[Elecraft] [K3] Width Control and AF Output Level

[Keith Onishi]

My friend informed me that setting 0 to all section of RX EQ solved the AF output level change issue.
Many thanks to all for your suggestions.

73 de JH3SIF, Keith

> 2015/09/14 18:12、Mike K2MK <k2mk at comcast.net> のメール：
> 
> Hi Keith,
> 
> I think the problem is in the setting for the RXEQ. You do not want to use
> +db boost for CW. As I understand it, RXEQ is disabled at 100Hz and 50Hz
> width. So if he has boosted a particular frequency by 10db then when he
> narrows the bandwidth he will suddenly hear a loss of audio signal of 10db.
> To solve this problem keep the RXEQ set to 0 db for the frequencies of
> interest and use negative db settings for the frequencies of no interest.
> 
> 73,
> Mike K2MK
> 
> 
> Keith Onishi wrote
>> One of my friend K3 users report that AF output level with 100Hz passband
>> width is lower than with 150Hz passband width. He also reported that a
>> noise like “Ptsu” was generated on reducing passband width from 150Hz to
>> 100Hz. He had guessed that these were specific to his K3, but some other
>> K3 users including myself reported the same.
>> Some extreme users who use this narrow passband may have been bothered by
>> this reduced AF output level and noise. If the AF output level change is
>> caused by K3 DSP filter design or program, adding automatic gain
>> compensation feature to keep same AF output level would be highly welcome.
>> 
>> 73 de JH3SIF, Keith
> 
> 
> 
> 
> 
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