137 mhz yagi

Building High Power, High Q, Loading Coils - This page describes the loading coil (inductor) that W8WWV built for my center-loaded 160 meter (1.83 MHz) vertical antenna.

3 Element yagi for 17 meters band - 17 Meter 3 element TA33 junior mono band yagi antenna conversion project by K6TC

2 meter 1/4 wave Ground Plane - 146 Mhz quarter wave antenna plan

144 Mhz Magnetic Loop - A magnetic loop antenna for 144 mhz, two meter band

2 Meter Turnstile Antenna - Here are construction plans of a Turnstile antenna that can be used for space communication on the 2 meter amateur radio band. Specifically for 145.80 mHz

Coax cable dipole antenna for 10 Mhz - Coaxial Cable Dipole for 30 meters band by I2NDT with detailed pictures of his dipole antenna setup.

HB9MTN DDRR Antenna for 50 Mhz - Pictures and dimensions of and HB9MTN DDRR antenna for 6 meters band

Quadrafilar Helix antenna for 436 Mhz - This is an antenna that author just built. Was intend for receiving the AO-27 downlink (at 436.800 +/- doppler). It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB.

440 Mhz J-Pole Antenna plans - Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary. The dimensions aren’t typical however, this is what it took to get its SWR low.

Building baluns  ^pop - How to easily home-brew baluns even in strange formats 1/1 - 2/1 - 4/1 - 6/1 - 9/1 - 12/1 et 16/1 for bands from 1.8 to 30 (50) MHz in french

"Halfer" End-Fed Halfwave Antenna  ^pop - End-Fed Half-Wave Antenna for the 7 or 10 MHZ amateur bands intended to provide a very simple to erect yet effective portable QRP antenna.

144-430 portable j-pole antenna  ^pop - A portable dual band j-pole antenna

Super J-Pole for 435MHz - The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a folded matching stub by vk6ysf

An Unusual Magnetic Antenna - This article by OK1FOU describes how to build a relatively small loop antenna which can be placed for instance at the balcony. It is especially suitable for a two band antenna covering two adjacent amateur radio bands (10/14 MHz, 14/18, etc.)

The G3BGR Magnetic Loop - This ia a home built Magnetic loop antenna which was used by G3BGR, indoors on 7,10 and 14Mhz. The basic idea was in Radcom 1986

144/430 dualband J-Pole antenna - A simple and cheap dualband j-pole antenna for 144 and 430 MHz

23cms antenna - The DL6WU 23cm YAGI, The Bassoon 3 band J-Pole antennas, pictures and building plan

Freebanders antenna systems - Yagi Quad's and Verticals simple explanations about freebanders antenna systems

Rete QRSS/QRPp a 28.322 MHz - A QRSS Blog

Portland Amateur Radio Club - One of the Portland ,Oregon metro area's oldest club, all are welcome, if you are in the area, our club repeater is on 146.840 mhz

Comtechpst.com - High Power RF Amps - Comtech PST offers solid-state power amplifiers in frequency ranges from 1 MHz through 3.6 GHz, with output power levels ranging from 5 watts to over 30 kW

I0SKK - 10 MHz QRPp beacon - Pictures and schematics about QRPp experiments using QRSS on Ham Bands as 10 MHz, 7 MHz,

Linrad - Multiplatoform freeware DSP software. Linrad has its origin in software that was developed for 144 MHz EME CW but it is quite general and should be seen more like a kit for designing a receiver that a receiver for some particular usage. It can be used as a CW receiver with a small time delay and a fast waterfall graph. A dsp for conventional receiver to imporve signals readability, a spectrum analyzer.

AM-6154 FAA Amplifier circuit conversion - AM-6154 222MHz grid Conversion Information by N0UK

A low cost dummy load - This article describes a low-cost, low-to-moderate power dummy load, which presents a 50-Ohm resistive load from HF through 440MHz.