uhf amplifiers

VHF UHF Ground Plane Antennas - Ground plane antennas for 144, 222 and 440 MHz

Weatherproof UHF and microwave cavity antennas - General circular-waveguide-horn antenna design

VHF UHF Scanner Antennas - Homebrew U/VHF scanner antennas using parts from other Antennas and spare stuff I had laying around. Antennas use a balun and 75-ohm coax to make it back to the scanners by KA6WKE

High Performance Yagis for UHF VHF - High-Performance Yagis for 144, 222 and 432 MHz

Bob\'s Antique Radio & Electronics - Quality restoration supplies for vintage radios, amplifiers and juke boxes. Supplies include capacitors, electrolytics, pilot lamps, AC power cords, dial cords, Novus polishes and reproduction items.

The Utah VHF Society - Promote and coordinate the installation and use of VHF/UHF amateur repeaters throughout Utah.

HF-series Power Amplifier - Manufacture HF-serie power amplifiers for global radio amateurs. Provide two models: manual HF2000DX and automatic HF2011DX-A

Super Antenna Systems - Super Antenna Systems for HF - VHF - UHF Portable Stealth Mobile Base Backpack EmComm Ham Radio antennas

Motorcycle mobile setup - A VHF UHF mobile operation setup with APRS tracking by wd6cmu

SV5BYR Remote HF station setup - Remote HF - VHF - UHF radio station using TS-2000 and remoterig devices

Arizona Ham Radio Repeaters - VHF and UHF amateur radio repeaters in Arizona

Fox Tango Yaesu Amplifiers page - A page dedicated to Yaesu FL series RF Amplifiers, from FL-2100 to FL-2000 FL-2500 FL-1000

EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications

TACLog - TAC Log by OZ2M is a VHF, UHF and SHF Contest log program

About HF Amplifiers - Article on evaluating HF Power amplifiers and review of popular PA by K0BG

ALC for real - Learn more about ALC usage in RF Amplifiers and how it really effects things from an operational point of view.

Using VNA to adjust Linear amplifiers  ^updated - Linear amplifiers cold adjustments with network analyser (VNA)

Converting the Amp Supply LK-500NT - A technician's nightmare. The NT or No Tune amplifiers from Amp Supply were the abomination of the amplifier world. The only way that I know of to repair these amplifiers is to clean out the mickey mo

4-1000A Homebrew HF Amp - Building an HF power amplifier based on a 4-1000A

Using cheap tetrodes in amplifiers - This article is written to dispel some of the misconceptions and misunderstandings about some of the tetrode based linear amplifiers, which are currently available on the amateur market.

A 100 Watt UHF Power Amplifier - Build a 100 Watt power amplifier using cheap, readily available junk radios

Home Made duplexer - Homemade UHF/440Mhz Amateur Radio Repeater Duplexer

Homebrew UHF Preamplifiers - Amateur Radio UHF Preamplifiers HJ-FET/GasFet

RF Probs and Watt meter - This RF probe can be used at High Frequency (HF) or Ultra High Frequency (UHF) on both 50 and 75 ohm coaxial cables.

Arcing or Gassy 572B Tube - Common problems of the 572B tubes often used in many RF Power Amplifiers