[Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement shipdateinfo; New swap out option on parts order page. CORRECTION

[Steve Ellington]

Paul
This is so confusing. First, a hardware change (2 caps) improves bass then 
along comes a firmware change that does the same thing but only for 
headphones and line out and then a new DSP board that works with the 
firmware to do the same thing but still only for headphones and line out and 
now we're back to the 2 caps that improve headphone, line and speaker audio. 
No wonder there are so many questions. I wish someone would make this more 
clear.
Steve
N4LQ
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "Paul Christensen" <w9ac at arrl.net>
To: <elecraft at mailman.qth.net>
Sent: Saturday, October 10, 2009 7:54 PM
Subject: Re: [Elecraft] [K3] K3 Rev C DSP with Low Freq Enhancement 
shipdateinfo; New swap out option on parts order page. CORRECTION


>> Why was the improvement not applied to all audio outputs, or am I missing
>> something here?
>
> When you go through the schematic and run the response calculations, those
> were the only changes necessary to improve low-end response for all Rx and
> Tx paths.
>
> Take a look at what's happening before the ADC and after the DAC circuits.
> The K3 has some of the best designed audio circuits for a communications
> transceiver.
>
> Paul, W9AC
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html