homebrew vfo 27 mhz

21 mhz half wave GP Antenna  ^updated - 21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade

2m VHF antennas with high gain - 2m SSB/CW-12.5 Ohm Yagis with extrem high gain and small bandwidth. These Yagis were constructed as ultra-light, portable Yagis with extrem high gain. They have small bandwidth and are working from 144,0-144,8MHz with good SWR.

The Sperrtopf antenna for 2 meter band - By ON4CFC Pascal, describe how to build a Sperrtopf or Sleeve antenna for the 144 Mhz, PDF File by antennex

A Six element yagi antenna for the 50 MHz - Christoph petermann's df9cy six element yagi antenna for six meter band

50MHz Power Splitters - Splitting an antenna between two receivers or in use as the phasing harness in stacked antennas where there is a need to equally split the power from the transmitter between two antennas

Stacking for 50MHz - Summary of discussion on stacking antennas on six meter band

WB7PMP 4 and 7 eleemts yagi for 50 Mhz - Original drawing and design of a 4 and 7 elements yagi antenna for 50 Mhz

Single Coil Z Match - Single Coil Z Match, circuit Diagram and homebrewing notes

A two band halo for VHF Mobile - 50 and 144 Mhz with a single mobile antenna system

Magnetic loop antenna 10-30 MHz - magnetic loop for 10-30 MHz, using acetal rod former, aluminium foil conductor and copper-clad epoxy board capacitor

Simple Dipole Antenna for 2m - A simple portable dipole antenna for 144MHz

Quagi antenna for 144 Mhz - A modified W5UN Quagi design optimized for 144.050 Mhz

AMANDX Dipole - The longwire antenna is a very effective antenna for the listener who wants to cover all of the shortwave bands from 530 KHZ to 30 MHZ.a

Receiving Antenna Design - Learn basic theory on antennas, and notes on homebrewing efficient shortwave antennas

DK7ZB 144 mhz Yagis - High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.

KC9GNK 10 meter Beacon - Transmitting on 28.2836 MHz near Wisconsin Dells, Wisconsin

Quantum Antennas - 146/446 Mhz Dual Band, High Gain vertical Antenna

How to Work 6 Meter DX by W3EP - December 1998 QST World Above 50MHz copyright ARRL

6m technical docuemnts - A collection of scanned diagrams and designs, documents and modifications for 50 Mhz ham radio equipment

OK1DFC Zdenek Priority listing - EME traffic and 144 MHz up operations

Near-Real-Time F2-Layer Critical Frequency Map - This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space. The map shows the radio auroral zones as green bands near the northern and southern poles.

432 MHz Power amp - by RA3YCR

The 50MHz Assistant - Preamp & Power Amp By Alkberto, I0XGR

GJ4ICD's 8877 50MHz Amplifier - A Compact 8877 50MHz amplifier and Power supply

IK8MKK Home-Made equipment - Two 50 Mhz amplifiers and antenna switch