[Elecraft] [K3] K3 Rev C +AF filter

Julian, G4ILO julian.g4ilo at gmail.com
Thu Dec 17 09:22:26 EST 2009




Ian Maude wrote:
> 
> Just to make it clear, I am not unhappy with the way Elecraft do business.
>  Neither am I bothered about buying a small add-on board to improve my
> reception.  I am quite willing to pay for the small board but do not see
> why
> I should have to pay £60-£70 (which it will be here after shipping and VAT
> etc) for a replacement DSP board that I do not need.
> So, is the add on audio filter board available to buy as a separate unit?
> 
> 
I can't find any mention (other than rumour) of an add-on board. But if such
an add-on was designed to fit the new DSP board presumably it would not fit
on to the old board.

The only benefit of the new DSP board as far as I can find out is extended
bass response through the headphone socket. While that would be nice to
have, like you I can't justify the cost (which I would expect to be more
like £80-£90 once you add in the tax collection charge and sending back the
old board.)

I don't see what purpose an audio filter board would serve, given that we
have a crystal filter followed by DSP filtering and then RX equalization
already. Any high frequencies that can get past that lot must be at a pretty
low level already.

-----
Julian, G4ILO. K2 #392  K3 #222.
* G4ILO's Shack - http://www.g4ilo.com
* KComm - http://www.g4ilo.com/kcomm.html
* KTune - http://www.g4ilo.com/ktune.html

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