On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold <gherold@teachspin.com> wrote:>On May 2, 6:05=A0pm, John Larkin <jlar...@highlandtechnology.com> wrote: >> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com >> wrote: >> >> >4.7uF 6.3V X5R >> >dC =3D -70% @ 6VDC (!!) >> > ==A0http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf>> >> >James >> >> It's like a tantalum cap rated for X volts, with recommendation to >> never use it at X volts. >> >> (I actually use tantalum caps at rated voltage *if* there's not much >> charging current available. Otherwise, X/3 is about right.) >> >> -- >> >> John Larkin =A0 =A0 =A0 =A0 Highland Technology, Inc >> >> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.com >> >> Precision electronic instrumentation >> Picosecond-resolution Digital Delay and Pulse generators >> Custom laser drivers and controllers >> Photonics and fiberoptic TTL data links >> VME thermocouple, LVDT, synchro =A0 acquisition and simulation > >I've got this audio amp that runs off 15 volts. >But I've told people you can stick upto 40V into it. >(as long as it doesn't over heat.) >The IC's are good to 60V (I think, LM675?) but I've only got 50V tants >as bypass C's. I should do a mod to 100V tants. Someone will want >more V. > >George H.If it were me, i won't use a solid tant at more than 1/2 rated V. ?-)
Crapacitors
Started by ●May 2, 2013
Reply by ●May 7, 20132013-05-07
Reply by ●May 7, 20132013-05-07
On Tue, 07 May 2013 17:39:04 -0700, josephkk <joseph_barrett@sbcglobal.net> wrote:>On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold ><gherold@teachspin.com> wrote: > >>On May 2, 6:05�pm, John Larkin <jlar...@highlandtechnology.com> wrote: >>> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com >>> wrote: >>> >>> >4.7uF 6.3V X5R >>> >dC = -70% @ 6VDC (!!) >>> > �http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf >>> >>> >James >>> >>> It's like a tantalum cap rated for X volts, with recommendation to >>> never use it at X volts. >>> >>> (I actually use tantalum caps at rated voltage *if* there's not much >>> charging current available. Otherwise, X/3 is about right.) >>> >>> -- >>> >>> John Larkin � � � � Highland Technology, Inc >>> >>> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.com >>> >>> Precision electronic instrumentation >>> Picosecond-resolution Digital Delay and Pulse generators >>> Custom laser drivers and controllers >>> Photonics and fiberoptic TTL data links >>> VME thermocouple, LVDT, synchro � acquisition and simulation >> >>I've got this audio amp that runs off 15 volts. >>But I've told people you can stick upto 40V into it. >>(as long as it doesn't over heat.) >>The IC's are good to 60V (I think, LM675?) but I've only got 50V tants >>as bypass C's. I should do a mod to 100V tants. Someone will want >>more V. >> >>George H. > >If it were me, i won't use a solid tant at more than 1/2 rated V. > >?-)Why are you talking about tantalum caps in a thread about ceramic caps? You intentionally overgeneralized it from MLCC capacitor voltage coefficient in order to post something, however irrelevant. Raging Narccissist. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
Reply by ●May 8, 20132013-05-08
On Tue, 07 May 2013 19:03:16 -0700, John Larkin <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:>On Tue, 07 May 2013 17:39:04 -0700, josephkk <joseph_barrett@sbcglobal.net> >wrote: > >>On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold >><gherold@teachspin.com> wrote: >> >>>On May 2, 6:05�pm, John Larkin <jlar...