4 MHz Amplitude Modulated RF Source - A while back I
needed an amplitude modulated signal source at 4 MHz. This
circuit was literally thrown together with parts laying on
the bench. I built it dead bug style on a piece of copper
clad board. It should work with little or no modification,
other than get it to oscillate, and at higher frequencies,
you might have to reduce the capacitor values a little.
40 Meter Direct Conversion Receiver
AM BroADCast Band Regenerative Receiver just two transistors!
AM DSB Transmitter for Hams - circuit diagram of simple double side band
suppressed carrier (DSBSC) transmitter for hams. Circuit uses crystal
oscillator, crystal can be switched for multi band operation.
AM FM Simultaneous Transmitter Using Digital IC
AM Loop Antennas (Bruce Carter)
AM Radio PreAmplifier
AM Receiver - This is a compact three transistor, regenerative receiver with
fixed feedback. It is similar in principle to the ZN414 radio IC which is now
replaced by the MK484. The design is simple and sensitivity and selectivity of
the receiver are good.
AM Receiver for Aircraft Communications
AM to FM converter
AM Transmitter (Andy Collinson) - The circuit is in two halfs, an audio
amplifier and an RF oscillator. The oscillator is built around Q1 and associated
components. The tank circuit L1 and VC1 is tunable from about 500kHz to 1600KHz.
Am-Receiver for Aircraft Communication 118.250MHz
AM/FM/SW Active Antenna - This circuit shows an active antenna that can be
used for AM, FM, and shortwave SW. On 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.
Amplitude Modulation of the AD9850 Direct Digital Synthesizer -
AN-423-Analog Device Application Notes
Designing an AM Receiver For Low Power Wireless Systems Using the NEC UPC2768GR
IC 7/22/96 - Application Note California Eastern Laboratories Doc #921
General Purpose RF Amplifier
How to Build a 300MHz AM RF Remote Control System
KD2BD ATV AM Video Modulator - video signal processing circuit that allows
adjustment of video gain, video bias, sync and sync level (added 6/06)
Limiting Amplifier Forms AM Modulator - EDN-Design Ideas
Micro Power AM BroADCast Transmitter - In this circuit, a 74HC14 hex Schmitt
trigger inverter is used as a square wave oscillator to drive a small signal
transistor in a Class C amplifier configuration. The oscillator frequency can be
either fixed by a crystal or made adjustable (VFO) with a capacitor/resistor
Micropower AM Band radio station
Pi Filter has Sharp Notch - Electronic Design - Simple filter network makes
a great low-pass filter having a sharp notch just outside passband. Can be
implemented as active filter using GIC circuit. Voted best of issue!
Pi Section Coupler
RF Amplifier for Ferrite Bar Antennas
SAW-based 434MHz transmitter schematic with RO2101
SP-Elektroniikka super regenerative receiver & SAW-based transmitter
Unamplified Four Foot Box Loop
X10 RF daughter board- receiver
ZN414 AM Receiver.