Hey Allison, since all we need are a few DB less harmonics, would a modest number of limited stages diode switched accomplish a useable goal? ?Maybe 10-12 dB improvement on a daughterboard??
You probably solve questions like that in your head in seconds ...
Gordon
On Mar 4, 2019, at 16:42, ajparent1/KB1GMX <kb1gmx@...> wrote:
The frequency range is more than 10:1 from about 1.8mhz to 29.9999 pick an rc value that rounds the edges
at say 3mhz that doesn't kill the signal completely at 14mhz?? Seriously there is a lack of understanding about
RC fitlers.? ?Hint, a value that would have useful effect will also absorb about half the signal, double the frequency
the absorption greatly increases. so many switched RC filters with loss.? So much for the wishful the magic pill.
The only choice is a LC filter as then the band pass or in the case of low pass can be high enough to pass the
signal mostly unmolested and still suppress its harmonics.? Works well save for you need like 5-7 switched
filters to do it.? Since filtering seems to be a bad word, there are few solutions that do not involve a greater
amount of hardware.?
