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|    sci.electronics.basics    |    Elementary questions about electronics    |    72,318 messages    |
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|    Message 70,645 of 72,318    |
|    jurb6006@gmail.com to Perhaps I didn't    |
|    Re: sci.electronics.basics, Would You Li    |
|    07 Jul 18 12:34:47    |
      >"** Here comes the same old bullshit plus a massive context change."              Friendly as ever.               >"> >"** For that to be the case, YOU have to know in ADVANCE what the       > acceptable ESR readings are for each electro you need to test. "       >       >       > Not so much.       > "              Didn't YOU recently say if they read bad they should be replaced before they       shit all over the PC board ? (I think i put it more eloquently)              And, are you saying that being subjected to more ripple current DOESN'T       shorten the life of a lytic ?               Another thing I've discovered it that in much modern shit, the value means       very little. In fact on a PC motherboard or the PS of a TV they might have a       bank of 5 3,300 uF on a certain output, and the ALL go bad.               Well I learned that people will put up with screen defects and shit like that       and it could need a screen or a Tcon, but they didn't mention that, and when       that problem shows up of course it is your fault.               So instead if replacing all 5 of those caps, mounting them nice on the board       and cutting the leads off, I would pull one and throw a 1,000 in there with       the long leads attached. One of my bench caps. And get this, my sister's       monitor, I found a bad cap        in its PS and didn't have one. It maybe was a couple of 2,200 uF or whatever       and all I had was an old 100 uF of the proper voltage rating. I put it in and       told her that I will have to order the right caps for it and it is bound to       fail again, just let me        know when it does. Been about 5 years now.               >"> Yeah, double or even triple the secondary voltage and the condition       > of the caps becomes quite important.       >               ** Insane crap !!!!!!!!!!!!!!!!!!!!!!!!!!.               All the HV electros would EXPLOD if you did that. "              Perhaps I didn't write it right. some of those things have doublers, maybe       even triplers, I am not talking ME doubling or tripling anything. In such a       configuration the ESR of all the lytics are effectively in series and that is       what makes it more        important. In such a case each got the same abuse all its life and is the same       age so I would recommend replacing them all even if only one is bad.               >"** 2 digit resolution is hardly excessive. "              Still not needed. I got no digit resolution. Just a bar graph display. In fact       I am thinking I don't even need that many segments. So 8 might do and then I       just use 2 quad comparators. Open collector outputs would work and probably       have less power drain.               >"** The fool's device exist only in his imagination. "              Same with the Wolksvagon until Hitler came along.              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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