Described generator of a smooth range (GPA) together with the base receiver. have a range of 28 MHz, and transverter design S. Zutaeva - UW3FL (see "Radio", 1979, No. 1 and 1980. No. 10) allows you to create simple УSW complex in the ranges of 144 and 430 MHz. On transmission it can work in the modes and CW narrowband FM.
Schematic diagram of the GPA shown in the figure. It consists of a master oscillator (transistor V7). working in the range of 14...14. 25 MHz, a frequency doubler (V8), a frequency modulator (варикапеV6), microphone amplifier (transistors VI. V2), the signal limiter diodes V3, V4 & bass (V5).
When in FM mode, the microphone is connected to the connector XI. At the same time recovering the power circuit low frequency nodes. In the socket of the connector x2 insert the jumper. When the Telegraph disconnect the microphone and to connect the connector x2 of the manipulator.
To translate УSW complex on the transmission, it is necessary to close the contacts of switch SI will be filed with the constant voltage of 28 V for VHF / UHF transverter and a 12 To a remote antenna relay "the handover". Relay K1 will work and your contacts will connect the X4 slot with the release of the GPA.
Range overlap GPA frequency set selection of capacitor C15. the requested deviation is C14. Coil L1 formed on the frame 5 mm diameter wire PELSHO of 0.15. L2 on the frame 6 mm in diameter wire PELSHO 0,41; the trimmers from the magnetic core SB-12A. The first contains 30, the second 20 turns (bends from the middle). Chokes 1.3. L4 wound on the trimmers from the armor of the magnetic circuit ABOUT-30 wire sew 0,1 (1000 turns). Connector XI - SG-5. Relay K1 RES. passport RS4.569.423.
Editor's note. To ensure the work of the GPA in scoprono FM not necessarily insert the jumper in the socket of the connector x2. Appropriate upper circuit socket x2 to connect with the socket 3 connector X1, pins 2 and 3 of connector X1 to connect with each other.
Authors: G. Chliyants (UY5XE), N. Paliyenko (RB5WAA), Lviv; Publication: N. Bolshakov, rf.atnn.ru