• Year
  • 1981–1984 ?
  • Category
  • Amateur-Receiver (amateur bands, may include broadcast bands)
  • Radiomuseum.org ID
  • 73751

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Transistors
  • 123
  • Semiconductors
  • Main principle
  • Superhet, double/triple conversion; ZF/IF 48055/455 kHz
  • Wave bands
  • Wave Bands given in the notes.
  • Power type and voltage
  • Alternating Current supply (AC) / 100; 120; 220; 240 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8.5 cm = 3.3 inch
  • Power out
  • 1.5 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: FRG-7700 - Yaesu-Musen Co. Ltd.; Tokyo
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 13 x 5 x 10 inch / 330 x 127 x 254 mm
  • Notes
  • Yaesu Communications Receiver FRG-7700.
    Coverage 150-30000 kHz in AM, SSB, CW and FM; noise blanker, digital frequency-readout. Option for internal 12 channel or 72 channel (6 banks of 12 channels) memory.
    Accessory: Active antenna FRA-7700, antenna tuner FRT-7700, VHF-converter FRV-7700.

  • Net weight (2.2 lb = 1 kg)
  • 6 kg / 13 lb 3.5 oz (13.216 lb)
  • Price in first year of sale
  • 1,478.00 DM
  • Mentioned in
  • RICOFUNK-Katalog 1983
  • Author
  • Model page created by Martin Bösch. See "Data change" for further contributors.

 Collections | Museums | Literature


Forum contributions about this model: Yaesu-Musen Co. Ltd.: FRG-7700

Threads: 2 | Posts: 3

While watching the evening news on TV this past spring, I realized the distinct smell of burning electronics. I traced it to my den where the FRG-7700 was letting out all of it's "Magic Smoke".  A quick pull of the power cord and out the door we went. The whole radio was really HOT, and completely dead.

Last month I finally open the radio to attempt a repair and found the full wave bridge rectifier and associated space on the 12V DC Power Supply Circuit board burnt to charcoal/carbon. I also found that the mains wiring to the transformer primary were burnt, and shorted together.  What caused this catastrophe is still unknown, I suspect a power surge on the mains. It could just be a simple component failure due to old age, but for whatever reason, I found the radio functioned fine with an external 12V DC supply.

I had to replace the multi-input voltage PS transformer, build a new rectifier/filter/regulator circuit board, and install in the space of the old components. My fix has destroyed the antique value of the radio, but I also have it back in service, used daily, for just the cost of a new transformer.  All other parts were found in my junk box. 

I also added an additional fuse between the PS, and the radio circuit. I know it is just overkill, the primary fuse should protect everything, but it makes me feel better.



Walter (Mike) Meek, 16.Nov.11

Weitere Posts (2) zu diesem Thema.

Das Gerät wurde auch von Sommerkamp ( www.radiomuseum.org/dsp_hersteller_detail.cfm ) unter dem Namen "Sommerkamp FRG7700" vertrieben.

Mit freundlichen Grüßen,

Daniel Consales

Daniel Consales, 28.May.09

Weitere Posts (1) zu diesem Thema.