NW2M Presents: The Yaesu FT-101 HF Transceiver Home Page Purpose The purpose of this website is to capture and document the Yaesu FT-101 series radios during the early 1970's. It has taken me 12 years to collect a transceiver and every accessory to make a 'complete station'.

1. Yaesu Ft-101ex Service Manual

Pagina dedicata agli schemi YAESU. RadioManual.eu YAESU (HF). FT-101EX: user manual. User manual: Credit to Yaesu Museum: FT-101ZD. Downloaded by Amateur Radio Directory. FT-101F Instruction manual Created Date: 6/16/2002 7:28:10 AM.

I encourage your feedback, corrections, and additions. The objective of this website 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 Web Page A Brief History of the FT-101 Transceiver The FT-101 series of transceivers first appeared internationally in 1970 and then domestically inside the United States in January 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 worldwide. 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 improvements and the addition of a real 'RF' speech processor led to the release of the FT-101E model. The 'E' model was fully refined with all of the previous problems having been worked out. This was the most popular and the most produced model by Yaesu in the FT-101 series. Three models of the 'E' were released. The 'E' model with all options, an 'EE' (economy) model lacking the speech processor, and the 'EX' (extreme economy) model lacking speech processor, 160M crystal, DC options, and microphone.

Last in the series was the 'F' model which contained all of the modifications, improvements and options throughout the series. Only a few of the 'F' models were made which also included an 'FE' (economy) and 'FX' (extreme economy) model. With fierce competition in the HF market, WARC bands on the horizon, IF shift, AF Notch/Peak, and digital readouts, the FT-101 series moved quickly to the analog 'Z' model and then to the digital 'ZD' models. The original FT-101 series lasted for 6 years, beginning in early 1971 and lasting through 1977.

It was an exciting time for the FT-101 radios and their owners. There were no 'A', 'C', or 'D' models produced. The FT-101 first appeared in the January 1971 issue of (page 147) sponsored by Spectronics. It would become a familiar full-page advertisement that would be used several times by Spectronics Inc as part of their global ad campaign. It set into motion a new wave of radios and ushered in an exciting time for amateurs worldwide! Each was hand-made by skilled workers with the utmost of pride.

Each was unique. A publication called the Fox-Tango Newsletter captured the 'diary' of the FT-101s for all time. Ten publications per year offered thousands of FT-101 owners the opportunity to share problems, solutions, and performance data.

The Fox-Tango Newsletters lasted for 14 years. It is the largest collection of user data and factory support information for any radio at any time. It has been preserved and full copies are still available today. Truly a testament to the era and popularity of these radios, even today. Here is a to the Fox-Tango Newsletter page.!Safety! Before we go any further, it is paramount that you understand that high voltages exist within these radios, cables, and accessories.

Safety is first and foremost! The FT-101 radios and accessories have voltages which include: 100V, 117V, 240V, +150V, +300V, and +600V. These voltages exit the radio and appear on interface cables. There are no warnings! Within the high power FL2100 amplifier, there is a +2,600 Volt power supply! Within the YO-100 oscilloscope is a +1,300 Volt power supply and a cathode ray tube (CRT). Special tools are required when working on these radios, accessories, and interface cables.

Professional repair and service are highly recommended. The following information is presented solely for informational purposes and historical reference. What's in the Name? There are many models which proudly display the FT-101 logo. Please be sure that you know which model you have, know its operating capabilities, and limitations. Normally, the longer the model number is, the less capabilities it has for that model.

The last 5 digits represent the serial number. Any serial number prefix is for factory control and routing. Buyers and sellers of the original models needed to know the to finalize any deal. Here is the complete list: FT-101 - 'Early' model 1971, first offering in United States. Serial numbers below 25,000. Known for strong receiver overload, TX spurs, and audio problems. 80-10 meter transceiver.

FT-101 - 'Late' Model Serial numbers above 25,000. Major modifications to receiver, Regulator, IF and audio boards. 80-10 meter transceiver. There were five FT-101 sub-models known: (based upon MK-160 160 Meter kit information). Mark 0: Serial numbers 06000 and below. First 'Early' models during 1970.

Mark 0A: Serial numbers 06001 to 07991. Mark I: Serial numbers 08001 to 23999. Most common 'Early' model. Mark II: Serial numbers 24000 to 24999. Transitional models with 160M tank circuit.

Mark IIA: Serial numbers 25000 and up. First 'Late' Models. Beware: Early and Late model circuit boards may not be fully interchangeable! FT-101B - 'Early' Model Serial numbers below 6,000. Improved IF (PB1183B) and Audio (PB1315), and Blanker (PB1292) boards. 160-10 meter transceiver.

FT-101B - 'Late' Model Serial numbers 6,001 and up. Improved Regulator (PB1314A), IF (PB1180B), and Audio (PB1315A) boards. 160-10 meter transceiver. FT-101BS Special FT-101B model for Japan Market. Single 6JS6C tube, 50 watt output. FT-101E 160-10 meter transceiver. RF Speech Processor.

Three sub-models: 'Early' - S/N 15,000 and lower. (PB1494) Processor 'Mid' - S/N 15,001-20,500. (PB1534) Processor 'Late' - S/N 20,501 and up. (PB1534A) Processor, (PB1547A) Regulator, (PB1183C) IF, (PB1315B) Audio, (PB1582) Blanker. FT-101EE Economy FT-101E model. All FT-101E specifications except, No Speech processor (available as an option).

FT-101EX Extreme Economy FT-101E model. All FT-101E specifications except, No Speech Processor (available as an option). No DC Converter for Mobile use (available as an option). No Microphone, DC cord, or 160M crystal, 10A crystal only. FT-101ES Special FT-101E model for Japan Market. Single 6JS6C tube, 50 watt output. FT-101F Latest in the FT-101 series. A book of the offices of spirits.

All updates applied. 160-10 meter transceiver. 11 meters as AUX position. Improved (PB1582) Noise Blanker.

Yaesu Ft-101ex Service Manual

Speech Processor and DC Converter. FT-101FE Economy FT-101F model. All FT-101F specifications except, No Speech Processor (available as an option). FT-101FX Extreme Economy FT-101F Model. All FT-101F specifications except, No Speech Processor (available as an option).

No DC Converter for Mobile use (available as an option). No Microphone, DC cord, or 160M crystal, 10A crystal only. There were no 'A', 'C', or 'D' models ever produced.