[Elecraft] Hearing the effect of narrower roofing filter

[Darwin, Keith]

Not sure, David, if your Q was to me or to Hank.  I can only answer for
me.

When I adjust the filter width knob, I'm most definitely hearing the
combined effect of the DSP bandwidth reduction and the change in roofing
filters.  But, since I can change DSP without changing the roofing
filter (by stepping from 1500 Hz down to 550 Hz) I can get a good feel
for how the DSP filter sounds.  Then, stepping to 500 Hz, I can see the
combined effect of one more DSP step plus the insertion of the 500 Hz
roofing filter.  The observed big change from 550 Hz to 500 Hz is
*mostly* due to the roofing filter.

- Keith N1AS -
- K3 711 -

----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
d.cutter at ntlworld.com

Fine observations when you change the filter setting knob, but what
makes you think you are hearing the effect of the roofing filter and not
the dsp filter?  

David
G3UNA