pmr circuit diagram

Flower Pot Antenna for 2 and 6 mt - The diagram below shows the basic arrangement of the 2m Half-Wave version of the antenna. A 6m diagram is available too by VK2ZOI

The 4X4 Slimtenna - Development of the Slim Jim antenna for HF

Tony CB Store - Scanner, vhf uhf receicers, cb radio, antennas marine and PMR dealer in Rome Italy

AFR Enterprises - AFR Enterprises a leading distributor of electronic components, semicondustors, diodes, Resistors, Integrated Circuits across the USA.

Energon Solutions Ltd Priority listing - Energon Solutions are a online super retailer stocking a massive range of Ham Radio, PMR 446, CB Radio and Business Two Way Radio equipment and accessories.

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Integrated Circuit Audio Amplifiers - Circuit designs for IC audio amplifiers by N1HFX

Design Guidelines for JFET Audio Preamplifier Circuits - Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell N1HFX

Recovering old NICAD and NMHI Cells - Old Nicads batteries and sometimes NMHI batteries usually end up with several cells being short circuit, as they suffer from crystal growth in the electrolyte

Radio Beacon Controller - Radio Beacon Controller using an AT90S2343 with a block diagram of a Radio Beacon.

Semiconductors - Semiconductors, diodes and transistors, intregrated circuits

RF Dummy Load - The use of dummy load is mandatory for off-air adjustment of the transmitters. Build one.

Circuit Laws - Basic electronic circuit laws

A high perfomance Crowbar Circuit - The MC3423 can protect sensitive circuity from power supply transients or regulator failure when used with an external "Crowbar" SCR.

DC RF Sensing PA Switching - Circuit for dc/rf sensing pa switching from g8mny

QLF Filter - Microprocessor based interface designed receives a signal from a Morse key, processes it, and re-transmits it to the radio. A microprocessor in the circuit is pre-programmed with a proprietary algorithm which makes a number of measurements and adjustments to the less percise human generated code.

A low cost morse Trainer / Keyer - By Prof. T. K. Mani - VU2ITI

FT290 CW KOX Circuit - This is not actually break-in but just KOX circuit. It can only be used on the CW mode otherwise it keys up the Tx

Non-relay instant RF Switching - Coax lines to do the RF switching. The advantages are instant switching, no power wasting DC control circuits.

An Accurate Power Meter For QRP Ops - A circuit using two junkbox transistors and a garden variety op-amp that will let you accurately measure your rig\'s flea power down to milliwatts.

30 m Band Direct Conversion Receiver - The direct conversion receiver described consists of only a bandpass filter, mixer IC, VFO and audio filter. With only 22 parts, this simple circuit should take a few hours at the weekend to construct.

Oscilloscope Tester - Circuit to assist in the setting-up and calibration of oscilloscopes

70 MHz transverter - The G8TTI 434 MHz to 70 MHz transverter with block diagramm

UHF on a VHF Rig - This circuit enables fair copy of strong 444 MHz signals, off a local repeater, using a 2m rig and a 1/4λ 70 cm indoor ground plane antenna.