[Elecraft] K2 SSB Mic Input Frequency response?

[JEAN-FRANCOIS MENARD]

I'm also agree with Fran, at least an explanation from Elecraft about  
this mod would be really appreciated.

Le 05-08-28 à 13:18, Francis Belliveau a écrit :

> I am now confused by the existence of two different mod's with the  
> same
> goal.
>
> It makes perfect sense to me that I should not be wasting Tx energy  
> on audio
> frequencies as low as 20Hz.  Beyond that I am somewhat in the dark.
>
> Jim Brown and Stewart Baker have each suggested a modification to  
> improve
> this situation.
>
> I am at a loss to know which, if either, I should implement.  I  
> must admit
> that I an very tempted to incorporate the indicated improvements.   
> However,
> I would have no means of evaluating the results and therefore look  
> to the
> remainder of those on this list for further opinion.
>
> Summary of the mod's are:
>
> from Jim:
>     Change R14 from 1K to 2K.
>     Change C34 from 2.2hF to 0.22 uF.
>     Add 1uF in parallel with R15
>
> from Stewart:
>     Change C34 from 2.2uF to 0.47uF
>     Change C31 from 2.2uF to 1uF
>     Change C20 from 0.33uF to 0.047uF
>
> Is the situation severe enough to warrant an official mod for this?
> Inquiring minds want to know.
>
> Fran
>
>
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