Electronic pipes made of transmitters ----- Vacuum Tube Transmitter

Electronic pipes made of transmitters, Vacuum Tube Transmitter Keywords: tube launch, tube circuit, transmit circuit, amplitude transmission circuit This article describes a transmitter assembled with a 6PL amplifier electron tube. The circuit is shown below: wherein B1, B2, G, R1, R2, C2, C3, C4, and C5 are disassembled. Since the power filter capacitance in the suspect is too large, a color electric filter capacitor is used. L1 is selected from the magnetic ring of MX-2000 with 22mm enamel wire. L2 determines the transmit frequency of the radio. When the frequency is selected in the medium wave section, the L2 can be selected from 30 +50 on the medium wave magnetic rod, or the 13 mm enamel wire is wrapped around 90. This will fall between 550-1650 kHz this. If the short-wave band is selected, the L2 can be routed around 9 turns with a 0.5 mm enamel wire. The oscillator frequency thus constructed is between 6 to 18 MHz. C5 is the air double, its capacity is 360 pfx2. B1 is the original power supply transformer. High voltage part rectification modified 4 IN4007. B2 is the original output transformer. C2, C3, for the mica capacitance removed in the machine, where C2, C3 pressure is preferably more than 400V. R1, R2 can also buy cement resistance themselves. Because of the large amount of pneumatic power, its power is selected to ≥iw. TX is 1/4 antenna, which can be replaced by a coarse wire, and 'length is about 1/4 of the emission wavelength. The author chooses 3mm, 8m long enamel line. The entire circuit installation does not need to use a copper plate, directly with a tapered board, on it. Hole, shed welding. As long as the components are good, after the circuit will increase, the light can be seen in G, and the light blue electron flow is seen, and the sound of "咝咝" is accompanied. If there is condition, you can make a simple field strength, which makes the launch field to maximize by adjusting R2. The antenna can be installed vertically through the insulator on the wall. After connecting the antenna, entering 5W of an audio signal at B2, pulling the distance from a radio and transmitter, and the radio should be clearly received, and the distortion should not be obvious. If the exchange is too large when transmitting, the ground can be resolved. It was measured, and the transmit power was 4.5W, so the experiment must observe the relevant provisions of the National Bureau of Commission.

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