QRP EDEN 20

Here is the backside of my MF. Now the Mic amplifier is there. Gain 13 - 33 dB. Current consumption 4.7 mA. Frequency response 3dB is 300Hz to 40 kHz. There is a filter between Mic amplifier and modulator. When i apply this it start oscillate at 1MHz but i solved it yesterday with 10 nF at gain potentiometer !
Next tonight i try to build the modulator SA612, and to finished i must desire MF frequency.

Murfe  has taken my oscilloscope, it is completely dark. So i leave the LF for now.