But if you leave the setting at its nominal, can you hear the difference as
that bandwidth is selected? I'm not sure I understand the advantage you are
gaining by bringing the crystal filter in later; I'll do if there's
something to be gained, it sounds an interesting approach.
David
G3UNA
When the hardware AGC responds under these conditions, I am guessing that the
effect might be an increase in the general background noise heard. This is
really what I was after.
After looking at the clock last night and finishing off my post too quickly,
I got poster's remorse about the
: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Hearing the effect of narrower roofing filter
- Original Message -
From: Jan Erik Holm [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net
Sent: Tuesday, July 08, 2008 8:31 AM
Subject: Re: [Elecraft] Hearing the effect of narrower roofing filter
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
more gradual.
Dick, K6KR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Darwin, Keith
Sent: Tuesday, July 08, 2008 7:43 AM
To: elecraft@mailman.qth.net
Subject: RE: Re: [Elecraft] Hearing the effect of narrower roofing filter
Not sure, David, if your Q
K6KR wrote:
I notice a definite qualitative change as the narrower filters switch in.
It
sounds quieter, and it seems like the volume is being turned down. I think
I'm responding to the reduced low and high frequency components that are
supposed to be cut off. The DSP-related changes seem more
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Darwin, Keith
Sent: Tuesday, July 08, 2008 7:43 AM
To: elecraft@mailman.qth.net
Subject: RE: Re: [Elecraft] Hearing the effect of narrower roofing filter
Not sure, David, if your Q was to me or to Hank. I can
The reason I'm particularly interested is because I fancy doing diversity
reception and de-select my roofing filters in the main rx so there is no
phase shifting relative to the second rx without filters.
Have you de-selected the roofing filters to do a comparison with and
without?
David
But if you leave the setting at its nominal, can you hear the difference as
that bandwidth is selected? I'm not sure I understand the advantage you are
gaining by bringing the crystal filter in later; I'll do if there's
something to be gained, it sounds an interesting approach.
David
G3UNA
Nope, I have not. My operating (near zero right now due to life
getting in the way) is 99.9% CW, old school, with manual keys. I'm not
pushing the envelop so I'm not trying new novel things. These days, I
pretty much just use my rig rather than playing testing with it.
- Keith N1AS -
- K3
Cutter
Sent: Tuesday, July 08, 2008 10:18 AM
To: elecraft@mailman.qth.net
Subject: Re: Re: [Elecraft] Hearing the effect of narrower roofing filter
But if you leave the setting at its nominal, can you hear the difference as
that bandwidth is selected? I'm not sure I understand the advantage you
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