FM Modulator

Last night I worked on the 10.7 MHz FM modulator.
I use a super VXO to make a 10.7 FM modulated signal.
To get more deviation I put a varicap parallel to the existing varicap.
This works, it even brings the center frequency down 2 KHz. That solved another problem as the tx frequency was 2 KHz to high.

While I found another problem. It seems the driver stages osillates. I reduced the gain of this stage. I helps but it must be investigated further.