Yaesu FRG-7700

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Yaesu FRG-7700

The Yaesu FRG-7700 is an HF receiver for the radio amateur and for the commercial market. It is a metal cased receiver with a polymer front and it is suitable for reception in the AM, FM, CW and SSB modes. Its frequency coverage is from 150 kHz – 30.0 MHz continuously in 30 switchable bandsegments. Its frequency readout is available in a traditional analog (dish) mode as well as in a digital display mode.

Called a “budget receiver”, the FRG-7700 was released in 1978 as successor to the FRG-7000 by the Japanese Yaesu Musen Corporation and priced at approximately USD$450. This type was in production until 1982.[1]

Technical description[edit]

The FRG-7700 is a superheterodyne type receiver going up to 48 MHz in the Intermediate Frequency trap, followed by a fully synthesized local oscillators in the 1st and 2nd mixer unit and thus creating a very stable VFO.

Accessories[edit]

  • DC-7700 is a connecting device to use 12V DC power
  • FF-5 is a lowpass filter to block AM noise interference in the CW/SSB modes
  • FRA-7700 an HF active antenna for proper indoor reception without external antennas
  • FRT-7700 is an HF antenna tuner for proper tuning of external antennas
  • FRV-7700 is a converter for receiving each 3 bands of VHF signals and making them audible in the HF bands. There used to be 6 different types available able to receive
    • 118-130, 130-140, 140-150 MHz;
    • 50-59, 118-130, 140-150 MHz;
    • 140-150, 150-160, 160-170 MHz;
    • 70-80, 118-130, 140-150 MHz;
    • 118-130, 140-150, 150-160 MHz and
    • 118-130, 150-160, 160-170 MHz
  • MU-7700 is an external memory unit for 12 fixed channels which may be installed at the back of the housing

Tech Specs[edit]

  • Frequency range: 150 kHz – 30.0 MHz
  • Sensitivity:
    • 0.15 – 0.3 MHz: 30 microV/500 Ohm AM; 3 microV/500 Ohm SSB/CW
    • 0.3 – 2 MHz: 25 microV/500 Ohm AM; 2 microV/500 Ohm SSB/CW
    • 2 – 30.0 MHz: 5 microV/50 Ohm AM; 0.5 microV/50 Ohm SSB/CW; 1 microV/50 Ohm FM
  • Selectivity:
    • 6 kHz - 6dB 15 kHz - 50dB AM medium; 2.7 kHz – 6dB 8 kHz – 50dB SSB/CW; 15 kHz – 6dB 30 kHz -40dB FM
  • Stability: less than 2 kHz from 0-30min after starting up; thereafter less than 1 kHz
  • Antenna: 0.15 – 2 MHz 500 Ohm unbalanced; 2 – 30.0 MHz 50 Ohm unbalanced
  • Audio Output: 1.5 W for 8 Ohm @ 10% THD
  • Power Requirements: (AC) / 100 - 240V
  • Dimensions: 33.5 x 13 x 22.5 cm
  • Weight: 6 kg without memo unit and internal battery

References[edit]

  1. ^ Jerome S. Berg (October 2008). Listening on the short waves, 1945 to today. McFarland. pp. 299–. ISBN 978-0-7864-3996-6. Retrieved 9 December 2011. 

External links[edit]