6m atu circuit

Dual band 6m/4m Yagi - This antenna was optimized with the goal to minimize any changes in 6jxx6 impedance/lobes. The result is a 7 el on 70 MHz with a little loss of gain comparing with the other monobands of the same lenght.

YU7EF Pop 6 & 7 Elements antenna - YU7EF Pop 6 elm for 50Mhz and 7elm for 70Mhz, a 4+6m douband with 12mm Alu tubing

4 element yagi for 6 meters - Project plan for a 4 element yagi beam for 50 Mhz in spanish

DL6WU 50 Mhz Yagi - 5 elements Yagi antenna with an 8.7 db gain

The Gain of an Endfire Array - This article looks at the maximum theoretically possible directive gain that could be obtained with an endfire array of given length or number of elements, and compares this with practical results in the literature.

G8JNJ Broadband HF Vertical Antenna - G8JNJ Broadband HF Vertical Antenna - Requires no tuner - great results from 40m to 10m plus 80m & 6m with reduced performance

The FD4 Windom antenna - This antenna originated from darc QRV magazine in 1971 should be attributed to DJ2KT, works on 80 40 20 10 meters without ATU, based on the Windom principle.

ST2NH's Radio Amateur Blog - ST2NH blog - first ham blog from africa fatures QRP,Homebrew,news,links

M0KHZ’s Blog - Dedicated to the world of homebrew amature radio.

W7GDY TriCity Amatuer Radio Association - Emergency communication is the cornerstone of this organization with the development of operating teams to provide volunteer backup emergency communications support to the cities of Goodyear, Avondale, Litchfield Park and surrounding areas

ECARC: The Eaton County Amatuer Radio Club

Mike And Key Amateur Radio Club - Mike and key amateur radio club is the home to radio amatuers in the pacific northwest.

What can D-STAR do for me? - Introduction to D-STAR features and advantages that this new technology can bring to you.

Current Ham Radio Satellite Status - AMSAT Operational OSCAR Satellite Status Summary list Operational , semi-operational, non operational and future launch status of all current amateur radio satellite

Fuji-OSCAR 20 - Present Status of Fuji-OSCAR 20

Acom 1000 70 Mhz modification - ACOM 1000 modification uses electric band switching, such that both 6m and 4m operation can be maintained.

FT-897 857 817 Cable - Multifunctional interface for Yaesu FT-8x7 Series Transceivers

Live VLF Natural Radio - A collection of VLF natural radio live streams. Where possible, streams are synchronised to provide stereo pairs with baselines of up to 4000 miles.

BeSpeak - BeSpeak is a real time HF beacon announcer. You select a band and the screen shows location, callsign and status of the beacon transmitting at that time.

5Spice - Analog circuit simulation program for the typical circuit designer. Commercial version for windows

Enable Low Cost RF Power Amplifiers - A new paradigm for low cost, reliable RF amplifier ‘pallets’ has been enabled by new circuit design, manufacturing and thermal management techniques

Power Aamps RF voltages - This test circuit is easy to duplicate, and demonstrates the extreme voltages that appear in an amplifier when the load is improper for the amount of drive power applied.

50 Mhz Amplifier - This is a homebrew 100 watt six meter linear amplifier. The project was designed by Pat Bunn - N4LTA, and was featured in the October 1990 issue QST magazine.

A fool-proof VOX - A circuit which had been used in many other application before. The configuration described here is optimized for IPHONE/radio operation.

Lightning Protection : Protecting each I/O line - KB22UT Article on how protecting ham radio station and in particular I/O Lines such as AC power, coax cable, control circuits, telephone line.