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Section 2
Operation

2.1 STARTING PROCEDURE

Caution

Set MlC GAIN control to OFF and EMISSION switch to LSB, USB, or CW to prevent accidental transmit condition before warmup or tuning

To turn on the KWM-2/2A Transceiver, set the function switch (1) to ON. This .turns on the power source being used with the KWM-2/2A. Allow a 1-minute warmup period.

2.2 SELECTING THE KWM-2/2A OPERATING
      FREQUENCY

Caution

The KWM-2/2A must be operated into a 50-ohm load with an swr not to exceed 2.0:I. Random-length wire antennas or light-bulb dummy loads can not be used. Conventional half-wave dipoles and beam antennas may be used only at, or very near, their resonant frequency Exceeding an swr of 2.0:1 can destroy the components in the output stage of this transceiver.

  1. a. Set the EXCITER TUNING and P.A. TUNING controls to the desired operating frequency. Refer to the logging scale calibration curves in figure 2-2. If the operating frequency is outside an amateur hand, ignore the amateur band markings on the dial scale and set the control according to figure 2-2.

    Caution
    If the transmitter drive is insufficient or receiver sensitivity is lacking, retune the trimmer capacitors according o paragraph 2.5.2.
  2. 1f the operating frequency is in an amateur band, refer to table 2-1. Set the band switch to the proper

   

    position for the desired operating frequency. If the operating frequency is outside an amateur band, refer to paragraph 2.5. From this paragraph, determine the crystal frequency corresponding to the desired operating frequency. Insert the appropriate crystal in the crystal board and set the band switch to the proper position for the installed crystal.


  1. Note

  2. Be sure to insert the crystal in one of the sockets corresponding to the band in which the crystal belongs. A crystal in band C, for example, should be inserted in socket IC, 2C, or 3C. Refer to Table 2-3 for a list of crystal frequencies and operating bands.

  3. Set the vfo tuning dial so that the bandswitch setting crystal band frequency lower limit in MHz) and the vfo tuning dial setting in kHz add to give the desired operating frequency.

    Note

    Before setting the vfo tuning, calibrate the vfo by setting the function switch (I) to the CAL position and zero-beating the calibration signal at the 0, 100, or 200 dial marking, whichever is closest to the desired operating frequency. Adjust the dial hairline so that it is directly over the dial 0, 100, 200 marking at zero beat. Set the function switch to ON.

    2.3 RECEIVER TUNING

    1. Refer to figure 2-1. Set function switch (1) to ON. This is the switch labeled OFF-ON NB CAL,. Refer to table 2-2.

    2. Set EMISSION switch (2) to desired sideband (USB or LSB position). Set BAND switch

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