ANTENTOP- 01- 2011 # 015

Regenerative HF- Receiver of the Beginner Radio Amateur

Figure 3 Mounting Plates of the Receiver

B: Front Panel

It is used pluggable inductors at the receiver. The inductors are mounted on the lamp base from the old octal tubes. On the receivers plate is mounted a socket. The needed inductor is inserted to the socket. Table 1 shows data for the inductors.

To feed the receiver it possible to use any power supply that can provide 250-V DC (with current more the 15- mA) for plate and 6.3-V AC (with current near the 2.0- A) for the heater.

Power supply could be made according to schematic from the Figure 4.

Transformer has cross-section 16x 20. Winding I has 1390 (for 127- V, main) +1000 (overall for 220- V, main) turns of the wire in 0.3- mm diameter (29- AWG).

Winding II has 3400 turns (250- V, plate) of the wire in 0.1- mm diameter (38- AWG). Winding III has 74 turns (6.3- V, heater) of the wire in 0.8- mm diameter (20- AWG).

The receiver works straight away when it mounted in the right way and the good part are used. It needs only to tune the inductors to the amateurs' bands. If inductor (L1) is not provide the right bands add turns to part 1-2 (if the receiving frequencies are higher) or remove turns (if the receiving frequencies are lower) from part 1-2. Then it needs to get soft turning on the regeneration. It provides the right numbers of the turns in part 2- 3 of the L1.

www.antentop.org

Page- 81