A simple tripler at 1267,2 MHz. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Civil radio communications
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Triple can be used in QRP transmitters. To increase the output power, it is necessary to supplement the circuit with an output amplifier.
The inductors are made in the form of microstrip lines.
L1 - microstrip line 7,5 mm wide and 22 mm long. The diode is switched on at a distance of 5 mm from the grounded end. L3 is similar to L2. L4 - microstrip line 2,5 mm wide of any length. L4 is located 6 mm from the earthed end.
In the absence of microwave trimmers (variable capacitors), they are made in the form of foil pads of about 5 ... 10 mm2, with a thickness of fiberglass 1 ... 3 mm. The design is made on a board of double-sided fiberglass with a thickness of 1,5 mm. Capacitor C3 runs on both sides of the board. The distance between L2 and L3 must be at least 10 mm. The feed-through capacitor can be made from capacitors of the KT or KD type. To do this, it is necessary to remove the paint with some kind of solvent and solder one side to the "ground".
Printed circuit board
Literature
- Ham Radio, Sept., 1975, p.36-45
Publication: N. Bolshakov, rf.atnn.ru
See other articles Section Civil radio communications.
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