[Elecraft] [K3] Low audio output after AF output mod

[Don Wilhelm]

Kari,

I would hesitate to install a mod that is specified for a Revision XB or 
Revision A board on a Revision XD board without specific information 
that the mod was also intended for that board.

I would suggest removing the added resistors and ask the folks at 
K3support whether the change has been added to the Revision XD board.

73,
Don W3FPR

Kari Sillanmaki wrote:
> Hello group,
>
> Instructions for the AF output mod specify that:
> "This modification is needed for all K3s shipped approximately 
> before 01/12/09 containing either 
> a Revision "XB" or Revision "A" KIO3 board."
>
> I have a K3 #310 with KIO3A board Revision XD.
> The exact markings on the KIO main board read:
> KIO3A MAIN
> Rev XD
> (c) 2007
> ELECRAFT
>
> The board did not have the 470R resistors installed,
> so I installed them according to the instructions on 
> the Elecraft webpage.
>
> Now after the mod, audio output from the 
> rear-panel speaker-jack is very low. 
> I have to cranck up the AF volume pot up 
> to about 2 o'clock in order to hear anything.
>
> So I'm wondering if this mod really is relevant
> for the KIO I'm having?
> Or perhaps I have missed something?
>
> Any ideas, anyone?
>
>
>