[Elecraft] K3 Popping noise in headphones??

[Wes (N7WS)]

I don't use any RXEQ and my pitch is usually between 400 and 450 Hz.  Yes, 
100->150 is "worse", although not particularly objectionable; a curiosity 
actually. But there are other pops too, 750->800 is about the same and there is 
also a dependence upon the shift.

On 10/18/2015 11:16 AM, Joe Subich, W4TV wrote:
>
> On 10/18/2015 11:46 AM, Wes (N7WS) wrote:
>> As a point of reference, my old K3 with the original synthesizer
>> board pops when changing BW. It's most noticeable going from 150 Hz
>> to 100 Hz and vice versa.
>
> There will be a slight pop when changing bandwidth between 150 and 100
> Hz as the K3/K3S disables the RXEQ at bandwidths less than 150 Hz.  The
> level of the "pop" will be related to the amount of EQ in use *around*
> *the center of the passband* (e.g., "pitch").  If for example, pitch is
> 500 Hz and bands 4 (400 Hz) and 5 (800 Hz) are 0, there will be little
> or no "pop".  However, if one has 400/800 Hz set for significant boost
> there will be a fairly loud "pop" as the level changes.
>
> 73,
>
>    ... Joe, W4TV
>