500mW PLL FM Transmitter 88-108MHz
500mW PLL FM Transmitter 88-108MHz This PLL transmitter is controlled and the frequency is very stable and can be programmed digitally. Transmitter will work 88-108 MHz and output power up to 500mW....
View ArticleBA1404 Transmitter with UPC1651RF Amplifier
BA1404 Transmitter with UPC1651RF Amplifier BA1404 transmitter includes onboard RF amplifier for increased transmitting range. Operating voltage range is 1-3V, the circuit contains FM stereo mixer,...
View ArticleFM Broadcast Transmitter
FM Broadcast Transmitter This FM Broadcast Transmitter circuit will transmit a continuous audio tone on the FM broadcast band (88-108 MHz) which could used for remote control or security purposes....
View Article50mW BH1417 Stereo PLL FM Transmitter
50mW BH1417 Stereo PLL FM Transmitter This is an excellent 50mW Hi-Fi PLL FM Stereo Transmitter that features BH1417 chip. ROHM's new Japan has BH1417 is one of the most simple and practical integrated...
View ArticleBandPass Filter
BandPass Filter This bandpass filter is in fact a combined high- and lowpassfilter. The first stages are a highpass (f70MHz) and the last stages a low pass (f
View ArticleFM Telephone Transmitter
FM Telephone Transmitter The FM telephone circuit is built on a PC board that is so small it can easily be fitted inside the housing of a telephone making it an instant pseudo-speak earphone. This FM...
View Article5W PLL FM Transmitter
5W PLL FM Transmitter Easy to build high-quality PLL FM transmitter with typical output power of 5 W and no-tune design. The transmitter includes RDS/SCA input and Audio/MPX input with optional...
View ArticleBH1415F FM Stereo PLL Transmitter
BH1415F FM Stereo PLL Transmitter Transmitter power amplifier, the output signal from BH1415F by 2 SC9018, 2SC3355, 2SC2053 amplified signal can reach more than 500 mW, adjusting well to achieve...
View Article75 Meter SSB Transceiver
75 Meter SSB Transceiver Here's 75 Meter QRP SSB Transceiver. In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the...
View ArticleBH1417 USB FM Transmitter
BH1417 USB FM Transmitter Here's BH1417 USB FM Transmitter with built-in PLL circuit. Its low-frequency signal is converted into high-frequency, which can take any audio device with FM radio (stereo,...
View Article5 Watt Transmitter
5 Watt Transmitter This is a very simple 5 watt CW TX based upon a TTL logic chip. There is just one tricky component and this is Cx. This component should have an impedance of about 10 - 50 ohms at...
View ArticleFM Transmitter Circuit
FM Transmitter Circuit Here is the circuit diagram of the simple FM transmitter using a transistor. Great performance or range is not guaranteed here, because this is an elementary design. General...
View Article80 MHz - 108 MHz FM Transmitter
80 MHz - 108 MHz FM Transmitter FM transmitter or often called fm transmitter uses 2 transistors in this article uses 2 transistors 2n2222. If the fm transmitter is in use voltage supply of 9 volt...
View Article3V FM Transmitter for 88MHz to 108MHz
3V FM Transmitter for 88MHz to 108MHz The important part of the circuit is formed of the Colpitts type oscillator. C3,C4,C5,C6,CD1-CD2 and L1 determines the frequency. BF982 and dual gate MOSFET are...
View Article80W RF Amplifier 88-108 MHz
80W RF Amplifier 88-108 MHz This is 80W RF power amplifier that boosts FM Transmitter's power using 2SC2782 bipolar transistors in a tuned class C circuit. RF amplifier can be driven to full 80W power...
View Article30Watt VHF Amplifier Circuit for FM Broadcast Band
30Watt VHF Amplifier Circuit for FM Broadcast Band The 30 watt amplifier schematic shown below provides an appropriate power boost with an input of 4 watt up to 6 watts. The circuit is designed to...
View Article2W RF Amplifier For 24/23 CM
2W RF Amplifier For 24/23 CM This page describes TX ATV Transmitter for 23 cm with output adjustable from 100 to 250mW.
View Article3 Watt FM Transmitter
3 Watt FM Transmitter This is the schematic for an FM transmitter with 3 to 3.5 W output power that can be used between 90 and 110 MHz. Stability of this transmitter is not bad and PLL circuit can be...
View Article3W FM Transmitter Amplifier
3W FM Transmitter Amplifier Presented is a three stage 3W FM Transmitter Amplifier using 2SC9018, 2SC2053 and 2SC1970 transistors. The circuit is supplied by 12-14V DC voltage and requires at least...
View Article30 Watt Linear FM Amp with BLY89
30 Watt Linear FM Amp with BLY89 A amplifier of medium force RF for the FM, is always essential for the amateur that wants it strengthens some small transmitter, that likely it has already it...
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