Total posts : 45366
I’d say PhilB makes a good point, the harmonics from a 100 mW signal are likely less than smothering 😆
However, one on my nextdoor neighbors did chew me out last year for splattering all over CB channel 4, so I guess it can come up. I was using an old chopper XMTR at that time, and those do send out the hash.
I switched to a PLL and CB channel 4 is safe now (whee!), but if a person was still interested in filters, the old MWA site has some study plans here: