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The model FT-101E.277E SSB Transceiver is a precision built, compact high performance Transceiver of advanced design providing SSB (USB. LSB selectable). CVV and V1 modes of operation The Transceiver operates at an input of 260 watts SSB. 180 watts CW and 80 watts AM on all bands 160 to 10 meters. All circuits, except the Transmitter driver and linear amplifier, are transistorized and composed of standard computer type plug-in modules, permiting easy maintenance. The Transceiver is self contained, requiring only an an-tenna and an A.C. mains for home, portable or mobile operation. The Transceiver may be operated from 100/110/ 117/200/220/23-1 volts AC when appropriately wired but is normally supplied for 117 volt AC and 12 volt DC operation. The two way solid state Power Supply is an integral part of the unit. Two power cords are provided with the Transceiver. Selection of AC or DC power source is automatically made when the proper line cord plug is inserted. For mobile operation a separate switch is provided on the front panel to turn off the tube heaters while in the receive mode. In this mode the Transceiver draws only 0.5 amp. less than your auto dash lights. All accessories, such as VOX. break in CVV with side tone. 25 and 100 KHz calibrators, noise blanker, 10 MHz WWV are built in. In addition . dual VFO adaptor, crystal control adaptor, speaker and clarifier arc integral parts of the unit. Provision is made for the installation of 600 h crystal filter for the exper t CVV DX operator. The CVV filter is selected automatically when the Transceiver mode switch is placed in the CVV position. The entire Transceiver weighs approximately 30 pounds, is 13 1/2â wide, 6' high. 11 1/2' deep. Construction is of heavy-gauge steel which provides an extremely rugged package, virtually immune to the effects of vibration and shock The SP 101P1V277PB combination Phone patch and external speaker, is a valuable optional accessory for base operation. The unit features an elliptical type speaker for high quality voice reproduction. Other optional equipment includes the FV-101B/277B external VFO and mobile mounting brackets.
A Yaesu FT-101EE tuned to 7.180 (LSB) MHz. Many users left the protective plastic covering on to protect the face from scratching and dirt.
Yaesu FT-101 is a model line of modular amateur radiotransceivers, built by the Yaesu Corporation in Japan during the 1970s and 1980s. FT-101 is a set that combines a solid state transmitter, receiver and a tube final amplifier. Its solid state features offer high-performance, low-current characteristics and its tube amplifier provides an almost mismatch-resistant transmitter and tuner stage. FT-101âs were made with plug-in circuit boards that could be sent to the dealer or factory for replacement or repair. Until then, modular design was unprecedented in the amateur community. This also explains the fact why so many FT-101's are still in use today. The rig was sold worldwide as Yaesu FT-101 and in Europe as Yaesu FT-101 and as Sommerkamp FT-277. Because of its reliability it earned its nickname 'the workhorse'.[1][2][3][4]
Technical description[edit]
The original FT101 Series (1971-1977) had dual conversion, with 5 MHz Receiver first IF, a very stable and linear 9 MHz VFO and 3.2 MHz 2nd IF. They had a 12BY7A tube driver feeding two 6JS6C television sweep tubes providing a nominal output power of 130 watts peak envelope power in single sideband, 90 watts continuous wave and 40 watts amplitude modulation. The 6JS6C tubes are matched to the antenna through a conventional pi network. This transforms 3000 ohm output impedance of the tubes to a low impedance, typically 25 to 200 Ohms. These tubes were common to television sweep circuits in the day, and were in practice just as rugged and reliable in amateur service as genuine transmitter tubes such as the 6146.
These rigs were extremely reliable, and various improvements were made over the model range, especially to the receiver, from Mk1, Mk2, B and E models (very few F models were ever produced). This was also one of the first all-in-one box rigs, as it had a built-in mains and 12 V DC inverter power supply and even a loudspeaker, which made it ideal to use portable (it even had a carrying handle on the side). They also included two switched crystal-controlled positions for Novice license holders, who were restricted to crystal controlled transmission until the late 70's. This feature was also handy for fixed net operation.
All models after the Mk1 came with a PA fan, and the E models had a built-in RF Speech Clipper.
Thousands of these transceivers are still going strong today, as even if any parts do fail, they are readily replaceable with standard components. Sherwood Engineering lists this rig as having one of the most sensitive and quietest receivers of any rig.
Yaesu also brought out a pair of separates, using almost every circuit from the FT101 - the FR101 Receiver and FL101 Transmitter.
The Later FT101Z series (1978-1985) was a completely different rig, single conversion from a 9 MHz IF, lower power PA tubes and fewer plug-in circuit boards. It also had no 12 V power supply.
Specifications[edit]
The unit could receive from 10.0-10.5 MHz in order for reception of the WWV time and frequency standards. The unit could transmit and receive on the 160 m, 80 m, 40 m, 20 m, 15 m, and 10 m amateur radio bands. WARC band coverage was possible using aftermarket kits. All FT101 and FT101B rigs also included the 11 meter band, but only some FT101E and FT101EE rigs included the 11 meter band. The Mk2, B, E, and F versions included reception and transmission on the 160 meter band, as well. Although the Mk1 did not cover 160M, there was a spare band position, and some Yaesu dealers offered a 160M modification.
The unit can modulate using either upper sideband (USB), lower sideband (LSB), continuous wave (Morse Code), or amplitude modulation (AM). The power available in these modes is 130 W (SSB), 90 W (CW), 40 W (AM). The standard I.F. crystal filter used for transmission passed 300 Hz to 2700 Hz.
Accessories[edit]
Many station accessories were available including the FV-101 remote VFO,FL-2100 Linear Amplifier, SP-101PB Phone Patch with Speaker or SP-101 Speaker-only, YO-100 or YO-101 Monitor Scope, YC-601 Digital Display Unit, FTV-250 2 Meter Transverter, FTV-650 6 Meter Transverter, YP-150 Dummyload / Watt Meter, YD-844 Dynamic Desk Microphone and QTR-24 World Clock
Models[edit]
Many models in the FT-101 series were manufactured in its timeline:[5]
FT-101ZD
History and lore[edit]
Because critical circuit designs were kept to a manageable size, hams had no problem in offering circuit changes, isolating and repairing problems. This knowledge base was so active that in January 1972, Milton Lowens (call sign WA2AOQ), founded the International Fox Tango Club and the Fox Tango Newsletter. The Fox Tango Newsletters were published for 14 years covering the early FT-101s through the latest Yaesu transceivers in 1985.
This HF radio was the same model used by Jim Jones in Jonestown before the 1978 mass suicide.[5]
References[edit]
External links[edit]
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Yaesu_FT-101&oldid=870599977'
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