Owner: BroadcastHardware URL:http://broadcasthardware.blogspot.com/ Join Date: Wed, 26 Dec 2007 05:54:11 -0600 Rating:0 Site Description: FM TV Broadcast Transmitter online Information Site statistics:Click here
2.4 GHz Signal Generator 2008-05-12 20:03:23 This signal generator uses a free-running L-band VCO as it's source. It has a 1 KHz modulator, and a variable-level amplifier (-20 dbm to 3 watts), making it suitable as a source for antenna range measurements, which was it's design intent.It is reasonably stable for an unlocked oscillator, drifting no more than 300 KHz or so over an hour's time. This is stable enough for instrumentation measureme Read more:Generator
2.4 Ghz Field Strength Meter 2008-05-16 16:19:58 What can you use to test how effective your antennas are for 2.4 Ghz? Which antenna has the best gain or, how do you know that there is any 2.4Ghz RF transmitted? Here are the details on how to build a general purpose 2.4Ghz Radio Frequency Field
Strength Meter
.This one was built using the microwave rated diode from a MICROTEK solid state microwave leakage detector (purchased from Dick Smith Elect
A Small FM Transmitter With Loop Antenna 2008-05-16 15:16:43 This small Low Power FM transmitter with Onboard Magnetic Loop Antenna
that designed by Radio Morningstar. It's suitable for home fm broadcasting. As seen on YouTube Page.This is the PCB board layout for a small LPFM transmitter that i'l showed on Youtube. This new design is even more powerfull, using 4 instead of 2 transistors. The range will go up to 2 kilometers or even 4 - 7 km using een exter Read more:Small
, Transmitter
Stereo Encoder on A Chip NJM2035 2008-05-22 13:28:33 The stereo encoder consists of three main stages. Pre-emphasis, digital encoder and mixer stages. Pre-emphasis stage is achieved by using two 47K resistors and two 1nF capacitors. This helps to eliminate the noise that is produced during the FM transmission of your audio signal.Second stage that is built around NJM2035 is a digital encoder. All of its internal blocks except for two audio amplifier Read more:Stereo
, Encoder
Crystal-Based FSK Transmitter RF9901 2008-05-25 06:21:57 The RF9901 is an FSK transmitter that can be used to transmit FSK data using an RF carrier frequency in the range of 400MHz to 930MHz. This device is intended for and ideally suited to both European and United States ISM band applications. The RF9901 evaluation board (RFMD Part Number RF9901PCBA) utilizes a Colpitts oscillator to generate the reference frequency for the PLL phase detector. The PLL Read more:Crystal
, Transmitter
A Video Amplifier For Satellite Receivers 2008-06-03 00:43:41 Almost all receivers have a built-in level controls which are adjusted by their manufacturer to give the correct output level for a standard satellite input signal. In some cases this control can be advanced far enough to lift ATV signals to the same output level but most receivers will need this design adding to assist them. There is a penalty to pay for winding an amplifiers gain up, given Read more:Amplifier
, Satellite
, Receivers
30 dB RF Signal Attenuator For 1 - 500MHz 2008-06-09 07:24:55 This is a PIN diode based attenuator circuit operates with 1MHz - 500MHz input. PIN diodes are one of the most common parts used in RF applications generally as switches in transmitter and receiver circuits. They are usually placed at antenna or amplifier parts. In some applications PIN diode functions not only as switch but also only as potentiometer.Resistance of PIN diode is high when no curre
Wide Band RF Signal Amplifier for 10MHz - 500MHz 2008-06-09 07:18:37 This wide band signal amplifier circuit which is suitable for the frequencies between 10MHz and 500MHz. It will amplify your radio and TV signal, from band I - Band III, and a little Band IV.Wide band RF amplifiers are used in communication receivers, RF measuring equipment and tons of other devices. The circuit described here uses a state of the art transistor to get maximum performance at high Read more:Amplifier
300W RF Power Amplifier For 88-108 MHz SD2932 2008-06-09 07:04:39 This RF Power Amplifier
is a broadband power amplifier operating over the frequency range 88 - 108 MHz and using the new STMicroelectronics RF MOSFET transistor SD2932. Typical Acheivable Performances Device 1 X SD2932, Frequency 88-108 MHz, Vdd 50 V, Idq 200 mAPout 300 W, Gain >19 dB, Input Return Loss 70%Power Amplifier
Design: (Datasheet)1. Input Matching NetworkTypical input gate to gate impe
