Schematics

Speaky -
SSB / CW / PSK
SW-Transceiver kit

.Preselector

The 2003/2004 Transceiverproject of German QRP Club DL-QRP-AG

The Team:
Design: Peter, DK1HE
Prototypes and test: DK1HE, Juergen DL1JGS, Peter DL2FI
Coordination and Manual: Peter, DL2FI (FIservice)
Kit-Realisation: Nikolai, DO7FI (Now DL7NIK)

Manual translation: Peter, OZ5DW and Bodo, DL7BJK

• Speaky technical data:
  - From 1 to 5 HF bands switchable from the front of the box.- Modulation: SSB/ CW/ PSK31 etc.
  - Power input: 10W PEP
  -DDS/ PLL- frequency control, with programmable frequency steps.(rotary encoder)
  - choice of RIT or XIT; integrated keyer
  - VFO tuning range 500KHz
  - optional digital frequency readout.
  - automatic bandwith selection ( 2,4KHz/ 600Hz) of the 4pole 8MHz- crystal filter
  - tunable high Q preselector
  - High current RF input circuit with dynamic feed back.
  - +7dBm- Schottky- ring mixer ( TUF- 1)
  - High current J- FET IF amplifier
  - > 90dB IF dynamic range (A244 IC)
  -AGC production with peak to peak rectifier.
  - AF section with power for loudspeaker
  -robust PA with 2 x 2SC1969
  - Transmitter output of 10W PEP
  - switchable harmonics filter
  - integrated speech compressor with a compression of max. 15: 1- modulation distortion with on compressor < 1% !!
  - adjustable transmitter power
  - CW- VOX with adjustable decay
  - 10,8- 15V power supply
  - Stable enclosure with prepunche holes
  - Digital Frequency readout - measuring LO frequency
  - Bargraph S-meter/relative Power Meter