[Elecraft] K3 Narrow CW Filter

[John Huffman]

Thanks to all for the replies.  Stewart identified the problem.  It was 
self-inflicted.

I had set the RX EQ to optimize the CW shift frequency and retard all 
other frequencies.  Undoing that solved the problem.  Thanks!!

As for DSP and narrow CW bandwidths, it is the "smart squelch" that I am 
trying to achieve.  I know most Orion owners complain about the NR, but 
for me the NR in the current Orion firmware does exactly what I wanted.  
The best NR I have ever heard (my opinion) was my Omni 6+.  The NR 
removed the background noise AND peaked the CW signal.  Signals jumped 
out of the noise.

73 de K1ESE
John

GW0ETF wrote:
> John Huffman-3 wrote:
>   
>> I'm getting used to my new K3, but have a question. 
>>
>> My K3 has the 400hz 8-pole filter and the latest firmware.  I've noticed 
>> that the difference between running the DSP filter at 100hz and 150hz is 
>> greatly increased volume at 150hz.  With the NR on (F2-4) easy listening 
>> at 100hz will bow your ears out at 150hz.  Is this just me?  I run AF 
>> gain at 9 o'clock and RF gain at 12 o'clock.
>>
>>
>>     
>
> John,
>
> I had the following from Vic K2VCO in response to a post by me about Noise
> Reduction and RX Equalisation settings - I had it boosted at the cw sidetone
> frequency to give an accentuated effect with NR but found my audio dropped
> when I reduced the b/w beyond the 150 Hz point. So you may want to
> check/play with your RX Eq settings....
>
> ""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.
>