Search results

A Wifi (V)SWR Meter to build yourself

An home made SWR meter for 2.4 GHz. A DIY SWR meter that allow precise measurements and calibration of any WiFi antenna. This is test equipment everyone who build wifi antennas should have in their shack. Article is in french and include some videos.

Building a PEP Power circuit for all analogue watt-meter

A 3 element yagi antenna project for the 144 MHz band by PY5ALZ in portuguese

Design plan of an array of a two element yagis for 80m and a 3 element 40m antenna sharing a single 12 meters long boom by EA5DY

Making your own 2 metre (146 MHz) 5/8th wave whip antenna

10 Meter Easy to build wire dipole antenna

EF155A1 21 MHz monobander antenna by YU7EF

picture and dimensions of a coax loop antenna centered at 51.490 MHz

Near Vertical Incidence Skywave (NVIS) and the 40 meter Novice Sub-band.

This homebrew six-meter linear amplifier started off life as a "junker" Alpha 76PA h.f. amplfier. Power output is 800W

January 1955 QST article by W5DQV about constructing a Cubical Quad antenna for 14MHz PDF File

The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler

The webpage provides information about the Citizen Band mailbox DBO274 in Germany, with HTTP/telnet-access. It covers topics related to CB Radio, Packet and Digital emissions, and eleven meters band.

A magnetic loop antenna for 7 Mhz by ZL1BJQ

Every ham needs an RF power meter. Here is a high performance unit to build at home.

Backpacking, boating or mountaintopping ? Invest your time and pack this novel directional gain antenna on your next expedition

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

3 Element reversable quad antenna for 40 meters band

CB Radio and 10 meter Radio reviews & mods blog. Most articles are in Japanese

5/8 vertical groundplane antenna for six meters band

The circuit described below will substantially reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequencey by TREVOR, G3ZYY

This 40 meter Inverted V antenna was tested and tuned at a height of 35 feet and proved excellent results. The ends of the antenna are about 11 feet above the ground. Article and video available

Operating on 160 meters from a city lot is always a challenge. Here's how K9YC does it.

2 meter kilowatt linear amplifier

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.

A 40/80 meters dipole made with two loading coils based on a project by IK1ZOY

A bowtie antenna is a type of antenna that reputedly provides higher gain at lower radiation angles than a center-fed dipole antenna at heights considerably less than 1/2 wavelength above ground.

A simple center-fed dipole made just with a thin-wall PVC pipe, aluminum tape, and RG-8X coax

3d parts printed to build an EZ-Lindenblad 2 Meters LEO Sat antenna as designed from Anthony Monteiro

A home made yagi antenna featuring 6db forward gain and 22 Db front back

A project of a bobtail-curtain antenna for 10 MHz

The digital wattmeter project was created for the purpose of measuring power in the range of 300nw to 30w.

Building a 2 metre 144MHz VHF Yagi beam antenna, designed for portable use.

How to adjust your SWR on your radio and why.

RF Power Meter using for reading a standard Digital Voltmeter by Iulian Rosu, YO3DAC / VA3IUL

PCB for the DJ9BV Power Meter taken from DUBUS 3/87

A solutiom for the Ameritron AL-811(H) RF power amplifier, burnt panel meter lights. A common failure with the Ameritron AL-811 and similar amplifiers is that the panel meter lights burn out prematurely. These bulbs are usually integrated into the actual panel meter. The solution for this is to provide the meter backlighting with LEDs.

A moxon rectangle for 50 Mhz band

This small, light weight digital SWR and power meter uses an Atmel AVR Butterfly demo board and a Stockton type directional coupler.

This antenna analyzer measures complex impedance over the 1.6 - 33 MHz HF spectrum

A compact antenna for 160 meters, suitable for hams tha want operate top band buh have a limited space

The YB7ZGP Pamaton Repeater operates on a frequency of 146.76 MHz, serving the Martapura District in Banjar, South Kalimantan, Indonesia. This VHF repeater provides local communication infrastructure for amateur radio operators in the region. The repeater's operation is managed by Syah Riyan, indicating a local amateur radio enthusiast or group maintains the station. Repeaters like YB7ZGP are critical for extending the range of VHF/UHF communications, allowing handheld and mobile transceivers to communicate over greater distances than line-of-sight. The 146.76 MHz frequency falls within the 2-meter band, a popular segment for local and regional amateur radio traffic, often utilized for emergency communications and general ragchewing. Information regarding the _Pamaton Repeater_ is presented on a blog platform, suggesting a community-driven effort to disseminate details about this local amateur radio asset.

An 80 meter band vertical loop antenna setup

2 Meter Indoor Slim Jim Antennas for Cyclone Season and Other Uses by VK4MDX

A 2-metre Quad antenna project by K6WXA in PDF file

Plans and hex code for an RF wattmeter based on an Analog Devices AD8307 log amplifier.

A 27-28 Mhz quad loop antenna by Bernard Mourot F6BCU in french

Homebrew a 2 meter square dipole antenna

Details the Northern Amateur Relay Council of California (NARCC) as the regional coordinating body for amateur radio repeaters operating on the 10-meter band and above. It outlines NARCC's function in managing frequency allocations to minimize interference and ensure efficient spectrum use across Northern California. The resource specifies that NARCC operates in cooperation with the FCC and ARRL, indicating its recognized authority within the amateur radio community. The organization's role centers on repeater coordination, a critical aspect of VHF/UHF operations where multiple stations share limited frequency segments. It highlights the support received from local amateur radio operators, underscoring a community-driven approach to spectrum management. The site serves as a primary reference for hams seeking to establish or operate repeaters within the designated service area. NARCC's activities directly impact the operational landscape for _VHF_ and _UHF_ enthusiasts, providing essential guidelines and coordinated frequencies. This ensures orderly communication and prevents conflicts, particularly in densely populated areas of Northern California.