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Yaesu FT-707 (S)
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Yaesu FT-707 (S) : ウィキペディア英語版
Yaesu FT-707 (S)
The Yaesu FT-707 is an HF transceiver for the 80-40-30-20-15-17-12 and 10 meter radio amateur bands. Its construction is based on a metal-cased transceiver with a dicast aluminium front. The rig can handle the AM, CW and SSB modes on the above-mentioned bands and has no general frequency coverage receive options. As a real 1970’s piece of equipment the FT-707 is equipped with numerous whistles and bells displaying a LED ‘lightshow’ in case they are all activated. Its frequency readout is available in a traditional analog (dish) mode as well as in a large digital display mode.
FT-707 was released in 1976 by the Japanese ''Yaesu Musen Corporation'' for appx $ 400 as a ‘compact size’ rig. This type was in production until 1979 and available as (FT-707 ) (100 watt output) and as (FT-707S ) (10 watt output) QRP version.
==Technical description==
The receiver front end uses a Schottky barrier diode ring module and by means of a developed gain distribution module this results in very good performance in the presence of strong signals. The lownoise premix local oscillator optimizes its receiving performance. Two 8 pole IF filters allow a continuously variable IF bandwidth and 6 pole optional filters are available for demanding operators.
The transmitter output is being generated by 2 multiple protected bipolar 2SC2290 and 2SC 2395 transistors. Final stage protection is included and band switched lowpass filters provide interference protection.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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