On Tue, 24 Mar 2009 08:28:57 +, David Woolley (E.L) wrote:
>Doing so only acts as a roofing filter. With a good enough sound card
>and good enough algorithms, the terminal program ought to be able to
>eliminate the interference as well as using a narrow filter in the K3 DSP.
I disagree, fo
Jim Brown wrote:
> I understand, and that was my point. Reducing the total bandwidth at the
> input of the sound card from 2.8 kHz to 200 Hz will make a signficant
> improvement in the signal to noise ratio. It won't matter on strong
Doing so only acts as a roofing filter. With a good enough
On Sun, 22 Mar 2009 19:15:39 -0700 (PDT), Bill Strong wrote:
>Plenty of QRN on the low bands especially in the summer. I meant the local
>man-made stuff.
I understand, and that was my point. Reducing the total bandwidth at the
input of the sound card from 2.8 kHz to 200 Hz will make a signficant
Subject: Re: [Elecraft] K3 and PSK31 Data Mode and ESSB
> To: "'Erik N Basilier'" ,
>
> Message-ID:
> Content-Type: text/plain; charset="us-ascii"
>
>
>
>> A better approach is to set the K3 bandwidth very narrow, and
>>
Plenty of QRN on the low bands especially in the summer. I meant the local
man-made stuff.
73 Bill WA5KPE
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On Sun, 22 Mar 2009 16:44:40 -0700 (PDT), Bill Strong wrote:
>I probably live in a quieter radio environment than many hams and
>am able to use a wide waterfall without much problem.
There's no QRN where you live?
73,
Jim K9YC
I am in agreement with all of the above about the narrow filter capabilities
of the K3 which I considered a given when I made my original post. I have
also considered the panadapter solution but that would complicate matters to
a degree. I probably live in a quieter radio environment than many ha
; -Original Message-
> From: elecraft-boun...@mailman.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik N Basilier
> Sent: Sunday, March 22, 2009 5:52 PM
> To: Jim Brown; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K3 and PSK31 Data Mode and ESSB
>
nt: Sunday, March 22, 2009 9:02 AM
Subject: Re: [Elecraft] K3 and PSK31 Data Mode and ESSB
> On Sun, 22 Mar 2009 07:44:31 -0700 (PDT), Bill Strong wrote:
>
>>Once
>>generally known, this ability to operate PSK31 in ESSB with click and
>>transmit across a 3.5 kHz waterfall w
On Sun, 22 Mar 2009 07:44:31 -0700 (PDT), Bill Strong wrote:
>Once
>generally known, this ability to operate PSK31 in ESSB with click and
>transmit across a 3.5 kHz waterfall would I think make the K3 even more
>attractive to data mode operators than it already is.
Yes, but: another HUGE advantag
Dave,
Thank you very much for the prompt response and testing of this for me. Once
generally known, this ability to operate PSK31 in ESSB with click and
transmit across a 3.5 kHz waterfall would I think make the K3 even more
attractive to data mode operators than it already is. It would probably
Bill, testing on PSK31 TX, using USB and ESSB set to 4 KHz, centre freq
at 1500 Hz (normal K3 DSP setting)... I can obtain full power from 300
Hz to 3500 Hz on the waterfall, the power drops off abruptly above 3500
Hz. By moving the centre frequency to 2000 Hz I can transmit up to 3700 Hz.
On Data
I've just checked my K3 and DM780, I have the 6 KHz "AM" filter. The
bandwidth appears to go to 4 KHz on the ESSB menu setting, but in fact
the waterfall in DM780 only shows audio out to 3.5 KHz bandwidth on
receive. I can move the centre frequency of the DSP filter to 2 KHz
(normally it is 1.5 KHz
I presently operate my K2/100 in PSK31 data mode with a 2.8 kHz wide
waterfall on the DM780 Superbrowser. I can click and transmit from about 600
Hz to about 1600 Hz on the Superbrowser waterfall without too much
attenuation of the transmitted signal. I made this determination using a
field strengt
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