A Wifi (V)SWR Meter 2008-06-17 01:37:23 The circuit on this page serves as a Voltage Standing Wave Ratio meter or VSWR meter for the VHF-UHF-SHF frequency range. This includes the Wifi (802.11b/g), 2m, 70cm and 13cm Radio Amateur bands.The device consists of two parts. One RF head and a (preferably analog) indicator.The picture to the rights shows the Wifi SWR meter Mk-III - the third generation of the design.An external SWR sensor is a Read more:Meter
50-800 MHz Video Modulator With TDA6800(T) 2008-06-22 10:31:35 The TDA6800 is a modulator circuit for modulation of video signals on a VHF/UHF carrier. The circuit requires a 5 V power supply and few external components for the negative modulation mode. For positive modulation an external clamp circuit is required. This circuit can be used as a general purpose modulator without additional external components.Features· Balanced modulator· Symmetrical oscilla
100mW TV TRANSMITTER 2008-06-20 13:45:53 The TV transmitter circuit is simple and really quite crude, but it does include MONO sound. These are one 12v DC 1A series regulator chip, and one 8v DC 1A series regulator. I fed the 8v regulator from the output of the 12v regulator. The rest of the circuit looks like this.The RF GeneratorIt is a free-running Variable Frequency Oscillator (VFO) using just one coil and one capacitor to determine
1KW Mosfet FM Amplifier Service and Operating Manual 2008-07-01 11:40:13 High gain MOSFET transistors and systematic use of state-of-the-art manufacturing methods, have helped us to find effective solutions for the design of this new equipment. The amplifier, of simple and rugged construction, is able to satisfy the requests of all those end-users looking for top-quality equipment at reasonable prices. The RF power input is divided by 4 by means of a power splitter and Read more:Amplifier
, Service
, Operating
40 MHz Garage Door Opener Transmitter 2008-07-01 03:48:31 This electronic circuit is the newer and revised version of the garage door opener transmitter. The transmitter is a PIC based on 40 MHz Microchip’s 16F630 microcontroller. A 10 switch DIP-switch is used for setting the code. To save space, we used a different HF output coil.More about circuit Schematic , PCB files and hex code please download here Read more:Garage
, Opener
, Transmitter
Digigram Announced New VX and PCX Multichannel Sound Cards 2008-06-28 13:57:16 Digigram is taking advantage of the Broadcast Asia tradeshow in Singapore to announce the availability of a fully updated multichannel sound card range.Among the latest iterations of the VX series to be introduced in Singapore this week, the VX822HR (PCI interface) and VX822e (PCI express interface) are multichannel sound cards designed for demanding broadcast applications such as live-assist, per Read more:Sound
, Cards
Dalet 5.1 The World Standard for Radio Production and Playout 2008-06-27 00:54:29 Dalet 5.1 provides a comprehensive, end-to-end solution for radio stations seeking a digital production and playout system. Scalable, Dalet 5.1 grows with the needs of your operation. All music, audio files, associated metadata and programming information are stored in a central content catalogue which can be accessed from any workstation connected to a standard Ethernet computer network: a radio Read more:World
, Standard
, Radio
, Production
PIC FM Stereo Encoder 2008-07-22 07:47:26 This application circuit is a digital analogue processed stereo encoder that combines the best from both domains to provide high-quality and easy to build device. The sampling frequency used in this stereo encoder is 97 times higher than the pilot tone frequency. This makes very easy to reject all spectral residues around the sampling frequency without affecting the main signal characteristics. Us Read more:Stereo
, Encoder
AM Stereo Decoder with MC13208AP 2008-07-18 08:26:45 The MC13028A is a third generation C–QUAM stereo decoder targeted for use in low voltage, low cost AM/FM E.T.R. radio applications. Advanced features include a signal quality detector that analyzes signal strength, signal to noise ratio, and stereo pilot tone before switching to the stereo mode. A “blend function” much like FM stereo has been added to improve the transition from mono to ster Read more:Stereo
, Decoder
What is AM Stereo? 2008-07-16 03:31:31 AM Stereo
is the technology that allows AM radio stations to broadcast with high-fidelity Stereophonic sound, far exceeding the quality normally associated with regular monaural AM radio. AM Stereo provides clear full-dimensional Stereo sound that envelops the listener with fidelity usually thought of as something only found on the FM band. AM Stereo has been used all around the world for over two
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