amplifiers 2m

Mobile 2 meter halo antenna - This HALO design is not ground dependent and can be mounted atop a section of PVC.

A Tree Friendly 2 Meter Halo Antenna by KR1ST - Article on a 2 and 6 meters halo antennas that does not require a mast has a very low part count and can easily be built with a minimum of tools.

2 meters copper J-Pole - Plan and list of material needed for construction of a j-pole antenna for 144 mhz

The simple 144/440 copper pipe J - Projects by Dale Kubichek, N6JSX

IC706/FT817 portable whip antenna - Suitable antenna for owners of an IC706 or FT817, 857 and other HF portable transceivers. You can an be QRV in a few minutes on all ham-bands from 80m to 6m and even on 2m by PA0FBK

WB6BYU Tape Measure Yagi - A tape measure yagi antenna for 145.000 MHz suitable for ARDF

FBK 2/70 portable coax antenna - A small antenna for 2m and 70cm

A UHF Discone Antenna for scanners - Article on discone antennas by William K2MQJ and Rudolf KA2CWL

Shortened antennas - Drawings of shortened antenna for indoor usage, using short pvc tubes for 2 , 20 and 40 Mhz by f1rfm

VHF/UHF Folded Diplole - This is a two element colinear design for vertically polarized radiation. It may be constructed for use on either 2m or 70cm

I2MQP DX News - DX news bullettin collected and edited by mario i2mqp

DX Italia Propagation forecast - Propagation forecast for current month edited by I2MQP in italian

Accute Micro - China supplier of ceramic bandpass filters in standard resonator sizes of 2~6mm , 8mm , 10mm and 12mm with freqency from 400Mhz~4Ghz and sections 2~10

Juma kits - Ham radio kits, HF receivers,ssb and cw transceivers, morse keyers and linear amplifiers.

Yaesu VX-3 Features - A complete product page about the Yaesu VX-3 ultra-compact VX-3R 2m/70cm FM HT Transceiver

Naptech - Naptech buys and sells quality test equipment from hp, tektronix, including spectrum analyzers & peripherals, oscilloscope, frequency counters timers, signal generators, multimeters & voltmeters, RF & power meters, microwave amplifiers

RF Amplifier basics - Introduction to RF power amplifiers. Basics and guidelines. by wb0nni

Amplifier for 15 and 17 meter band - The two linear amplifiers are ment for use with QRP SSB/CW/FM/AM transmitters on the amateur bands 15 and 17 meters can be powered from a 12 volt DC supply by ON6MU

144 Mhz power amplifier 4CX250B - This page provides information on the design and practical implementation of a rather inexpensive 144 MHz high power amplifier using a pair of ceramic tetrodes type 4CX250B by LA0BY

A 20W Amplifier for 2 meters - VU2RAR basic VHF power amplifier suitable for 144-146 Mhz output power can vary from 3 to 25 Watts.

HV power supplies - WV0NNI 2,800 VDC @ 2 Amps Continuous Variac adjusts filament voltage. A voltage doubler circuit, well suited for smaller, compact linear amplifiers.

Designing Op Amp Audio PreAmplifiers - Design guidelines for Op Amp audio preamplifier circuits by Mike Martell N1HFX

40 Meters QRP AM/CW transmitter - VU2VWN project to homebrew a CW for 40 meters band

70 MHz Transverter - This purpose of this page is to give a brief description of a 70 MHz transverter that has been published in the Danish amateur radio magazine "OZ"

Vacuum tube liquid cooling system - This article describes an alternative to water as the cooling liquid for amateur radio vacuum tube power amplifiers. This cooling system is designed for adequate vacuum tube cooling, reasonable cost, and very low maintenance. By K8CU