Another receiver is a receiver set to strengthen the so-called direct response. It is characterized by much higher sensitivity than previously presented in the ME. His submission requires several new elements:
- Antenna module,
- such as field-effect transistor BF 245,
- a few resistors and capacitors (according to the schema.)
Notes construction and start-up:
- as in most construction kit MK value of the items are not critical and the 10k potentiometer for example, can successfully replace the 20k potentiometer, as is the capacitors,
- in the absence of response (excitation of the system), replace the coil connection Circuit reaction
- tuning depends on the initial setting of the radio frequency variable capacitor - bringing the potentiometer to arouse the receiver (squeal in the headphones) - light "withdrawal" from the excitation and the tuning capacitor to the receiving station.
Details of the construction of coils are shown in the respective photographs. Carcass with a diameter of 31 mm is made from a piece of plastic tube and inserted the installation of a resin socket drilled in the wooden podstace. Wire - o, 5 mm DNE.
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