Bill, in AM, try tuning 1-2 KHz higher or lower than carrier frequency.
Works
for me (more highs) cuz I have only a 2.8 KHz filter for other-than-cw
modes.
73 Dave W8FGX
Guys,
Just got done assembling my second K3 and this one has a 13 Khz
SNIP
--
View this message in context:
Guys,
Just got done assembling my second K3 and this one has a 13 Khz
filter where #1 had 6 Khz - I like to do shortwave listening - thought
the wider filter would give better fidelity, but DSP only goes
5Khz wide is there a mode for this? I assumed with the 13khz roofer
it would be opened up
Bill,
The 5 kHz width indicated for AM is the *audio* bandwidth, not the IF.
The IF bandwidth must be more than 2 times the audio bandwidth for an AM
signal - so your 12 kHz filter is good.
Remember that the 6 kHz filter must be used for AM transmit.
AFAIK, most broadcast stations limit
To: n4z...@yahoo.com
Cc: elecraft@mailman.qth.net
Sent: Sunday, May 03, 2009 2:01 PM
Subject: Re: [Elecraft] Shortwave filters for K3
Bill,
The 5 kHz width indicated for AM is the *audio* bandwidth, not the IF.
The IF bandwidth must be more than 2 times the audio bandwidth for an AM
signal - so
-
From: Don Wilhelm w3...@embarqmail.com
To: n4z...@yahoo.com
Cc: elecraft@mailman.qth.net
Sent: Sunday, May 03, 2009 2:01 PM
Subject: Re: [Elecraft] Shortwave filters for K3
Bill,
The 5 kHz width indicated for AM is the *audio* bandwidth, not the IF.
The IF bandwidth must be more than
-
From: Don Wilhelm w3...@embarqmail.com
To: Steve Ellington n...@carolina.rr.com
Cc: n4z...@yahoo.com; elecraft@mailman.qth.net
Sent: Sunday, May 03, 2009 3:39 PM
Subject: Re: [Elecraft] Shortwave filters for K3
Steve,
The DSP audio bandwidth *can* be moved out to 5 kHz for AM
Steve,
Please do not be confused. The DSP *is* at the IF frequency, *and it
does* process AM at the full bandwidth for all modes as required.
The AM bandwidth *used to be* displayed as the IF bandwidth, but many
were confused because it was double the bandwidth that could be heard -
so it
on any
other rig.
Steve Ellington
n...@carolina.rr.com
- Original Message -
From: Don Wilhelm w3...@embarqmail.com
To: Steve Ellington n...@carolina.rr.com
Cc: elecraft@mailman.qth.net
Sent: Sunday, May 03, 2009 5:03 PM
Subject: Re: [Elecraft] Shortwave filters for K3
Steve,
Please do
.
73,
... Joe, W4TV
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Sunday, May 03, 2009 5:03 PM
To: Steve Ellington
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Shortwave filters
:01 PM
Subject: Re: [Elecraft] Shortwave filters for K3
Bill,
The 5 kHz width indicated for AM is the *audio* bandwidth, not the IF.
The IF bandwidth must be more than 2 times the audio bandwidth for an AM
signal - so your 12 kHz filter is good.
Remember that the 6 kHz filter must be used
Frank,
13 kHz comes quite close to the 15 kHz DSP IF, so using the 13 kHz
roofing filter for AM transmit exposes the possibility of transmission
at an IF image as well as the desired frequency.
As I recall, that was a wish expressed by someone, but I also recall the
Elecraft designers saying
] Shortwave filters for K3
Frank,
13 kHz comes quite close to the 15 kHz DSP IF, so using the 13 kHz
roofing filter for AM transmit exposes the possibility of
transmission
at an IF image as well as the desired frequency.
As I recall, that was a wish expressed by someone, but I also
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