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
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ank Ross W4NHJ
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] 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
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 t
Don,
I thought I read some where that you can use the 13 kHz filter to transmit
AM by using the transmit DSP to limit modulation bandwidth.
Frank
- Original Message -
From: "Don Wilhelm"
To:
Cc:
Sent: Sunday, May 03, 2009 2:01 PM
Subject: Re: [Elecraft] Shortwave filt
:03 PM
> To: Steve Ellington
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Shortwave filters for K3
>
>
> 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.
>
> Th
nfusion on any
other rig.
Steve Ellington
n...@carolina.rr.com
- Original Message -
From: "Don Wilhelm"
To: "Steve Ellington"
Cc:
Sent: Sunday, May 03, 2009 5:03 PM
Subject: Re: [Elecraft] Shortwave filters for K3
> Steve,
>
> Please do not be confused. Th
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 was
riginal Message -
From: "Don Wilhelm"
To: "Steve Ellington"
Cc: ;
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 - that is true,
> and it does not
ve Ellington
> n...@carolina.rr.com
> - Original Message -
> From: "Don Wilhelm"
> To:
> Cc:
> Sent: Sunday, May 03, 2009 2:01 PM
> Subject: Re: [Elecraft] Shortwave filters for K3
>
>
>
>> Bill,
>>
>> The 5 kHz width indicated
;
To:
Cc:
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 your 12 kHz
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 thei
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 t
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