To radio sounded good on the UHF band, it should be adjusted to exactly take the radio. Will help you with this indicator fine adjustment circuit of which offers Bulgarian journal “Radio Television Electronics”.
The DC component of the FM demodulator is supplied to the comparison circuit (comparator), is performed on four low-power silicon transistors! for example, KT315, KT361, and two LEDs АЛ102А—АЛ102В (see figure).
With the engine variable resistor R5 on the right shoulder of the comparator serves a reference voltage from a stabilized power supply.
Recommend to read
ADJUSTABLE PLIERS
the Owners of the most different techniques faced with a secret or castellated nuts. You can make a master key from an ordinary pair of pliers. For this purpose, the ends of the handles...
HOT PENCIL
Small red-hot spiral, fed by electric current, in skilled hands becomes a kind of pencil, which is burned on the tree. This elektrovyzhigatel. For its production you will need a...
