Topband: BC filter follow-up

[Rick Karlquist]

Jim Brown wrote:
>
> Attenuation at the top of the band (near cutoff) is the toughest to
> achieve, the Clifton filter looks awfully good, and the cost is quite
> reasonable. If I had your problem, that would be my choice.
>
> 73, Jim K9YC

The Clifton filter is a Chebyshev, with only 14 dB attenuation
at 1.7 MHz.  What you really want is an elliptic function filter,
of which there are several available.  These can provide much
more attenuation at 1.7 MHz.

Rick N6RK