[Elecraft] K3 vs. HPSDR Mercury receiver

[Jim Brown]

On Fri, 7 Nov 2008 13:44:26 -0800 (PST), Julian, G4ILO wrote:

>If crystal filters distort the phase enough to make an audible difference on
>speech how the heck do we ever manage to receive PSK through them?

Phase shift is greatest where amplitude response is changing rapidly -- that 
is, at the skirts. Mostly we decode PSK near the center of the passband. Also, 
PSK is quite narrowband, so the phase shift over the relatively narrow 
bandwidth is generally minimal. 

73,

Jim K9YC