Specifications
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 8 years, beginning in late 1971 and lasting through 1979. It was an
exciting time for the FT-101 radios and their owners.
There were no "A", "C", or "D" models produced.
A publication called the Fox-Tango Newsletter captured the "diary" of the FT-101's 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.
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. 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. Transitional.
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.
Yaesu FT-101 HF Transceiver Home Page, NW2M http://www.qsl.net/nw2m/
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