@highlandtechnology.com> wrote: >>>> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com >>>> wrote: >>>> >>>> >4.7uF 6.3V X5R >>>> >dC = -70% @ 6VDC (!!) >>>> > �http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf >>>> >>>> >James >>>> >>>> It's like a tantalum cap rated for X volts, with recommendation to >>>> never use it at X volts. >>>> >>>> (I actually use tantalum caps at rated voltage *if* there's not much >>>> charging current available. Otherwise, X/3 is about right.) >>>> >>>> -- >>>> >>>> John Larkin � � � � Highland Technology, Inc >>>> >>>> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.com >>>> >>>> Precision electronic instrumentation >>>> Picosecond-resolution Digital Delay and Pulse generators >>>> Custom laser drivers and controllers >>>> Photonics and fiberoptic TTL data links >>>> VME thermocouple, LVDT, synchro � acquisition and simulation >>> >>>I've got this audio amp that runs off 15 volts. >>>But I've told people you can stick upto 40V into it. >>>(as long as it doesn't over heat.) >>>The IC's are good to 60V (I think, LM675?) but I've only got 50V tants >>>as bypass C's. I should do a mod to 100V tants. Someone will want >>>more V. >>> >>>George H. >> >>If it were me, i won't use a solid tant at more than 1/2 rated V. >> >>?-) > >Why are you talking about tantalum caps in a thread about ceramic caps?--- So, if a thread drifts because of your input that's OK, but if it drifts because of anyone else's, that's not OK? --->You intentionally overgeneralized it from MLCC capacitor voltage >coefficient in order to post something, however irrelevant. Raging >Narccissist.--- Pantywaist copycat. -- JF
Reply by ●May 8, 20132013-05-08
On Tue, 07 May 2013 13:52:45 -0700, John Larkin <jlarkin@highlandtechnology.com> wrote:>On Tue, 07 May 2013 15:26:41 -0500, John Fields ><jfields@austininstruments.com> wrote: > >>On Mon, 06 May 2013 22:26:54 -0700, John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >> >>>On Mon, 06 May 2013 21:05:15 -0700, josephkk <joseph_barrett@sbcglobal.net> >>>wrote: >>> >>>>On Thu, 02 May 2013 17:54:47 -0700, John Larkin >>>><jlarkin@highlandtechnology.com> wrote: >>>> >>>>>On Thu, 02 May 2013 18:29:42 -0500, John Fields >>>>><jfields@austininstruments.com> wrote: >>>>> >>>>>>On Thu, 02 May 2013 15:05:54 -0700, John Larkin >>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>> >>>>>>>On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodboat@yahoo.com >>>>>>>wrote: >>>>>>> >>>>>>>>4.7uF 6.3V X5R >>>>>>>>dC = -70% @ 6VDC (!!) >>>>>>>> http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf >>>>>>>> >>>>>>>>James >>>>>>> >>>>>>>It's like a tantalum cap rated for X volts, with recommendation to >>>>>>>never use it at X volts. >>>>>>> >>>>>>>(I actually use tantalum caps at rated voltage *if* there's not much >>>>>>>charging current available. Otherwise, X/3 is about right.) >>>>>> >>>>>>--- >>>>>>Actually, I think what's being commented on is the unexpected >>>>>>tolerance of the capacitance of the cap rather than the cap's >>>>>>likelihood of failure as a function of charging current/terminal >>>>>>voltage. >>>>> >>>>>What we're talking about is whether you can, in real life situations, >>>>>actually use an X volt rated cap at X volts. >>>>> >>>>No. JL. You intentionally overgeneralized it from MLCC capacitor voltage >>>>coefficient in order to post something, however irrelevant. Raging >>>>Narccissist. >>> >>>It would be a hell of a discussion group if nobody posted anything. >> >>--- >>And that justifies your posting nonsense just to keep yourself in the >>limelight? > >What's nonsense about using a capacitor's nonlinearity to build a >parametric frequency divider?--- No one said anything about the _nonlinearity_ of the capacitance change, the point was being made that the capacitance change was large and unexpected. --->A few people here seem to have liked it.--- Well, sure. Thread drift happens, but you misunderstood the point being presented initially and posted a silly and irrelevant argument. --->This thread started with capacitor nonlinearity.--- No, this thread started with unexpectedly large change in capacitance VS voltage, but no mention was made of non-linearity before your initial nonsensical post. BTW, unlike you, James Arthur posted an excellent and, I believe, empirical data set quantifying the change of capacitance with voltage for various dielectrics instead of merely mouthing off which is, of course, your forte. --->Where is your promised high-frequency Variac study?--- On the back burner, but what on earth does that have to do with capacitance change VS voltage??? BYW, are you going to spend the rest of your life whining about that the same way you whine about Jim's killfiling/not killfiling you? --->Can you actually do anything but whine?--- Since, according to you, "Crossing Larkin" = "Whine", the answer is a resounding "yes". -- JF
