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1.3W VHF RF Amplifier 2SC1970 88-108 MHz - This RF power amplifier
is based on the transistor 2SC1970 and 2N4427. The output power is about
1.3W and the input driving power is 30-50mW. It will still get your RF
signal quit far and I advice you to use a good 50 ohm resistor as dummy
load. To tune this amplifier you can either use a power meter/wattmeter, SWR
unit or you can do using a RF field meter. |
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1.5W VHF Amplifier - This project will explain the basic function
of a class-C transmitter. I will explain how to dimension a transmitter and
the purpose of the different components. I will also explain how you can
build a 1.5W PA transmitter. The project will include PCB,....(schematic
design added 03/08) |
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30 Watt VHF Amplifier - 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 cover 88-108MHz FM Broadcast Band.
However, the circuit is very stable at my place and provides a clean-output
through seven (7) element Butter-worth low-pass filter.... [Circuit designed
by David Celestin] |
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Advanced VHF Power Meter - (circuit / schematic design added 6/06)
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Capabilities Of Low-Cost High Voltage RF Power MOSFETs At Hf & Vhf -
Application Note Microsemi-formerly Advanced Power Technology APTB981 ( app note
added 05/07) |
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Convert 2m VHF FM PMR Transceiver Motorola Radius M110 into an Amateur Radio -
(electronic circuit added 7/03) |
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VHF Audio Video Transmitter - Build your own LC Meter and start making your
own coils and inductors. This LC Meter allows to measure incredibly small
inductances making it perfect tool for…(design added 08/08/08) |
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VHF beacon transmitter - Schematic only, no circuit description |
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VHF transmitter - ….(Circuit design added 04/09) [Peter Jakab, Electrical
Engineer, Engineer of Informatics] |
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VHF/UHF Prescaler - The recommended Prescaler is ridiculously simple. It
consists of just one IC, a TV tuner prescaler, the Philips SAB6456A, which can divide
by 64 or by 256. This chip is widely available both new and in the surplus
market at much lower prices than conventional divide by 10 prescalers. |
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VHF/UHF TV Modulator - Simple oscillator that generates a frequency in the
VHF or UHF region. The oscillator is modulated with the video signal and the modulated
carrier wave thus generated is fed into the TV set's aerial input via a cable. Then
all that remains to do is tune the TV to the correct frequency. |
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