FT-707 / FT-707S

Yaesu
FT-707 / FT-707S

Specifications

Prices

Compact 80 through 10-meters transceiver for fixed and mobile CW / SSB / AM operations. 100 Watts power output, VOX, CW semi break-in. Variable IF bandwidth using two 8-pole filters allowing continuously adjustment from 300 Hz to 2.4 kHz, noise blanker, receiver offset tuning (RIT), crystal marker. Digital plus analog display of the operating frequency is provided. Ideated in Japan, year of introduction 1980.

Reference market : amateur-radio

FT-707 / FT-707S specifications

General

Frequency coverage
Receive [1]	3.5000 ~ 4.0000 MHz 7.0000 ~ 7.5000 MHz 10.0000 ~ 10.5000 MHz 14.0000 ~ 14.5000 MHz 18.0000 ~ 18.5000 MHz 21.0000 ~ 21.5000 MHz 24.5000 ~ 25.0000 MHz 28.0000 ~ 29.9000 MHz
Transmit [1]	3.5000 ~ 4.0000 MHz 7.0000 ~ 7.5000 MHz 10.0000 ~ 10.5000 MHz 14.0000 ~ 14.5000 MHz 18.0000 ~ 18.5000 MHz 21.0000 ~ 21.5000 MHz 24.5000 ~ 25.0000 MHz 28.0000 ~ 29.9000 MHz
Mode
CW / LSB / USB / AM

Receiver

Sensitivity
CW / SSB	0.25 uV (10dB S/N)
AM	1 uV (10dB S/N)
Selectivity
CW-N [2]	0.35 kHz (-6dB) 1.2 kHz (-60dB)
CW [3]	0.6 kHz (-6dB) 1.2 kHz (-60dB)
CW-W / SSB	2.4 kHz (-6dB) 4.0 kHz (-60dB)
AM	3.6kHz (-6dB) 6.8 kHz (-60dB)
Image rejection
60dB (80 to 12-meter bands) 50dB (10-meter band)
PBT (Passband Tuning)
0.3~2.4 kHz (-6dB)
NB (Noise Blanker)
Yes
RIT (Receiver Incremental Tuning)
± 3 kHz
AGC (Automatic Gain Control)
Fast, slow
Frequency stability
± 300Hz max over a 30' period after 10' warm-up ± 100Hz max after 30' warm-up
IF (Intermediate Frequency)
1°	8.9875 MHz
2°	10.76 MHz [4]
3°	8.9875 MHz [4]
CW features
Semi break-in

Transmitter

Output power
CW / SSB	100 W max 10 W max [5]
AM	30 W max 3 W max [5]
Spurious emission
<-50dBc
Carrier suppression (SSB)
>40dB
Unwanted sideband suppression (SSB)
>50dB (1kHz tone)
Intermodulation products (SSB)
<-31dBc
Audio response
350~2700 Hz (-6dB)
Microphone
500~600Ω

Features

Analog Dials
Main dial is calibrated every 50 kHz. Sub dial is calibrated every 1 kHz.
Display
100 Hz frequency resolution 10-segments signal meter LED bar
Antenna
SO239 50Ω
Power supply
13.5 VDC (negative ground)
Power consumption
1.5A RX 20A TX (100W)
Audio power
3 W on 4Ω
Audio output
Jack 6.35 mm (headphone)
Connections
RCA (audio line output) RCA (0dBm RF output for transverter) Jack (+8VDC for FC-707) Jack (CW key) Jack 3.5 mm (external speaker) 7-pin jack (ACC) 8-pin jack (FV-707DM external VFO) 8-pin jack (microphone)

Mechanical and environmental data

Dimensions
240 (W) x 93 (H) x 295 (D) mm, including heat-sink 240 (W) x 93 (H) x 270 (D) mm [5]
Weight
6.5 kg 5.9 kg [5]

500 kHz segment for every band, full 10-meter coverage in four segments.
With optional XF8.9HCN filter installed.
With optional XF8.9HC filter installed.
2nd and 3th IF resulting in a 8.9875 MHz signal, the same as the 1st IF, allow continuous adjustment of PBT.
FT-707S version.

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FT-707 / FT-707S description :

The FT-707 transceiver, also imported in Europe by the Swiss firm Sommerkamp and sold as Sommerkamp FT-767DX, was an ideal successor of the Yaesu FT-7B radio for both fixed and mobile operations. With higher power output, now 100 Watts, and a new digital counter was released two years later keep up the frequency coverage limited to a single 500 kHz segment but for all 3.5 ~ 30 MHz amateur bands, WARC included. The FT-707S, with 10 Watts power output, its a QRP version of this Yaesu transceiver. Main specifications are unchanged.

Available options include the FP-707 AC power supply, which provides the 13.5 Volts required. Also available is the FV-707DM external VFO, which provides twelve memories using a synthesizer which allows scanning in 10 Hz steps and offset from memory channels. More, the FC-707 antenna coupler for impendance matching to the 50Ω. All of the above accessories, plus a special mounting rack, are a must for vintage enthusiasts.

FT-707 / FT-707S power amplifier :

The input signal is amplified by predriver Q01 (2SC1589) and the push-pull driver stage, Q02/Q03 (2SC2395), and amplified further by the push-pull final amplifier, Q04/Q05 (2SC2290), which provides approximately 100 Watt of RF output. The RF signal is fed through bandswitch low-pass filter networks on the LPF Unit, then delivered, through a directional coupler, to the rear panel antenna jack.

Yaesu FT707 power amplifier schematic diagram

A thermistor on the final amplifier board provides detection of excess temperature. When the operating temperature of the final transistors rises to an unacceptable figure, control voltage developed at comparator Q01 (AN6552) is fed to Q02 (2SC1815Y), which drives Q03 (2SD592), providing operating voltage for a cooling fan on the amplifier heat sink.

Yaesu FT707 PA protection circuit

Control voltage is also fed to amplifier Q04 (2SC1815Y), and this voltage is delivered to the ALC line to the RF, IF, and AF stages.

FT-707 / FT-707S photo gallery :

Yaesu FT707 photo

FT-707 / FT-707S price

We have collected for your convenience the Yaesu FT707 sale price (Euro) and its trend over time. Useful to guarantee a cheaper purchase of this radio and to put it for sale in the second-hand market. Of course offers, accessories, warranty terms and conditions can lead to different figures.

Price	Date	Condition
EUR 155.00	2021-sep	Second Hand It works in reception in every band and mode, the TX side dont operate. For parts only
EUR 279.00	2021-may	Second Hand Working. The main body of the radio has some scratches
EUR 290.00	2021-mar	Second Hand FT-707S version. Lovely condition overall
EUR 333.00 (299GBP)	2020-oct	Second Hand This is completely stock and has not been hacked about with any modifications at all
EUR 305.00	2019-sep	Second Hand Sommerkamp FT-767DX version. Comes with FV-767DM digital VFO, FP-767 power supply, microphone and manual
EUR 299.00	2014-mar	Second Hand Good condition overall

FT-707 / FT-707S review

Abdalla -TOD-

19 november 2021

Very good radio, fantastic reception, of small dimensions. Valued 3.000,00 Reais in Brasil (~450 EUR).

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