Reply by ●May 8, 20132013-05-08
John Fields <jfields@austininstruments.com> writes: [...]> > --- > Since, according to you, "Crossing Larkin" = "Whine", the answer is a > resounding "yes".John. FFS. Have you really got nothing better to do than obsessively scan every single word of Larkins posts until you find some creative way to misinterpret it? -- John Devereux
Reply by ●May 8, 20132013-05-08
On May 7, 8:39=A0pm, josephkk <joseph_barr...@sbcglobal.net> wrote:> On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold > > > > > > <gher...@teachspin.com> wrote: > >On May 2, 6:05=A0pm, John Larkin <jlar...@highlandtechnology.com> wrote: > >> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com > >> wrote: > > >> >4.7uF 6.3V X5R > >> >dC =3D -70% @ 6VDC (!!) > >> > =A0http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.=pdf> > >> >James > > >> It's like a tantalum cap rated for X volts, with recommendation to > >> never use it at X volts. > > >> (I actually use tantalum caps at rated voltage *if* there's not much > >> charging current available. Otherwise, X/3 is about right.) > > >> -- > > >> John Larkin =A0 =A0 =A0 =A0 Highland Technology, Inc > > >> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.com > > >> Precision electronic instrumentation > >> Picosecond-resolution Digital Delay and Pulse generators > >> Custom laser drivers and controllers > >> Photonics and fiberoptic TTL data links > >> VME thermocouple, LVDT, synchro =A0 acquisition and simulation > > >I've got this audio amp that runs off 15 volts. > >But I've told people you can stick upto 40V into it. > >(as long as it doesn't over heat.) > >The IC's are good to 60V (I think, LM675?) but I've only got 50V tants > >as bypass C's. =A0I should do a mod to 100V tants. =A0Someone will want > >more V. > > >George H. > > If it were me, i won't use a solid tant at more than 1/2 rated V. > > ?-)- Hide quoted text - > > - Show quoted text -Yeah, that's my normal margin. But someone wanted more voltage drive. (The amp has a plug in the back for DC power.) George H.
Reply by ●May 8, 20132013-05-08
On May 7, 10:03=A0pm, John Larkin <jjlar...@highNOTlandTHIStechnologyPART.com> wrote:> On Tue, 07 May 2013 17:39:04 -0700, josephkk <joseph_barr...@sbcglobal.ne=t>> wrote: > > > > > > >On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold > ><gher...@teachspin.com> wrote: > > >>On May 2, 6:05 pm, John Larkin <jlar...@highlandtechnology.com> wrote: > >>> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com > >>> wrote: > > >>> >4.7uF 6.3V X5R > >>> >dC =3D -70% @ 6VDC (!!) > >>> >http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf > > >>> >James > > >>> It's like a tantalum cap rated for X volts, with recommendation to > >>> never use it at X volts. > > >>> (I actually use tantalum caps at rated voltage *if* there's not much > >>> charging current available. Otherwise, X/3 is about right.) > > >>> -- > > >>> John Larkin Highland Technology, Inc > > >>> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.co=m> > >>> Precision electronic instrumentation > >>> Picosecond-resolution Digital Delay and Pulse generators > >>> Custom laser drivers and controllers > >>> Photonics and fiberoptic TTL data links > >>> VME thermocouple, LVDT, synchro acquisition and simulation > > >>I've got this audio amp that runs off 15 volts. > >>But I've told people you can stick upto 40V into it. > >>(as long as it doesn't over heat.) > >>The IC's are good to 60V (I think, LM675?) but I've only got 50V tants > >>as bypass C's. =A0I should do a mod to 100V tants. =A0Someone will want > >>more V. > > >>George H. > > >If it were me, i won't use a solid tant at more than 1/2 rated V. > > >?-) > > Why are you talking about tantalum caps in a thread about ceramic caps?Sorry my fault.... a bit of thread drift. (It's all about me after all isn't it? :^) George H.> > You intentionally overgeneralized it from MLCC capacitor voltage > coefficient in order to post something, however irrelevant. =A0Raging > Narccissist. > > -- > > John Larkin =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Highland Technology Incwww=.highlandtechnology.com=A0 jlarkin at highlandtechnology dot com> > Precision electronic instrumentation > Picosecond-resolution Digital Delay and Pulse generators > Custom timing and laser controllers > Photonics and fiberoptic TTL data links > VME =A0analog, thermocouple, LVDT, synchro, tachometer > Multichannel arbitrary waveform generators- Hide quoted text - > > - Show quoted text -
