- Manufacturer / Brand
- Yaesu-Musen Co. Ltd.; Tokyo
- 1981–1984 ?
- Amateur-Receiver (amateur bands, may include broadcast bands)
- Radiomuseum.org ID
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Transistors
- 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
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8.5 cm = 3.3 inch
- Power out
- 1.5 W (unknown quality)
- Metal case
- from Radiomuseum.org
- Model: FRG-7700 - Yaesu-Musen Co. Ltd.; Tokyo
- Tablemodel with Push Buttons.
- Dimensions (WHD)
- 13 x 5 x 10 inch / 330 x 127 x 254 mm
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
- Source of data
- Shortwave Receivers - Past & Present (3rd ed.)
- Mentioned in
- RICOFUNK-Katalog 1983
- Model page created by Martin Bösch. See "Data change" for further contributors.
- Other Models
Here you find 282 models, 269 with images and 110 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Yaesu-Musen Co. Ltd.; Tokyo
The model is part of the collections of the following members.
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