I concur with Mike's evaluation. 4.48 is much more robust than 4.51 as far as 
CW Decode is concerned.

Some things you may want to try to improve the S/N ratio and thus make the 
decoder more effective.

1)Turn the AGC off and reduce the RF Gain (Be careful here and drop the AF Gain 
or you might get a "crash" in the audio. I have AF LIM set to 26 to protect my 
audio amp.) 
2)Narrow the bandwidth. I often use my 400Hz roofing filter and then use the 
width control all the way down to 100Hz.

Using these methods I was able to copy stations that were not discernible on 
the P3. It is a trick from the old days before product detectors etc. but I 
find it still works.

73s Jim, W4ATK
On May 26, 2012, at 7:07 AM, Mike Harris wrote:

> This could be related to the reported problem with the CWT function 
> previously reported and under investigation.  Firmware 4.48 is OK, 
> firmware 4.51 is not.
> 
> Regards,
> 
> Mike VP8NO
> 
> On 26/05/2012 01:44, John_N1JM wrote:
>> Thanks, Fred. It had seemed to me my previous K3 did better but I could have
>> lucked with the right settings for that. I'm generally not a cw person but
>> thought I would try WPXCW tonight and hopefully the decode would give me a
>> little help but for the most part it didn't. My ears were better :-).
>> 
>> John N1JM
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