Reply by ●May 8, 20132013-05-08
On Wed, 08 May 2013 03:33:16 -0500, John Fields <jfields@austininstruments.com> wrote:>On Tue, 07 May 2013 13:52:45 -0700, John Larkin ><jlarkin@highlandtechnology.com> wrote: > >>On Tue, 07 May 2013 15:26:41 -0500, John Fields >><jfields@austininstruments.com> wrote: >> >>>On Mon, 06 May 2013 22:26:54 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Mon, 06 May 2013 21:05:15 -0700, josephkk <joseph_barrett@sbcglobal.net> >>>>wrote: >>>> >>>>>On Thu, 02 May 2013 17:54:47 -0700, John Larkin >>>>><jlarkin@highlandtechnology.com> wrote: >>>>> >>>>>>On Thu, 02 May 2013 18:29:42 -0500, John Fields >>>>>><jfields@austininstruments.com> wrote: >>>>>> >>>>>>>On Thu, 02 May 2013 15:05:54 -0700, John Larkin >>>>>>><jlarkin@highlandtechnology.com> wrote: >>>>>>> >>>>>>>>On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodboat@yahoo.com >>>>>>>>wrote: >>>>>>>> >>>>>>>>>4.7uF 6.3V X5R >>>>>>>>>dC = -70% @ 6VDC (!!) >>>>>>>>> http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf >>>>>>>>> >>>>>>>>>James >>>>>>>> >>>>>>>>It's like a tantalum cap rated for X volts, with recommendation to >>>>>>>>never use it at X volts. >>>>>>>> >>>>>>>>(I actually use tantalum caps at rated voltage *if* there's not much >>>>>>>>charging current available. Otherwise, X/3 is about right.) >>>>>>> >>>>>>>--- >>>>>>>Actually, I think what's being commented on is the unexpected >>>>>>>tolerance of the capacitance of the cap rather than the cap's >>>>>>>likelihood of failure as a function of charging current/terminal >>>>>>>voltage. >>>>>> >>>>>>What we're talking about is whether you can, in real life situations, >>>>>>actually use an X volt rated cap at X volts. >>>>>> >>>>>No. JL. You intentionally overgeneralized it from MLCC capacitor voltage >>>>>coefficient in order to post something, however irrelevant. Raging >>>>>Narccissist. >>>> >>>>It would be a hell of a discussion group if nobody posted anything. >>> >>>--- >>>And that justifies your posting nonsense just to keep yourself in the >>>limelight? >> >>What's nonsense about using a capacitor's nonlinearity to build a >>parametric frequency divider? > >--- >No one said anything about the _nonlinearity_ of the capacitance >change, the point was being made that the capacitance change was large >and unexpected. >--- > >>A few people here seem to have liked it. > >--- >Well, sure. Thread drift happens, but you misunderstood the point >being presented initially and posted a silly and irrelevant argument. >--- > >>This thread started with capacitor nonlinearity. > >--- >No, this thread started with unexpectedly large change in capacitance >VS voltage, but no mention was made of non-linearity before your >initial nonsensical post. > >BTW, unlike you, James Arthur posted an excellent and, I believe, >empirical data set quantifying the change of capacitance with voltage >for various dielectrics instead of merely mouthing off which is, of >course, your forte. >--- > >>Where is your promised high-frequency Variac study? > >--- >On the back burner, but what on earth does that have to do with >capacitance change VS voltage??? > >BYW, are you going to spend the rest of your life whining about that >the same way you whine about Jim's killfiling/not killfiling you? >--- > >>Can you actually do anything but whine? > >--- >Since, according to you, "Crossing Larkin" = "Whine", the answer is a >resounding "yes".Freaking moron. Non-constant c with change in V *IS* capacitance nonlinearity. It means that Q <> C * V It causes harmonic distortion in filters and coupling circuits. It makes parametric amps and oscillators possible. It will make RC timers nonlinear. You're not crossing me, you're being stupid about electronics. You won't post the Variac data because you wouldn't know what to measure. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
