[Elecraft] What crystal filters for the K3 are linear phase delay (constant group delay) ?

[Jim Brown]

On 4/23/2014 10:47 PM, Walter Underwood wrote:
> The usual approach is to choose a filter with steep skirts that is wider than you need, so you can use the middle of the passband where the phase response is not so bad. Then do additional filtering in DSP, where you can have good amplitude and phase performance at the cost of delay. Better filters, more delay.
>
> There is no free lunch, it's physics.

Well said.

73, Jim K9YC