[Elecraft] K3 New DSP board installed

[Jan Erik Holm]

How about the TX side. AFAI understand it should do
"things" to TX audio.

/ Jim SM2EKM
---------------------
Wes Stewart wrote:
> Is the spur at 3.9 KHz gone?
> 
> --- On Sat, 1/9/10, Steve Ellington <n4lq at carolina.rr.com> wrote:
> 
> From: Steve Ellington <n4lq at carolina.rr.com>
> Subject: [Elecraft] K3 New DSP board installed
> To: Elecraft at mailman.qth.net
> Date: Saturday, January 9, 2010, 9:41 AM
> 
> The installation of the Rev D DSP board went smoothly. I updated the 
> firmware and all is well.
> 
> The first thing I noticed was how much louder the headphones (Bose 32 ohm) 
> are. I use the FP jack. The difference is huge. Before the upgrade, I ran 
> the CW sidetone at 38. Now it's at 14! I'm not sure about the speaker volume 
> but I don't believe there was much if any change.
> 
> I don't
>  hear any change in the low frequency audio. It had already been 
> improved earlier with one of the FW updates. Headphone impedance can affect 
> this too.  Using MixW, I can see a well defined null in audio level below 50 
> Hz.
> 
> The 3rd harmonic is still present in the low level audio output. This has 
> bugged me from day one on the K3. It's weak but visible on the waterfall. 
> See the photo at
> http://n4lq.webs.com/apps/photos/photo?photoid=65288758 Don't bother telling 
> me it's my sound card or my level is too high. I've already been trough that 
> routine.
> 
> As for audio quality and listener fatigue, time will tell. This radio is 
> such an improvement over my IC-7800 that anything I say is just nit picking.
> 
> Was the upgrade worth the money? I guess it depends on how you feel about 
> money and your K3.
> 
>