Reply by ●May 8, 20132013-05-08
On Wed, 8 May 2013 04:49:45 -0700 (PDT), George Herold <gherold@teachspin.com> wrote:>On May 7, 10:03�pm, John Larkin ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >> On Tue, 07 May 2013 17:39:04 -0700, josephkk <joseph_barr...@sbcglobal.net> >> wrote: >> >> >> >> >> >> >On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold >> ><gher...@teachspin.com> wrote: >> >> >>On May 2, 6:05 pm, John Larkin <jlar...@highlandtechnology.com> wrote: >> >>> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com >> >>> wrote: >> >> >>> >4.7uF 6.3V X5R >> >>> >dC = -70% @ 6VDC (!!) >> >>> >http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf >> >> >>> >James >> >> >>> It's like a tantalum cap rated for X volts, with recommendation to >> >>> never use it at X volts. >> >> >>> (I actually use tantalum caps at rated voltage *if* there's not much >> >>> charging current available. Otherwise, X/3 is about right.) >> >> >>> -- >> >> >>> John Larkin Highland Technology, Inc >> >> >>> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.com >> >> >>> Precision electronic instrumentation >> >>> Picosecond-resolution Digital Delay and Pulse generators >> >>> Custom laser drivers and controllers >> >>> Photonics and fiberoptic TTL data links >> >>> VME thermocouple, LVDT, synchro acquisition and simulation >> >> >>I've got this audio amp that runs off 15 volts. >> >>But I've told people you can stick upto 40V into it. >> >>(as long as it doesn't over heat.) >> >>The IC's are good to 60V (I think, LM675?) but I've only got 50V tants >> >>as bypass C's. �I should do a mod to 100V tants. �Someone will want >> >>more V. >> >> >>George H. >> >> >If it were me, i won't use a solid tant at more than 1/2 rated V. >> >> >?-) >> >> Why are you talking about tantalum caps in a thread about ceramic caps? > >Sorry my fault.... a bit of thread drift. >(It's all about me after all isn't it? :^) >George did it! -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
Reply by ●May 8, 20132013-05-08
On Wed, 8 May 2013 04:48:04 -0700 (PDT), George Herold <gherold@teachspin.com> wrote:>On May 7, 8:39�pm, josephkk <joseph_barr...@sbcglobal.net> wrote: >> On Thu, 2 May 2013 18:42:09 -0700 (PDT), George Herold >> >> >> >> >> >> <gher...@teachspin.com> wrote: >> >On May 2, 6:05�pm, John Larkin <jlar...@highlandtechnology.com> wrote: >> >> On Thu, 2 May 2013 12:31:43 -0700 (PDT), dagmargoodb...@yahoo.com >> >> wrote: >> >> >> >4.7uF 6.3V X5R >> >> >dC = -70% @ 6VDC (!!) >> >> > �http://psearch.murata.com/capacitor/product/GRM188R60J475ME19%23.pdf >> >> >> >James >> >> >> It's like a tantalum cap rated for X volts, with recommendation to >> >> never use it at X volts. >> >> >> (I actually use tantalum caps at rated voltage *if* there's not much >> >> charging current available. Otherwise, X/3 is about right.) >> >> >> -- >> >> >> John Larkin � � � � Highland Technology, Inc >> >> >> jlarkin at highlandtechnology dot comhttp://www.highlandtechnology.com >> >> >> Precision electronic instrumentation >> >> Picosecond-resolution Digital Delay and Pulse generators >> >> Custom laser drivers and controllers >> >> Photonics and fiberoptic TTL data links >> >> VME thermocouple, LVDT, synchro � acquisition and simulation >> >> >I've got this audio amp that runs off 15 volts. >> >But I've told people you can stick upto 40V into it. >> >(as long as it doesn't over heat.) >> >The IC's are good to 60V (I think, LM675?) but I've only got 50V tants >> >as bypass C's. �I should do a mod to 100V tants. �Someone will want >> >more V. >> >> >George H. >> >> If it were me, i won't use a solid tant at more than 1/2 rated V. >> >> ?-)- Hide quoted text - >> >> - Show quoted text - > >Yeah, that's my normal margin. But someone wanted more voltage >drive. (The amp has a plug in the back for DC power.) > >George H.Tants across power rails are big hazards. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
