Date: Mon, 21 Jan 2002 11:16:26 -0700
Reply-To: Blake Thornton <thornton@MATH.UTAH.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Blake Thornton <thornton@MATH.UTAH.EDU>
Subject: Re: AFM Capacitor fix
In-Reply-To: <3C4C5677.CD797A92@enteract.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII
I guess this is something i forgot from my physics/electronics class. So,
capacitance adds when put in parallel.
have I drawn it right:
http://sierra.westminstercollege.edu/test/diag.jpg
thanks,blake
On Mon, 21 Jan 2002, Larry Alofs wrote:
> I used the 10 MFD tantalums by connecting two in parallel. (Connect the
> 2 + leads together and the 2 - leads together). If your putting it
> inside the AFM, I'm not sure about the amount of room. I put mine in
> the connector that hooks onto the AFM by stripping the insulation back a
> little on the proper two wires and soldering. The caps fit under the
> rubber boot OK.
>
> Higher voltage rating is good, if the package doesn't get too big
> physically; gives an extra safety margin and perhaps longer life.
> 16 V is OK since its a tantalum, but given a choice I'd go with 25 V.
> Stick with tantalum; best in a hostile environment, low leakage.
>
> Larry A.
>
>
> Blake Thornton wrote:
> >
> > After looking at harald_nancy page:
> > http://www.geocities.com/harald_nancy/intermitt._syndrome.htm
> >
> > i went to Radio shack to buy a capacitor. I was looking for a 16 volt, 22
> > micro farad tantalum capacitor. Well, I couldn't find one. Here is what
> > is in the radio shack catalog (pg 270 if you have one):
> >
> > Tantalum Capacitors:
> > 10 microF, 16 WVDC (I assume WVDC means volts) <--- is this the one?
> > 1 microF, 35 WVDC
> >
> > Hi-Q ceramic discs:
> > 4.7 pF 50 WVDC
> > 47 pF 50
> > 100 pF 50
> > 220 pF 50
> > 470 pF 50
> > .047 microF 50
> > .1 microF 50
> > .001 microF 500
> > .0047 microF 500
> > .01 microF 500
> > .01 microF 2000
> >
> > Metal film:
> > microF WVDC
> > .01 50
> > .022 50
> > .047 50
> > .1 50
> > .22 50
> > .01 400
> > .1 250
> > 1 250
> >
> > Axial-Lead electrolytic
> > microF WVDC
> > 4.7 35
> > 10 35
> > 22 35 <----- is this the one, too many volts?
> > 47 35
> > 100 35
> > 100 35
> > 220 35
> > 470 35
> > 1000 35
> > 2200 35
> > 4700 35
> > 1000 50
> > 2000 50
> >
> > Radial-Lead electrolytic
> > microF WVDC
> > 220 16 <---- is this the one? to many farads?
> > 470 16
> > 1000 16
> > 4.7 35
> > 22 35 <---- how about this one?
> > 47 35
> > 100 35
> > 220 35
> > 470 35
> > 1000 35
> > 100 50
> >
> > So, do I need to go somewhere else, or is the one I need here?
> >
> > blake
>
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