Lrl from Italy

[Rubin]

Hello Franco
You write:
We cannot use an oscilloscope for measurements in the sensor stage and for the adjustment need only one voltmeter is required to connect to the output of the filter R16, C18 without the use of the oscillator.
If we have 2-4volts DC output, this means that the sensor stage is working properly without oscillations.
But .... we can have oscillation, because a voltmeter can not show it and let us have an output in the range 2-4v DC
My question.
Can we use the oscilloscope to properly adjust the trimmer on the TR3 emitter or is it practically setting in the field?
Please explain more
Thank you