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Description
Microwave transmitter, receiver, and various trasmission plates
The Transmitter
The knob on the Transmitter is a combination on-off switch and voltage control for the repeller plate of the Klystron. This is referred to as the "Repeller Tuning Knob." It is used to vary the repeller voltage to obtain maximum power output from the Klystron.
The Transmitter has been modified to incorporate an electronically tunable klystron so that repeated tuning of the klystron from one extreme to the other will not have any appreciable effect on the life of the tube.
The underside of the case is fitted with a standard 1/4 x 20 tripod thread.
The Receiver
The large knob varies the gain of the Receiver and is called the "Gain Control." The receiver has a jack to permit the use of an audio amplifier, or a public address system so that the received microwave signals may be heard, if so desired. The jack will also allow the use of an external meter, or oscilloscope.
The small knob is a part of the crystal detector assembly and should not be used except for crystal replacement or when specifically stated.
The meter on the receiver is a microammeter with full-scale deflection of 20 microamperes. All readings, unless otherwise specified, will be taken on the upper or "main" scale which is calibrated from 0 to 100. To avoid burnout or other damage, keep the Receiver Gain control set so that the deflection does not exceed 100 and preferably remains in the 85 to 90 range, unless otherwise indicated in the instructions.
The small plastic screw on the lower face of the meter can be used, if necessary, to zero adjust the meter.
The underside of the case is fitted with a standard 1/4 x 20 tripod thread.
Recommended Setup
It will be found most convenient to place the Transmitter on the Arm to the left of the user in most experiments. This arrangement permits the Receiver to be placed on the right Arm, thus providing maximum visibility of the Receiver meter. The Receiver and Transmitter are placed with the horns facing each other.
Place the four Arms at 90 degrees to each other, with the Transmitter and Receiver as described above. Note that each Arms is equipped with two different centimeter scales; one scale starts at zero centimeters and indicates the distance from the axis of rotation to the aperture plane of either Horn when attached to the Transmitter or Receiver. The other scale starts at 15 centimeters and indicates the distance from the axis of rotation to any accessory mounted in the Sliding Accessory Holder. A red arrow on the lower part of the Horn side of the Transmitter and Receiver, and a black arrow on the flat surface of the Sliding Accessory Holder indicate which scale is to be used.
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