The Kenwood TS-711
Multimode 2 meter transciever
| Factory Specifications | Modifications | Computer Interfacing | Links |
The unit puts out 25 watts. This is enough power for local communications, within the limitations of the 2 meter band. It is also enough power to run a good quality linear amplifier up to full rated power. I plan, in the near future, on getting a linear amp for this unit. Mirage makes a suitable unit, which puts out 160 watts, and is capable of multi-mode (including FM) operation. This should give me a respectable amount of power, for local operation, and still be within the capability of the 42 amp power supply which runs my shack. The Mirage has a clamed current draw of about 20 amps, which still leaves plenty in case I wish to operate the linear and my TS-440 HF at the same time. It is unlikely that I will ever wish to do this, but it is comforting to know that the capability is there if I need it.
Though this is of the same series as the TS-440,
and shares that unit's all mode operation, the TS-711a is a bit less capable.
In particular, it is missing many of the connections, which give the HF
unit so much of it's flexibility. The rear panel features an antenna connector,
ground, power connectors for 120v and 13.8 volt, computer interface, and
audio jacks. Most activity, on the two meter band, is FM, making it hard
for many ham operators to justify the expense of an all mode radio.
| Modes | LSB (A3J), USB (A3J), CW (A1), AM (A3), FM (F3), FSK (F1) | ||
| Antenna Impedance | 50 Ohms | ||
| Grounding | Negative | ||
| Power Requirements | 120v / 13.8v | ||
| Current Drain | Receive Mode with no input | 1.2 amps | |
| Transmit Mode | 6.5 amps | ||
| Operating temperature | -10 to +50 C (+14 to +122 F) | ||
| Dimensions | Wide
High Deep |
10.6 Inches
3.78 Inches 10.2 Inches |
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| Weight | 15.6 Pounds | ||
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| Frequency range | 144mhz-146mhz | ||
| Input Power | LSB, USB, CW, FM, FSK | 25 watts | |
| AM | 25 watts | ||
| Modulation | LSB, USB | Balanced Modulation | |
| FM | Reactance Modulation | ||
| AM | Low Level Modulation | ||
| Spurious radiation (CW) | Less Than -60 db | ||
| Carrier Suppression | More Than 40 db (With 1.5 KHZ Reference) | ||
| Unwanted Sideband Suppression | More Than 40 db (With 1.5 KHZ Reference) | ||
| Third Order Distortion | More than 26 db below one of two tones | ||
| Maximum Frequency Deviation (FM) | 5 KHZ | ||
| Frequency Response (-6 db) | 400 to 2600 HZ | ||
| Microphone Impedance | 500 to 600 Ohms | ||
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| Circuitry | Double Conversion Superheterodyne | ||
| Frequency range | 144mhz-146mhz | ||
| Intermediate Frequency | 1st: 30.265 MHZ, 2nd: 10.695 MHZ, FM: 455 KHZ | ||
| Sensitivity | LSB, USB, CW, FSK
(At 10 db S/N) |
less than .13uV | |
| AM (At 10 db S/N) | less than .13uV | ||
| FM (At 12 db SINAD) | Less Than 0.2 uV | ||
| Selectivity | LSB, USB, CW, FSK | -6 db | 2.2 KHZ |
| -60db | 4.8 KHZ | ||
| AM | -6 db | 2.2 KHZ | |
| -60 db | 4.8 KHZ | ||
| FM | -6 db | 12 KHZ | |
| -60 db | 24 KHZ | ||
| Squelch Sensitivity | LSB, USB, CW, FSK | 100 to 150 KHZ | Less Than 20 uV |
| FM | 1.6 to 30 MHZ | Less Than .32 uV | |
| Output | 2 Watts at 8 Ohms (5% Distortion) | ||
| Output Load Impedance | 4 to 16 Ohms | ||
| Frequency Accuracy | Less than .00001 error | ||
| Frequency Stability | Less than .00001 error | ||
Extended Transmit Frequencies:
- Remove the top cover and locate the control unit (X53-1410-XX)
- Cut diode D30, xmit now 141.000 TO 150.995 MHz.