ANTENTOP- 01- 2012, # 016

Autodyne Synchronous Regenerative Receiver

Sergey Starchak

The receiver was made on the base of the regenerative receiver from the Reference 1. Receiver from Reference 1 was made for HF- Band 11.7- 12.1- MHz and at the receiver was used autodyne synchronous reception. Figure 1 shows schematic Autodyne Synchronous Regenerative Receiver from Reference 1.

After hours of the experimental work the schematic was changed. Figure 2 shows improved variant of the autodyne regenerative receiver. The receiver works at 5.9- 12.1- MHz.

Some notes on the Receiver.

Coil L1 that is used as antenna may be made from a coaxial cable in diameter 4- 8 mm

Capacitance of the cable between L1 and VT2 is 47- pF. It was used a length of an usual audio cable from a microphone wire.

Three capacitors C3, C5 and C8 connected to bridge allow eliminate stray generation of the VT2.

VT1 is emitter follower. Receiver may work without this one.

Variable Resistor R3 is used for changing spectral components in the sound. It used at reception SSB/CW.

Audio amplifier should have small amplification because the regenerative receiver provides big enough audio output.

Figure 1 Autodyne Synchronous Regenerative Receiver

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