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TM-211A/E 144MHz FM TRANSCEIVER | Radioaficion Ham Radio

TM-211A/E 144MHz FM TRANSCEIVER

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Kenwood TM-211A/E 144MHz FM TRANSCEIVER

Manufactured: 1985 (Discontinued)


FEATURES

DCS system mounted: The latest in digital techniques are employed enabling digital code squelch and code alert. This feature adds another new dimension to amateur radio.

Panel oscillating machanism: The panel oscillating mechanism has been developed to increase freedom in mounting, a basic problem of mobile transceivers. This convenient feature enables the panel to be set in an easv-to-operate position.

Panel layout with excellent maneuverability: The microphone jack, conventionally provided on the front panel, has been moved to the rear panel where it takes the form of a flexible cable and connector. This frees the front panel, allowing the transceiver to be more easify integrated with auto interiors, and allows unobstructed operation and /iew of front panel controls.

Dual function keyboard and LED-containing keyboard facilitating memory recall (MR):

High reliability design: An aluminum die cast chassis is used in conjunction with printed circuit boards of glass material to provide increased reliability.

Quality transmit and receive audio:

  • External communications speaker, 77 mm in dia., supplied as standard.
  • Maximum 3% modulation distortion ensures a quality transmit signal.

Microphone audio check function built in: Provides a convenient method for checking the microphone and modulation circuitry.

SPECIFICATIONS

[General]

Frequency range:

  • 144 to 148 MHz (TM-211 A)
  • 144 to 146 MHz (TM-211E)

Mode...............................FM F3, F2 (Control signal for DCS system)

Anntenna impedance........................................50 ohms

Power requirement....................................1 3.8V DC ± 1 5 %

Grounding..........................................................Negative

Operating temperature.........................................-20°Cto + 60°C ( - 4°F to + 140°F)

External speaker impedance...................................8 ohms

Current drain

  • 0.5 A in receive mode with no input signal
  • Max. 5.6 A in HI transmit mode
  • 2.5 A in LOW transmit mode (Approx.)

Dimensions............140 mm wide 40 mm high 1 97 mm deep (projections not included)

Weight..............................................................1.25 kg (2.75 lbs)

[Transmitter]

RF output power (at 13.8V DC)................HI 25 Watts min.

Low 5 Watt approx. (adjustable up to about 1 5 W) TX duty cycle: 1 minute ON 3 minutes OFF

Modulation.........................................................Reactance

Frequency tolerance (- 10°C- +60°C).................Less than ± 1 5x 10 6

Spurious radiation................................................HI Less than -70 dB

LOW Less than -60 dB Maximum frequency deviation (FM)........................± 5kHz

Audio distortion (at 60% modulation)......................3% max. (300 Hz-3000 Hz)

[Receiver]

Circuitry............................................................Double superheterodyne

Intermediate frequency

  • 1st 10.695 MHz
  • 2nd 455 kHz

Receiver sensitivity........SINAD 12 dB less than 0.18 pV S + N/N more than 50 dB at 1.0 mV input

Receiver selectivity............More than 12 kHz (-6 dB) Less than 24 kHz (-60 dB)

Spurious response...................Better than 70 dB (except fa-IF/2)

Squelch sensitivity...............................................Less than 0.15 uV (threshold)

Auto scan stop level.......................Less than 0.18 /uV (threshold)

Audio output.....................More than 2.0 watts across 8 ohms load (5% dist.)

[Auto patch microphone (MC-48) supplied]-For U.S.A. version only

Impedance.........................................................500 ohms

[DCS control]

Code.................................................................NRZ equal length code

Modulation.........................................................MSK modulation

Frequency deviation..............±2.5 kHz or more + 5 kHz or less + 3.5 kHz Standered

Mark frequency and deviation................................1 200 Hz ± 200 PPM

Space frequency and deviation...............................1800 Hz ±200 PPM

Code transmission speed and deviation....................1200 bits/second ±200 PPM

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