[Elecraft] Re: [K3] Loss of Gain below 550Hz filter width - RESOLVED

[David Ferrington, M0XDF]

Looks like this was something I caused many months ago and the data  
table appears to have been wrong (I'm waiting for Lyle to confirm to  
me that’s the right description of the cause).

I removed all the current firmware from the K3 Firmware folder and  
forced the Utility to get it all from the server and then forced it to  
load everything, including the data table. That has fixed it :-)

Once again, Elecraft shows its quality in its responses to its  
customers - even if we do cause them problems now and then :-)
73 de M0XDF, K3 #174
-- 
We can't solve problems by using the same kind of thinking we used  
when we
created them. -Albert Einstein, physicist, Nobel laureate (1879-1955)

On 4 Jun 2008, at 02:23, Lyle Johnson wrote:

> Hello David!
>
>> I don't have a 500Hz filter and I did say it worked at a very early  
>> version of f/w. And yes I'm loading all the files.
>> I'll try disabling various filters tomorrow.
>
> Yes, I just now am getting caught up on the email thread.
>
> Since the roofing filter is not being switched between 500 Hz and  
> 550 Hz, it is not likely the problem.
>
> At 500 Hz, however, a different IF filter scheme occurs in the DSP.  
> Please reload the DSP data table, using the latest from the server.   
> If you are computer savvy and know where the current DTBL file is  
> located n your computer, please delete it first, so we can be sure  
> the correct DTBL file is safely loaded into your K3.  The DTBL  
> changed with release 1.49 of the DSP which is approximately the  
> version of DSP code you started having trouble with (1.48).
>
> If this doesn't correct the problem, you may need to perform an  
> EEINIT.  Wayne may have some suggestions before you do that, however.
>
> 73,
>
> Lyle KK7P