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The purpose of this page is to capture and document the Yaesu FT-101 series radios during the 1970's. It has taken me 12

years to collect a transceiver and every accessory to make a "complete station". I encourage your feed back, corrections,

and additions. I am not an Electrical Engineer, so I can not help with specific repair or substitution problems. I simply don't

have access to this type of material or equipment. My objective is to document the Yaesu FT-101 era and to provide a

detailed understanding so that the value of this equipment can be realized.

Thanks, Al-NW2M

FT-101 History FT-101 Model Numbers Physical Construction Advertised Features

General Specifications A "Complete" Station Station Accessories Tune-up Procedures

Known Modifications 6JS6C Tubes Basic Alignment Points QST / 73 / CQ

AM Operation Weights and Shipping Repair Facilities Original Prices

Mobile Operations Fox-Tango Newsletters Comments/Corrections Credits

About the author - Al Rabassa, NW2M

The FT-101 series of transceivers first appeared outside of the United States in 1970 and then inside the United States in late

1971. It gained overnight approval of amateur radio operators for its quality of signal, flexibility and for professional

attention to workmanship and design. The modular design of 10 solid state circuit boards on a common chassis with a tube

amplifier caught the eye of discriminating hams world wide.

It was a strong performer. Although far from perfect, the first FT-101's suffered from intermod when strong signals were

present during receive and generated spurs on transmit. Hams began to investigate these problems and offer improvements

to existing circuit design. The factory responded with a major modification which significantly improved the receiver of the

early FT-101's. The serial number revealed which transceiver was "early" and "late". So that the "early" FT-101 hams would

not feel obsolete, Yaesu offered the entire modification which made an "early" into a "late" and sold it as a kit along with a

25 page instruction guide. Problems began as many hams lacked the proper test equipment and the know-how needed to

make such an upgrade. After months of fighting with customers, Yaesu withdrew the kit (MIR-1 Modification Kit) and

would only install it at their factory. Adding to the confusion was the fact that there were five (5) different sub-models

within the "early" FT-101 series, the last being the FT-101 "late" model. The situation arose where identical FT-101 radios

sat side by side with the only indication of the internal layout was by the serial number.

Additional improvements were made and with the addition of the 160 meter band, the FT-101B was released. Yet more

Yaesu FT-101 HF Transceiver Home Page, NW2M http://www.qsl.net/nw2m/

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Inhaltsverzeichnis

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The purpose of this page is to capture and document the Yaesu FT-101 series radios during the 1970's. It has taken me 12years to collect a transc

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MMB-1 Mobile Mount for FT Series $19 $19 $23XF-30C CW Filter 500 Hz $45

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Rig Review| Harm. Spurs IMD | Min Sig BlkRng IMD DR 3rdO Icpt Issue | dBpep dBpep dBpep| dBm dB dB dBm

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One of the most misunderstood and mistuned modes available on the FT-101 transceivers is the AM (AmplitudeModulation) transmitter. (Second only to the

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Since FT-101 parts are sometimes very hard to find, please ask ANY repair facility how they obtain parts. If the simply callthe Yaesu factory, you may

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Or send email to: [email protected] 1/1/98Last Update: 04/08/2000 AORYaesu FT-101 HF Transceiver Home Page, NW2M http://www.qsl.net/nw2m/14 di 14 20/0

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improvements and the addition of a real "RF" speech processor led to the release of the FT-101E model. The "E" model wasfully refi

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FT-101E160-10 meter transceiver.RF Speech Processor.Three sub-models:"Early" - S/N 15,000 and lower. (PB1494) Processor"Mid" - S/N

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FT-101E/EE/EX(Mid)S/N 15,000-20,000PB1056 PB1314A PB1180B PB1183B PB1315A PB1181B PB1184A PB1076B PB1192 PB1534FT-101E/EE/EX(Late)S/N 20,001&UpPB1

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Solid state VFO, 1kHz resolution.Modulation modes - USB, LSB, CW, AM.Built-in, adjustable, VOX.Adjustable CW Side tone.Selectable 25kHz and 100kHz cal

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coverage from 160 meters on HF through 2 meters (USB, LSB,CW, AM). Here is a list of each accessory, description, andspecifications.FL-2100B/F/Z Linea

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YO-100 / YO-101 Monitor Scope Specifications:Vertical Trace PerformanceSensitivity: 200 mV P-P/cmFrequency Response: Direct 10Hz to 60MHzHorizontal Tr

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(zero-beat) the FT-101 internal marker located on the Regulator Board (TC1).QTR-24 Specifications:Time Format: 12 and 24 hour formatsAccuracy: Continu

Seite 14 - Last Update: 04/08/2000 AOR

Speaker Size: 4" x 6"Audio Power: 3 Watts RMSPatch Input: 4 Ohms, 600 Ohms (RCA, Shielded)Patch Output: 600 Ohms, 50K Ohms (RCA, Shielded)Te