RF011

                                          

CB Transmitter
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Schematic design of CB Transmitter
Part List:
Capacitors	Resistors
C1,9,10    =     100 nF Polyester C2           =       33 pF Ceramic C3           =     470 pF Ceramic C4           =      4.7 nF Polyester C5           =         1 nF Ceramic C6           =   10-60 pFTrimmer Capacitor C7           =      220 nF Polyester C8           =        10 μF / 25V Electrolytic C11         =        47 μF / 25V Electrolytic C12         =       1.5 nF Ceramic Others Y1,2    = Crystal (You can put the so much, those               who also channels that you want to               touch). MIC     = Microphone with preamplifier ANT1   = Aerial for CB (For the trials is enough a               piece wire of few metres but better               connects a regular aerial so that does not               have many stagnantly and burns the               transmitter). S1       = Switch to choice of receptor - transmitter,               if you combine the transmitter with the               receptor CB, you are supplied the               receptor from exit 12V OUT.  S2       = Switch to choice of channel. It has so               much places, those who also the               channels that you want.	R1         =    10K Ω ¼W R2         =  100K Ω ¼W R3         =      39 Ω ¼W R4         =    180 Ω ¼W R5         =  4.7K Ω ¼W R6         =    1M Ω ¼W R7         =  3.9K Ω ¼W Inductors J1,2,3   = VK200 (Inductor of high frequencies) L1,2     = Wires of copper with diameter 0,4mm               wrapped in plastic support of diameter               6-7mm of  core. For the L1 you wrap               13 coils. For the L2 you wrap 4 coils.               (As in the receptor CB.) L3        = Wrap 20 coils copper wire of               (0,3-0,4mm diameter) convolution               round a resistance 2,2 Ω/2W of coal. Semiconductors Q1,2    = BC108 Q3       = BD139 Q4       = 2N4427 (it is not replaced) Q5       = BD329 (or 2N3553)
Technical Data
Tendency of cateringe:.................................+ 12V DC / 1A Frequency of emission at AM:...............................~27 MHz Force of expense:................................................. 2.5 Watt
Schematic design of Charge 50W
Part List:
Capacitors	Resistors
C1     =    47 nF Ceramic C2     =   4.7 nF Ceramic Semiconductors D1       = AA119 or OA92	R1,2      =  100 Ω 2W Inductors J1        = VK200 (Inductor of high frequencies)
Notes
For the regulation it needs a voltmeter (with needle better) and charge 50W/5W. Connect charge 50W in the place of aerial, with the voltmeter in the exit voltmeter. Be supplied the transmitter with + 12V. It will be supposed we have consumption between 0,7-1A. With a screwdriver we regulate the core of inductor L1/L2 and later the variable C6 until we see the biggest tendency We connect the microphone and speaking we observe the clue in the multimeter. If all have become right will be supposed the tendency, speaking, to go up roughly 30-35%.

Source : Electronics Lab