[Elecraft] KSB2

[Evert Bakker]

Hello guys,

I installed the KSB2 option this afternoon and found out that I did'nt 
have any modulation.
The RX part seems to work although I did not test it completely.
In TX there is no modulation. I checked the microphone (MH2) which 
looked OK (except that the screw to lock the inner connector part with 
the metal shell was missing).
I started to go for the troubleshooting list. Checked the components 
once more, which seems to be placed correctly.
When measuring voltages from the chart, I found a significant difference 
at U1-16 (=U2-8) which is 0V instead of 6.0V in RX mode.
I don't have any idea what to do with this. I checked for a short 
circuit but it looks like that's not the case.

What to do? any suggestion is welcome.

Evert, PA2KW (K2 #4836)