??

BIGGER...
Forum: General Electronics Technical Discussion 03-06-2013, 01:05 AM
Replies: 23
Views: 15,747
Posted By Cap_search
Re: ELNA Cap Identification

I just cut right now the top black cover to inspect and it looks like this! :smile:

Good sign?? :d
Forum: General Electronics Technical Discussion 03-06-2013, 12:54 AM
Replies: 23
Views: 15,747
Posted By Cap_search
Re: ELNA Cap Identification

Oh!? :o:

But I took them from inside a mini Kenwood system similar to that below... :why:

http://i.ebayimg.com/00/s/NDQ1WDU5Mw==/$%28KGrHqRHJEkFBb%28!olR1BQ%28pHZESq!~~48_79.JPG
Forum: General Electronics Technical Discussion 03-05-2013, 10:19 PM
Replies: 23
Views: 15,747
Posted By Cap_search
Re: ELNA Cap Identification

I have the same caps, but no signs of date.

Only a code: 7528U
Showing results 1 to 25 of 28

 
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