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R1: RESISTENZA DA 1KW
R2-6: RESISTENZE DA 10KW
R3-4-9: RESISTENZE DA 100KW
R5: RESISTENZA DA 120KW
R7-8: RESISTENZE DA 180KW
R10: RESISTENZA DA 82KW
R11: RESISTENZA DA 47KW
R12: RESISTENZA DA 22KW
R13: RESISTENZA DA 22W
TUTTE LE RESISTENZE SONO DA ¼W E AL 5%
18W FM Transmitter
Here's FM transmitter for commercial FM band that provides 18 watts of power. Since the electronic diagram is too large we decided to divide it into two parts. The first part is the actual FM transmitter while the second part is 18W RF amplifier. The circuit should be built...
A 2 stage 40w amp using 28v devices. RF input power should be between 0.5 and 1 watt. The diagram below shows a 2N3375 driving a 2N5643 but there are many other devices that will work. I used these 2 transistors just because they were cheap at the time. If any of the variable capacitors are at...
88-108Mhz FM Radio Transmitter
This is a fairly basic radio transmitter circuit that is produced by a Project Kits company, Quasar. There are 3 stages in this version. But can be modified easily to output around 4W instead 500mW!
The main circuit diagram is here:
This transmitter use pll chip MC145151 from Motorola and stereo encoder chips BA1404 with vco built in. BA1404 from MC145151 is to overcome the single-frequency instability in the BA1404. Modulation of the emission control BB910 frequency. B571C kept in control procedures, the procedures...
This fm stereo transmitter use pll chip MC145151 from Motorola and stereo encoder chips BA1404 with vco built in. MC145151 IC used is to overcome the single-frequency instability in the BA1404. Modulation of the emission control BB910 frequency. B571C kept in control procedures, the procedures...