[Elecraft] K3 NR (was making K3 RX audio like K2)

[GW0ETF]

OK I've just checked this out and Vic is entirely correct.....boosting the cw
tone frequencies certainly does cause a drop in signal when the dsp
bandwidth crosses from 150 to 100Hz, NR or no NR. (and conversely cutting
those frequencies leads to a sudden increase in signal at the crossing point
- it's quite dramatic)

Glad I found this out before cqww but a little bemused as to why this
'feature' hasn't been better circulated; I've been using my K3 for a year
now and have never seen mention of this. Thanks for the heads up Vic (I
think that's the term...!)

Stewart, GW0ETF 


Vic K2VCO wrote:
> 
> GW0ETF wrote:
> 
>> I find RX EQ settings have a significant effect on NR; I have boosted the
>> 400-800Hz channels a few dB and that causes the cw note to appear to
>> 'jump
>> out at you' under NR along with reduction in the noise. Can't remember NR
>> settings but it's not extreme and I aim for least echoing and character
>> softening...
> 
> This is not the best approach because of the following: when the 50 and 
> 100 Hz DSP filters are enabled the RX EQ is disabled (I forgot the 
> reason for this, but Lyle explained it to me). So the effect of 
> narrowing the bandwidth is that the signal suddenly drops several dB!
> 
> If you want to use the RX EQ for this the best way to do it is to leave 
> the desired bands at 0 dB and *reduce* all others by the amount of 
> 'boost' that you prefer.
> -- 
> 73,
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco
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