http://elecraft.85.s1.nabble.com/K3-Future-Factory-Hardware-Updates-tp3510666p3515824.html
muffling the station. But when employing the feature with weaker
stations it seems to do a bit better job. I'm not so sure I'd try it
on the really weak ones. But cranking things down to about 1.6Khz
does a good job of cleaning up some noise... But it sure seems to
it has its places where you're better off without it. I'm still very
one that never sleeps.. ;)
> I've not had a chance to spend a lot of time with the new firmware but
> here are my initial impressions.
>
> The NR seems to be really great in CW (but I liked it a lot in 3.25 as
> well). It seems to fade into the new settings a bit quicker and not
> need to be turned off and back on again. Although I find myself being
> impatient and still doing that at times. I did however go up and try
> it out on some SSB stuff and it seems to really round out and muffle
> some of the SSB stuff. I found the signals easier to copy with the NR
> off than on. However the NR in CW is quite impressive at pulling out
> some of the weak ones. Its not doing such a good job that I'd not be
> able to make copy with out it but for me who is a bit green on copying
> its nice to be able to take many signals and make them sound near
> perfect.
>
> One detriment is that when setting the radio to PB CTRL = 0.1 before
> it seemed like there was a lot more low frequency response and that
> the bottom two bands in the EQ finally did something for a change. Is
> there something that one can do to get that audio back?
>
> Testing the auto notch in a labratory type environment I inject an S9
> signal and then notch it I get 43dB of attenuation. Inject a 1uV
> signal and I get 10dB of attenuation. Both make the signal generator
> sound as if its been turned off.
>
> ~Brett
>
> On Tue, Aug 25, 2009 at 10:52 AM, Eric Swartz - WA6HHQ,
> Elecraft<
[hidden email]> wrote:
>> Hi Roy,
>>
>> As of today, we have made the following enhancements to all K3s leaving
>> the factory:
>>
>> K3 VFO TUNING NOISE REDUCTION (requires f/w 3.25 or later)
>> K3 AUTOMATIC FRONT END PROTECTION (1 wire mod)
>> K3 IF OUTPUT BUFFER GAIN MOD (For the P3, LP-PAN etc) (1 resistor value
>> change)
>>
>> Based on feedback form those that have tried the preliminary release of
>> these changes, we are comfortable with adding them as standard K3 features.
>>
>> Please note that the last item, the IF Output Buffer Gain mMod, is
>> slightly different than the similar N8LP mod some have been performing
>> on their K3s independently. We determined that only one value needs to
>> change to implement the gain increase for the IF output. We are changing
>> R8 from 1K ohms to 13K ohms. (Those that have made the N8LP mod may
>> also leave it as is.)
>>
>> Also, we are releasing new beta f/w today, MCU 3.27/DSP 2.24. This is
>> already available on the web page at:
>>
>>
http://www.elecraft.com/K3/k3_software.htm>>
>> This release includes:
>>
>> *ADDITIONAL NOISE REDUCTION (NR) IMPROVEMENTS.
>> *AUTONOTCH depth improved.
>> *SHIFT=.01 FIXED WITH LOW SIDETONE PITCH (300 Hz).
>> *VFOs NOW TUNE DOWN TO 490 kHz.
>>
>> We never sleep in Aptos! :-)
>>
>> 73, Eric WA6HHQ
>>
>> Roy Morris wrote:
>>> I would like to know if is the intention of Elecraft to incorporate the K3 AUTOMATIC FRONT-END PROTECTION mod and the K3VFO TUNING NOISE REDUCTION mod in future PC boards. If so, I plan to install these mods in my K3s. Roy Morris W4WFB
>>>
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