[R-390] Two caps in parallel

[Scott, Barry (Clyde B)]

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 <wy6k@yahoo.com>
To: R-390@mailman.qth.net <R-390@mailman.qth.net>
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?
>>