[Boatanchors] Theory Question bypass caps

Dennis DuVall duvallddennis at gmail.com
Wed Jul 29 18:13:13 EDT 2015


Generally mica or ceramic types would be used for the smaller (RF bypass) cap.

Dennis D.  W7QHO
Glendale, CA

> On Jul 29, 2015, at 2:12 PM, Keith Densmore <ve3gem at gmail.com> wrote:
> 
> Thanks to all who responded to my question. Short answer, bigger cap bigger 
> inductance, not so good at higher frequencies therefore a second small cap to 
> bypass the high end.
> 
> 73, 
> Keith
> 
>> Have a question I know someone will know the answer to.
>> Very often in tube bypass capacitors, both b+ and cathode, two caps are used, 
> a
>> lower value and a higher value, ie .01 and a .001.
>> What is the purpose of this, would not the .01 do the job alone? Never seen
>> this addressed.
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