I found a 13 element 150 Mhz to 174 Mhz adjustable (pinch/stretch the coils?) filter in my junk box, It has seven capacitors marked as below.
10 E---30pf---36pf---40pf---36pf---30pf---10 E All caps are silver mica, labeled 850 volts. I wonder about the values of the first and last capacitor, also why are the special?I have found a calculator for multi element chebychevs, but can't match these values, any clue.
Possible hint: The input/output connectors are RCA phono style. The literature says it's 100 Watt filter.
I assume it's a 50 ohm filter, but here to be corrected.
So, I wonder about the values of the first and last capacitor, also why are they specially marked?
Why can't I match up the cap values with the calculator?
Mikek