[Elecraft] [K3] LPF DSP modification

[Joe Planisky]

Elecraft explains it pretty clearly at

http://www.elecraft.com/K3/mods/dsp_rev_c_information.htm

The original post was from someone who was going to do the board swap,  
but decided to go with the user installed LPF option instead.  I  
pointed out (or intended to) that the K3DSPUPGD (the board swap)  
included the improved low frequency response modifications, whereas  
the K3DSPLPF (the user installed LPF board) did not.

I guess what I should have said was that installing the K3DSPLPF  
option did not change the low frequency response.

My (intended) point was that if they didn't already have the improved  
low frequency response and wanted it, they should stick with the board  
swap.  If they didn't care about the improved low frequency response  
or already had it, then installing the LPF board themselves was a  
reasonable alternative to waiting for the board swap.

I did not intend to imply (and I have no knowledge of) any further low  
frequency response circuit changes since rev C.   I do not work for  
Elecraft.  I have no inside information.  All I know about their  
products comes from information that's publicly available on their web  
site.

73
--
Joe KB8AP

On Mar 8, 2010, at 11:56 AM, Grant Youngman wrote:

> Let me be specific in my question.  If I add the LPF daughter board  
> to the "C" level DSP board, are there ADDITIONAL changes that were  
> made to get to the factory "D" level board or not, beyond what is  
> already in the "C" board?  Maybe Elecraft would chime in on this  
> just for clarification.
>
> Thanks ... Grant/NQ5T