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FT 200 schema     

                                                FT200 video...YouTube

The Yaesu FT-200 / FT-250 is an SSB/CW transceiver that covers the pre-WARC amateur bands from 80m to 10m. An early hybrid transceiver mostly tubes with a solid state VFO, it provides around 180watts PEP, good stability and a very good receiver design even under today's crowded band conditions. The design first saw the light of day in the late 60's in a gray and silver case. It was also sold by the European importers as the Sommerkamp FT250 and by Henry Radio of Los Angeles California in the USA as the "Tempo One" (black and silver case). Accessories included an accompanying FP-200 AC power pack to provided necessary voltages from one transformer for 117 or 234 volt AC mains and front firing loudspeaker. An external VFO FV-200 and a DC-200 12 volt power unit was also available for mobile use. The FT-200 was introduced in October of 1968 and sold into the 1970s.


           FT101E                   FT101TT ( Prototype )


The Yaesu FT-101E is a hybrid transceiver that employs a solid state transmitter, receiver, and a tube final amplifier. The tube amplifier consists of a 12BY7A driver tube that feeds a pair of 6JS6C tubes which provide a nominal output power of 130 watts PEP on SSB, 90 watts on CW or 40 watts on AM.The pair of 6JS6C tubes are matched to 50 ohms through a conventional pi-output network. The pi-network transforms the 3000 ohm output impedance of the tubes to 50 ohms. This pi-network also provides harmonic attenuation, and can actually be set to match a variety of output impedances from 25 to 100 ohms.A really neat thing about these transceivers is the fact that they were made with plug-in boards that could be easily pulled out of the transceiver and sent to the factory for repair. This modular design was unprecedented in the amateur community, which may help to explain why so many of the Yaesu FT-101's are still in use today.The FT-101E can transmit and receive on the 160 meter to 10 meter amateur radio bands. Reception of WWV is possible in the range of 10 to 10.5 MHz. Some of the other features included a built-in AC and DC power supplies, a true RF Speech Processor, a solid state VFO with 1kHz resolution, built-in and adjustable VOX, adjustable CW Side tone, a selectable 25 kHz and 100 kHz calibrator/marker, RIT control with +/- 5 kHz range, a built-in speaker and a eight pole SSB filter.






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