[Elecraft] Hardware mods before update to 3.24 Beta?

[Luis V. Romero]

Thanks, Lyle:

I barely hear the noise on 6 and I want to try the DSP enhancement, so I
will upload the firmware in a few and give it a go.  Good time  for testing
DSP here in Florida tonight with thunderstorms all around.  But I will
eventually install the mod just to keep the system up to latest hardware rev
levels.

With two weeks of operational experience now under my belt, I will agree
with some other observations that the existing DSP is very "peaky".  Reports
I see are that this change makes it less peaky.  Also, the level drop was
very annoying.

That said, I'm still on the left edge of the learning curve with 3192.

-lu-  

-----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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