Date: Mon, 21 Jan 2002 12:40:26 -0600
Reply-To: Larry Alofs <lalofs@ENTERACT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Larry Alofs <lalofs@ENTERACT.COM>
Subject: Re: AFM Capacitor fix
Content-Type: text/plain; charset=us-ascii
Looks good!
Larry A.
Blake Thornton wrote:
>
> 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
> >
|