[AMRadio] old round aluminum filter Capacitors

John E. Coleman (ARS WA5BXO) wa5bxo2006 at pctechref.com
Wed Nov 1 10:17:39 EST 2006

What was in these things?  The inside of the can is lined with a perforated
brittle screen perhaps some carbon stuff. The center post is connected to a
foil which is wound in a spiral.  I don't think it is laminated foil?  The
other capacitor was the same except the foil same material as before was
laid in the can like an accordion. 

I don't get it.

I guess I have never actually examined these darn things before but I did
this time because I wanted to replace the insides of the cans with modern
electrolytic capacitors thereby hiding the modification.

Still learning
John, WA5BXO


More information about the AMRadio mailing list

This page last updated 19 Jan 2018.