[Elecraft] 3.24 Beta FW DSP comment

[Luis V. Romero]

Lyle:

Just installed the two hardware mods and the 3.24 Beta Firmware.  I was most
interested in the DSP system modifications.

The DSP parameters are now really good for SSB.  No more raspy peakyness
like before, very smooth and very effective, especially on 40 and 80 loaded
with QRN that we have here in Florida in the summer, and much less level
drop than before (but there is still some there).

Although I can understand the reticence of the CW guys who like the peaking
action of the previous DSP parameters, its very effective as it is for SSB
and not so bad for CW.

I really like it, much improved from the previous parameters.

With careful adjustment of RF gain, this combination seems like it will be a
winner in the low band battleground.  

Lu Romero - W4LT
K3 #3192 

-----Original Message-----
From: Lyle Johnson [mailto:kk7p at wavecable.com] 
Sent: Friday, August 21, 2009 8:08 PM
To: lromero at ij.net
Cc: Elecraft at mailman.qth.net
Subject: Re: [Elecraft] Hardware mods before update to 3.24 Beta?

> Am I correct in assuming that I *MUST* perform at least the Tuning 
> Noise Reduction hardware mod before installing 3.24 Beta and checking 
> out the new DSP NR "enhancements"?

No.

> The Automatic Front End Protection mod release notes say that the 
> firmware checks for the mod and ignores the change if the mod is not 
> there, but the Tuning Noise mod states that "erratic behavior" of the 
> rig can be expected if you install the new firmware WITHOUT adding the 
> two diodes and two resistors.

Erratic behavior *if* you go to CONFIG:VCO MD and tap "7" until you see SPI
2.

If you leave it at SPI 1, nothing has changed and it will not be erratic
(but will not have reduced noise, either).

73,

Lyle KK7P



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