1.5 Volt Tracking Transmitter: |
10W HF Linear Amplifier:
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2 Transistor FM Transmitters: |
2 Valve 40m CW Transmitter: |
222 MHz Transverter: |
2N2222 40 Meter CW / DSB Tranceiver:
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3 Watt FM Transmitter:
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30 Meter QRP Transmitter for Morse
Code: |
3W HF QRP Linear Amplifier: |
4 Transistor Tracking Transmitter: |
4 Transistor Transmitter:
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49MHz Walkie Talkie: |
500mW HF Linear Amplifier:
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56K RF Modem:
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80 Meter DSB Transmitter: |
807 and 1625 Valves:
data on vacuum tubes 807 and 1625 used in ham radio
transmitters. Describes various pin voltages and
different operation modes. |
AM / FM / SW Active Antenna:
This circuit shows an active antenna that can be
used for AM, FM, and shortwave SW. On the shortwave
band this active antenna is comparable to a20 to30
foot wire antenna. This circuit uses receivers that
use untuned wire antennas, such as inexpensive units
and car radios. L1 can be selected for the
application |
AM Transmitter:
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AT Volt Repeater Controllers:
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Basic FM Radio Transmitters: |
Basic RF Oscillator #1:
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Basic RF Transmitter for PIR Sensors:
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Battery operated FM rebroadcast
transmitter : Gives you
10 to 20 meters range and runs for months on a
single penlight cell. |
Building a Simple LF Exciter:
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Compact 20 14 MHz Direct Conversion
Receiver:
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Design of Brookdale AT Volt Repeater
System Exciter: uses a
pair of Hamtronics model TA4512-watt narrow-band FM
voice transmitters to develop video and audio
carriers on439.250 MHz and443.750 MHz
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Easy 2 Meter Transmitter:
This project is a simple transmitter using only one
crystal and will cover 145.00 to 146.00 MHz. The
crystal is a 44.9333 MHz crystal for 145.500
receive, as used in the Trio (Kenwood) 2200, PYE,
Motorolla, Tait equipment, to name but four. The
frequency of the crystal is not critical as almost
any other xtal for the 2-meter band will function
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FM Band Monaural Transmitter:
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FM Radio Transmitter:
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FM Radio Transmitter #1:
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Four Transistor Tracking Transmitter:
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Hear Amateurs on your FM Radio!:
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Light Sensing RF Transmitter:
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Micro Power FM Broadcasting Circuits:
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One Pot to Control Two Channels: |
Phasing SSB Exciter: |
: |
Simplest RF Transmitter: |
Small FM Transmitter: |
T Volt Transmitter:
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T Volt Transmitter:
allows you to send video to any television in the
house, Poptronix kit circuit |
Telephone Transmitter:
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Three Watt FM Transmitter:
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Two Transistor FM Transmitters: |
Two Valve 40m CW Transmitter: |
VHF / UHF T Volt Modulator:
Elektor January1985 |
VHF FM Transmitter: |
VHF Transmitter: |
Video / Audio Wireless Transmitter:
circuit diagram and project description |
Video emitter uses battery power:
08/30/2001 EDN - Design Ideas / The block diagram in
Figure 1 shows how to make a cable-free,
direct-video system. The system allows users to walk
from booth to booth at an exhibition to interview
people and to display the interviews in real time on
three screens at key locations. You can use the
small and simple system each time you need to
capture image and sound on the run. . |
Video to RF Modulator:
This circuit is a RF modulator which can be used for
modeling of video signal. |
Wireless Microphone #1: |
Wireless Microphone Transmitter: |
WLW 500KW Transmitter Schematic: |