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Dipole aerial for FM broadcast

A half wave dipole aerial for the band 2 fm broadcast spectrum (87-108MHz) A dipole is a basic aerial consisting of two opposing radiating elements which need to be cut to size to work with the frequency being used. Dipoles are known to be very reliable (even in harsh weather conditions) whi

Posted on:08-17 View:2063
How to Hook Up a GE RF Modulator

A GE RF modulator allows you to connect a video device, such as a DVD player or gaming system, that only uses RCA connections to a TV that only has a RF (also known as coaxial) connection. On TVs with RCA jacks, view the video from the video device using one of the TVs "Line" inputs (for

Posted on:08-17 View:540
40W FM transmitter

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

Posted on:08-13 View:3455
Hearing Aid

Description Commercially available hearing aids are quite costly. Here is an inexpensive hearing aid circuit that uses just four transistors and a few passive components. Circuit diagram Parts: •R1 = 2.2K •R2 =

Posted on:08-12 View:1776
How to Use RF Modulators

The advent of DVD players and home video game systems has transformed the world of home entertainment. For some people, however, the switch has not been so easy. People with older televisions--which lack audio/video inputs--are not able to hook many of these devices directly up to their TVs. En

Posted on:08-12 View:257
What Is an RF Modulator Used For

Outmoded home electronics still have a lot of entertainment potential, from vintage video game systems and VCRs, to elderly television sets. Getting them to work together can be an interesting exercise in nostalgia, often requiring the use of oddball pieces of equipment such as RF modulator

Posted on:08-11 View:587
150W RF amplifier circuit for FM transmitter

150w RF amp for 88-108MHz (band 2). The amp has 2 stages using a mosfet for the first stage (blf244) which requires 0.5-1watt of RF input to get about 20watts to drive the final stage (the good old SD1407) which can push nearly 200watts on this design! This design is more

Posted on:08-11 View:6964
How to Connect a RF Modulator

It seems as if every home garage across the country has an old, unused TV set sitting inside. People don't use them because they think that they can't use today's technology -- including VCRs, DVDs, MP3 players, camcorders and gaming systems -- on the old set. With a radio freque

Posted on:08-10 View:570
25 Watt Power Amplifie

Description This is a 25 Watt power amplifier complete with separate preamp and tone controls. In addition the circuit has a loudness control (to boost bass at low audio power) and options for super bass and super treble enhancement. This is ideal for Ipod's, MP3 or CD players or can

Posted on:08-10 View:2013
The RF Modulator - DVD Player Connection Option

The Need For The RF Modulator DVD is definitely a consumer electronics success story. It has been the catalyst for the acceptance of home theater, boosting the sales of TVs, surround sound receivers, and home theater speaker systems, and also paved the way for Blu-ray. However, the popul

Posted on:08-08 View:1323

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