[Elecraft] AGC? and loss of tone

[Robert Allbright]

Hi all

K2 5219 just completed, everything working, just 1 missing trimmer  
quickly sent within a week (thankyou Elecraft)

If I press PRE/ATT and AGC together to switch off AGC this works but  
I then don't get any signals (or just very low level) playing with  
the RF and AF controls?? any ideas please. U2 pin 5 set to 3.8 volts  
with R1 as in AGC setup.

Now setting up and playing with dsp, went back to check tx and have  
found that the sidetone has disappeared, strange! when it was ok?

 From a brief look at the sidetone checking procedure on P13, I don't  
get any ac volts on pin 4 of U8, expected  2.5Vrms.

Again any ideas at this early stage very welcome, bit more difficult  
now to signal trace with dsp board now plugged into control board.

Just have a feeling that there is a simple answer? ha ha!

73 Robert G3RCE