K1:potential new product

[Benny Aumala]

To have a DSP Noice Reduction and AF-filter
in K1 you might put this Low Power Board inside K1:

http://www.sgcworld.com/ADSPProductPage.html


Benny   oh9nb

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[John Young-11]

I think it would be a hard sell for me.  Going from 55ma to 135ma -
about 145% increase in current drain on receive.  It may be good at
home but looks like it would eat batteries for field use.

If the DSP can be done at a much lower current it would be an interesting idea.

73
John



--
John D Young
WA8KNE
ETC USN retired




On Jan 9, 2008 11:27 PM, Benny Aumala <[hidden email]> wrote:

> To have a DSP Noice Reduction and AF-filter
> in K1 you might put this Low Power Board inside K1:
>
> http://www.sgcworld.com/ADSPProductPage.html
>
>
> Benny   oh9nb
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
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>
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>

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[Richard Davis-5]

John Young wrote:

> I think it would be a hard sell for me.  Going from 55ma to 135ma -
> about 145% increase in current drain on receive.  It may be good at
> home but looks like it would eat batteries for field use.
>
> If the DSP can be done at a much lower current it would be an interesting idea.
>
> 73
> John
>
>
>

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[Kurt Pawlikowski]

Hi,

    Besides the "current" issue, has anyone used this device? My limited
experience with audio DSP's (GAP's "Hear It" inline module) is that they
work reasonably well for moderate to strong signals. But, when you get
into the low signal strength area and high noise, the seem to "cut out"
parts of the signal. Moderate and strong signals are okay.

    Any comments?

    Regards,

    kurtt

    Kurt Pawlikowski, AKA WB9FMC
    The Pinrod Corporation
    [hidden email]
    [phone]
    http://pinrod.com

Benny Aumala wrote:

> To have a DSP Noice Reduction and AF-filter
> in K1 you might put this Low Power Board inside K1:
>
> http://www.sgcworld.com/ADSPProductPage.html
>
>
> Benny   oh9nb
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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[Matt Kastigar]

All:
MANY responses - most like the idea, but do not like the additional current draw.  For a KX1, the current should be nil (if possible!); for the K1 (and K2 and K3), I (me-own-self) am willing to 'take the hit' of a few more mA.  If it is an *option* (like the KDSP2), you can add it - or not - at home, use it with mains power, remove it for field use on batteries.
And, as suggested, an 'outboard' device might be the answer (in the 'mean time').

Just my $.02 (BTW, what is that in EU's?)

Thanks for all the responses... I have a lot more research to do.  

-Matt  W0XEU


>>> "Kurt Pawlikowski" <[hidden email]> 1/10/2008 1:26 AM >>>
Hi,

    Besides the "current" issue, has anyone used this device? My limited
experience with audio DSP's (GAP's "Hear It" inline module) is that they
work reasonably well for moderate to strong signals. But, when you get
into the low signal strength area and high noise, the seem to "cut out"
parts of the signal. Moderate and strong signals are okay.

    Any comments?

    Regards,

    kurtt

    Kurt Pawlikowski, AKA WB9FMC
    The Pinrod Corporation
    [hidden email]
    [phone]
    http://pinrod.com 

Benny Aumala wrote:

> To have a DSP Noice Reduction and AF-filter
> in K1 you might put this Low Power Board inside K1:
>
> http://www.sgcworld.com/ADSPProductPage.html 
>
>
> Benny   oh9nb
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
> Help: http://mailman.qth.net/subscribers.htm 
> Elecraft web page: http://www.elecraft.com 
>

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[Alan Bloom]

I have a W9GR audio DSP kit that I built years ago.  To give you an idea
how long ago, it uses a TI TMS320C10 DSP!  (The invoice is dated
9/16/92.)

Despite that, and despite the fact that it uses only 8-bit digitization,
it works amazingly well.  I found the LMS noise reduction works great on
signals more than a few dB above the noise level.  It is true that weak
signals are not enhanced, but they don't seem to be degraded either.

With only 8 bits of dynamic range it is important to keep the audio
level set as close to full scale as possible.

The unit has several modes, including noise reduction, multi-tone notch,
and bandpass filters of various bandwidths.  It's fun to listen to CW
with the notch filter turned on.  You only hear the first few
milliseconds of each dot or dash before the LMS algorithm locks on.  It
sounds like key clicks.

Al N1AL


On Wed, 2008-01-09 at 23:26, Kurt Pawlikowski wrote:

> Hi,
>
>     Besides the "current" issue, has anyone used this device? My limited
> experience with audio DSP's (GAP's "Hear It" inline module) is that they
> work reasonably well for moderate to strong signals. But, when you get
> into the low signal strength area and high noise, the seem to "cut out"
> parts of the signal. Moderate and strong signals are okay.
>
>     Any comments?
>
>     Regards,
>
>     kurtt
>
>     Kurt Pawlikowski, AKA WB9FMC
>     The Pinrod Corporation
>     [hidden email]
>     [phone]
>     http://pinrod.com

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