[NJARC] Capacitors

[Eugene Hertz]

yes, good question. I recently read an article in nuts and volts that said one must know the difference between applications of mica, polyester, electrolytic, ceramics and other types of capacitors. Does anyone know a good resource (on the web or elsewhere) that succinctly explains when to use what type of capacitor?n  I always here about orange drops, ceramics, etc., etc.,

thanks
Eugene


>-----Original Message-----
>From: StephenTetorka at cs.com [mailto:StephenTetorka at cs.com]
>Sent: Friday, December 17, 2004 09:19 AM
>To: njarc at mailman.qth.net
>Subject: [NJARC] Capacitors
>
>Win a new Icom IC-756PROIII and help QSL/QTH.net 
>Details at: http://mailman.qth.net/index.html 
>_______________________________________________ 
>Hi Guys: 
> 
>I'm in the process of bringing my circa 1937-39 National NC 81X back to life. 
>They did a really smart job painting the chassis...it looks like new with none of the usual pitting etc to be seen. 
> 
>The bugger has a cast metal oscillator coil tray? - about the size of cigar box under the chassis - that slides the whole width on two 1/2" round tracks...powered by a small chain from the panel control. 
> 
>One capacitor lead is undone. 
>Might as well change the group. 
> 
>My fundamental question is: given a value of say, 0.1 mfd @ 200v...why can't I use any TYPE of capacitor of this value?..even an electrolytic 
>( if I knew my + from my - ). 
> 
>Why isn't a rose a rose? 
> 
>PS: need an output xmfr for the 25L6..2,000 ohms primary...4 watts. 
> 
>And those guys put around 200vdc between their ears with the headphones! 
>I may attempt that tonight with mine since I don't have the speaker. 
> 
>Thanks, 
>Steve 
> 
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