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bath the transmit and receive crystals. The blanks used are 11 1 f" square which is not too commonly used in surplus crystals. Since the design range oi the equipment is 140 to 144 mc, there is little chance of getting surplus 703A units to fall in the 2 meter band. Those who desire may grind the crystals to the desired frequencies. While the technique is not difficult, it is beyond the scope of this article. The 3 pin sockets may be changed to the dual FT-243 type and tlicse inexpensive surplus units used. In any event, the formulas are as follows; Receiver:

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