[R-390] Two caps in parallel

Fri, 29 Mar 2002 14:23:45 -0600

Make that a single 1.001mfd cap.  Sorry.

Barry

Ok, so let's say I put a 1mfd cap and a 1000pfd cap in parallel and plot frequency vs. reactance.  Will the plot look differently than a single 1.0001mfd cap (if one existed)?  From the responses, I assume the plot will be different.

Barry(III) - N4BUQ

Yes, this is correct. A common scheme in high quality audio amplifiers so
the  power supply doesn't "sing along" with the audio circuitry Always bear
in mind that capacitors are "frequency sensitive" devices.
Chuck N1LNH
-----Original Message-----
From: WYsixK <[email protected]>
To: [email protected] <[email protected]>
Date: Friday, March 29, 2002 2:10 PM
Subject: [R-390] Two caps in parallel

>The high value caps don't look very capacitive at high frequency so you
>need a lower value one that does look capacitive at the higher
>frequencies.  This is why it is common to see .01 disc ceramics in
>parallel with large electrolytics.  If caps were perfect you wouldn't
>need the smaller one.
>
>> > Are you suggesting the two caps act independently?
>>
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