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ILER-DDS 0-40MHz VFO/DDS KIT

Written By EA3GCY


VFO DDS ILER QRP KIT HAM RADIO TRANSCEIVER SSB CW EA3GCY VXO TRX QRZ QSL

New version V2.1 Universal VFO for all ILER, MFT, EGV transceivers and similar projects.

ILER-DDS V2.1 VFO SPECIFICATIONS

  • Universal VFO for all ILER, MFT, EGV transceivers and similar projects.
  • S-METER level indicator with S-0 to S-9 and 10-level graphica bar.
  • S-METER voltage input 0 to 5V direct or inverted, with independent adjustment of ach level.
  • Dual VFO, VFO-A and VFO-B
  • RIT / SPLIT function without limit.
  • Configurable Tuning Steps: selected ones or all steps. 10Hz to 10Mhz
  • Programmable IF Offset  IF=RF+VFO, IF=VFO-RF, IF= RF-VFO, IF=0 (RF generator)
  • Programmable  upper and lower band limit.
  • Fine calibration of the frequency reference by software (up to 1Hz accuracy).
  • Voltmeter display with 0.1V accuracy (0.01V calibration).
  • Auxiliary I/O pins for expansioin..
  • 2 x SINEWAVE OUTPUTS.
  • 2 x SQUARE OUTPUTS.
  • LOW SPURIOUS. TX and RX mixers spectrum is equal to or better than a VXO one.
  • DDS AD9850BRS integrated circuit.
  • Reference clock: 125MHz
  • Signal output level at 200 ohms: 300mVpp 35MHz // 800mVpp 20MHz
  • User programmable "Welcom message": callsign or name.
  • LOCK function for push button and encoder.
  • Automatic record of last used frequency or current frequency.
  • 2 Line x 8 character LCD with  AUTO-ON-OFF configurable backlight..
  • Power supply: 9-14V about 100mA.
  • Outboard encoder for a more versatile mechanical configuration.
  • Small size "sandwich" module, easy to fix with srews or glue.

  • Total spaced used: 51 x 36 x 40 mm W-L-H (with soldered LCD 35 mm L). LCD window size 29 x 19 mm.
  • Soft touch non stop rotary encoder (like commercial equipment).
  • 24 steps per revolution encoder (maximun speed 36 steps/s).
  • Simple, direct, and immediate configuration through menus.
  • All settings are stored in EEPROM (1 million write/read cycles (minimum) and 100-year).
  • PIC18F2525-I/SP microcontroller 20MHz clock.
  • Complete kit for an easy construction: all parts, encoder and 3 PCB included (SMD parts already soldered).
To place an order and manuals download go to the new website 

11MHz. scope
DDS output signal 10MHz
DDS output signal 20MHz.