cor circuit vhf

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.

40 meter delta loop - M0MCX - Pictures and details of a wire delta loop antenna for 40 meters band

40 meter shortened dipole - M0MCX - Interesting little project with a couple of loading coils by M0MCX

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

Remote Control Antenna Switch - The Remote Control Antenna Switch consists of two circuit boards. The control unit and the remotely controlled switch

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

VHF UHF antenna for mobile transceivers - A whip antenna for VHF and UHF handhelds or mobile radios

6 Meters and Up: SSB/CW DX - This is a group for amateur radio operators interested in VHF and UHF SSB and CW, primarily in North America. It's intended for general discussions of V/UHF operation, beacon information, reports of tropo and Es openings and anything else of interest to V/UHF DX enthusiasts

Amplitec linear amplifiers - HF VHF UHF amplifiers, designed by hams for hams, and morse keys manufacturer

Q-MAC - Tactical Radios Manufacturers of HF and VHF Transceivers, NVIS Antennas, Portable and mobile antennas for military and commercial use.

Improving Heathkit SB-220 - Circuit Improvements for the Heath SB-220 Amplifier

Circuit Improvements for the TL-922 - by Richard L. Measures, AG6K

PKTerm for windows - Pkterm 99 is a host mode terminal program for the timewave and aea tncs. it works with windows 95, 98, and nt.

Heathkit SB-200 Modification - Tuned input circuit modification by Tom Boza - NE7X

Negative feedback output circuit - Negative feedback is often referred to as shunt feedback in conjunction with emitter degeneration.

PA7TA RF Amplifiers - VHF UHF Amplifiers

KI0LE Amplifiers and Preamps - Picture gallery of vhf uhf amplifiers

A simple VOX circuit - Here is a 3 transistors 6 diodes circuit that is a Voice Operated Tx PTT control as well as an ANTI VOX circuit to stop mis-operation from Rx noise by G8MNY

Morse Code Beacon Keyer - This circuit stores a single morse code message as bits in an EPROM chip, the message is sent to a relay which can key a CW transmitter.

Duplexer for VHF and UHF - Duplexer to use two transceivers and one antenna VHF UHF in spanish

Improvements for TS-830S - Circuit Improvements and Maintenance Procedures for the TS-830S

Circuit Improvements for the TS-430S - by Richard L. Measures, AG6K

Filters and Ferrites in EMC - This article is about the characteristics and use of various filters and ferrites for solving amateur radio electromagnetic compatibility problems involving breakthrough of amateur signals into domestic equipment such as television sets, video recorders stereo sytems etc.

A regenerative receiver with 6SN7GT - Circuit to build a regenerative receiver

50MHz-Transverter 10m/6m from DK7ZB - This transverter was built in 1994, a discription in three parts (german language) for DOWNLOAD as PDF-files. Circuit, printed-boards and layouts in the files