Velleman K4601, Иллюстрированное руководство по сборке

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The modulation of the video signal can be further adjusted using trimmer potentiometer RV2.
NOTE: The above instructions for setting the received picture are only guidelines. A little
experimentation with the setting of the frequency capacitor, CV1, and also variations in inductor L2
and potentiometer RV2 can greatly improve the picture quality.
Setting the sound:
Once a good picture has been obtained the sound carrier can be set.
Carefully turn the core of L4 with a suitable screwdriver, until the background noise is suppressed and a
normal sound can be heard.
The audio modulation can be further adjusted using RV1 (with overmodulation distortion becomes
audible).
The modulator is now ready for use
Test and setup