[Elecraft] K3 DIY DSP Rev D - please elaborate

[Don Wilhelm]

David,

Yes, that answers it about the DSP board upgrade - there will be a note 
there if there is a hardware change that requires updated firmware to 
realize the upgraded function.  Normally, the firmware is "backwards 
compatible" meaning that the updated firmware will run on K3s without 
the hardware upgrade.
I was really commenting to the gentleman who seemed to be having a 
problem locating documentation about what was included in each firmware 
release (upgrade) - perhaps I misunderstood his question (statement?).

73,
Don W3FPR

David Lankshear wrote:
> By firmware release notes, do you mean the comments associated with the order for the K3DSPUPGD, Don?  If that's a yes, then this should settle matters because it says:
>
> "Improves low freq RX/TX audio response below 300 Hz, and adds a Low Pass Filter (LPF) that rolls off RX audio above 4 kHz."
>
> Thanks for your guidance on this, Don.  A Happy New Year to you and to all on the reflector.
>
> 73  DaveL  G3TJP
>   
>