SECTION 1~ SPECIFICATIONS GENERAL: Frequency coverage Number of Transistors and Diodes Modulation Type Rawer Voltage Current Drain ‘Antenna Input Size Weight TRANSMITTER: RE Power Output Frequency Control Maximum Frequency Deviation (10} Spare indicator (11} Dial lettering €12y Clip cord for calibration €13y Loudspeaker .
This transceiver is an extremely purged; completely solid state transceiver. State of thwart devices such as Integrated Citrons, Field Effect Transistors, var actor and Zenger diodes are engineered into tight knit straightforward electronic design throughout both transmitter, and receiver. . Reliability, low-current demand, compactness, excelled performance und ease of operation are the net result.
3.2 3.3 3.4 Location: ‘Where you place the transceiver in your automobile is noi critical and should be governed by convenience and accessibility entirely. Since (he unit is 5o compact, many mobile possibilities present themselves.: The nonsmoker; for instance, will find thematically of the auto ashtray will provide @ very handy place in:most modern cars; | 1n general, he mobile: mounting bracket will provide you with some guide as to placement.
3.6 ‘When: adjusting your salesman, whether mobile ot fixed, by all :means follow: the manufacturer’s instructions. : There dre some pitfalls to be aware of . For example: do 1ot attempt to adjust an antenna for lowest SWERVE when using a diode SWERVE meter not engineered for VHE applications. ‘Such readings will invariably have fervor ‘of 40% or tse an i line watt meter similar ‘o the Drake WV4 or Bird Model 23 with. VHF cartridge. . Further, when adjusting 3 mobile antenna, do so with.
Trimmers have been placed on the crystal board to assist you In “twerking” new crystals on frequency: Consult the trimmer location chart (Fig. 2) for their positions.
CONTROL FUNCTION Front Control and Tacks (Fig 34) High-Off-Low Switch: opens or ‘closes the 12 VDC “source voltage ‘o the transceiver. “In high" position, output power is 10 watts. "In low’ position, output power is 1 watt.: Elohim Control: cqntm]s audio output level of the receiver. Squelch Control: minstrels the squelch threshold poi of the receiver. . Microphone Jack: accepts 3 prong minibike plug supplied on microphone.
SECTION vV ON 51 Initial Preparations: 4. Connect the microphone to the microphone jack, b Connect: the antenna to the antenna coax connector: Make sure the coax line’is of the correct impedance (50 ohms) and is neither shorted nor open circuited. ¢ Make SUSE the function switch 15 i the off position switch then connect the power supply cord 'to 'the power supply jack.
SECTION VI THEORY OF OPERATION Receiver RE Amplifier and First Mixer Module The put signal is amplified by the fled effect cascade amplifies: Ol and Q2 (28K 195); and passed info the RE filter) This filters a high Q radicalized resonators with excellent band pass: characteristics and shockproof constriction: Therefrom cutout of the radicalized resonators the signal is fed to the gate of the first mixer,.
6.5 56 6.7 The signal from the microphone s amplified by Q1 and 02 (2SC3714), fed to the deviation limiter, which consists of DI, and D2 (1N6Us) and the active audio filter Q3 (28C371) and further amplified by Q4 (FISK) before beg fed to the modulation circuit in the transmitter oscillator unit.
6.8 Transmitter Power Amplifier ‘and Transmitter Automatic Protection ‘Circuit (APC) Module (L8 (B003) and (B-005) The signal from the multiplier and per-driver unit is amplification 1o 10 Walt by transistors Q125101 1) and Q2 (25CT03). Transistor Q2 is the power multistage and is coupled to:the antenna through the spurious filter consisting o L8, 19, and L 10 and the Auto mate Protection Liturgist. The APC acts to decrease the power output of Transistors QL and Q2 if ‘the antenna iz seriously mismatched.
(K ‘The Multipliers, driver ‘and:Power output stages should be aligned on LOW power first then set the function switch on HIGH power. ‘Align’ these stages according to the alignment chart provided. (See chart 1) Be careful not to trans out for more than 5 Second during each alignment step. As damage could be caused to the transistors due to overload during this procedure. 7.3 Receiver Aliment: : & Remove the microphone from the transceiver 1o prevent accidental: transmission during receiver alignment:: b.
ALIGNMENT CHARY (Chart 1) 1-20 VOLTAGE CHART UNIT MO NO. | NAME BASE | EMITTER | COLLECT | TEST POINT | ANY OTHERS Gas sl 7610} FET 1618} AID) GHQ LIS 810} o U2 Qi 2sca7i 22321525 4080 A6 e Q2 25K19 2G) h38) 80 “ 03 scant opa 0 U3 a1 scarves cPi oo0z04 CLEVELAND g o1 scan 024 0.03 Z8K30 oGl | oaE 4o (D) FET 7 ab | scavenge 280873 o7 o sis s0L, OFF.ON * a8 25Du3s 7.0 65 138 cr2 .
