From FB group Building Transistor Radios 2018-11-19
Garry Heard
I’ve found that a problem with using electrolytic capacitors to filter
out the RF noise is their internal ESR, effective series resistance.
They don’t filter out the RFI as good as they should. I found that
MLCCs do a better job, if I used some multi microfarad MLCCs. I got
some ‘106’ or 10 uF, 10V MLCCs which have a very low ESR. They’re better
than ‘lytics. You can also use tantalums, but they’re somewhat more
expensive. Also some RF chokes that are high current and low
resistance.
