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Antennas : 2M- Make your own 2 metre 5/8 whip antenna
- This article is about a home made project of a whip antenna for 2 meters band. Includes lenght of whip for all frequencies from 140 MHz to 151 MHz both in mm and inches
[ Hits: 384 | Votes: 1 | Rating: 5 ]
- A comparison of 40 meter beam antennas
- This page describes a comparison study on seven different beam antennas for 40 meters band.
Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram
[ Hits: 266 | Votes: 0 | Rating: 0 ]
- 70 MHz 4m Slim Jin Antenna with Ladder Line
- An experimental slim jim antenna for 70MHz band made with a wireman slotted line.
[ Hits: 256 | Votes: 1 | Rating: 1 ]
- Double Bazooka
- Build a double bazooka antenna. This website offers pictures and diagrams of bazooka antennas for all Bands, from 6m to 160m
[ Hits: 433 | Votes: 7 | Rating: 4.86 ]
- Short Monoband Dipole Antennas - KGD Antennas
- The KGD antenna is an option for those with space restrictions. The idea behing this project is to provide a short dipole antenna for HF Bands and to allow operations on HF bands when its not possible to setup large antennas, using these short base loaded dipoles.
[ Hits: 240 | Votes: 0 | Rating: 0 ]
- Exploring The J-Pole Antenna
- The J-Pole antenna is a common omnidirectional antenna used in amateur radio, particularly on the VHF and UHF bands. This article is an attempt to explore how the J-pole antenna transforms feed-line impedance to free-space impedance, all the while providing gain found only in the more expensive commercial products.
[ Hits: 142 | Votes: 0 | Rating: 0 ]
- Indoor QRP HF Loop Antenna
- A home made magnetic loop for HF Bands. This small and compact loop is designed to support small power transmissions on HF bands, from 7 MHz to 21 MHz
[ Hits: 323 | Votes: 1 | Rating: 10 ]
- ZS6KMD 20-40m Multiband Dipole
- The dipole shown in this document is installed in an inverted Vee configuration, with two leg elements on each side held parallel to each other by 21cm spacers. The upper leg is for 40m and the lower leg for 20m. The spacers are made of 7mm plastic garden hose support for garden sprayers cut to 21cm.
[ Hits: 524 | Votes: 0 | Rating: 0 ]
- Top Band Receive Loop Antenna
- In this article the author shows the receiving loop antenna for 160 meters band installed at his QTH. Diagram and movie available. Article in in Turkish but can be translated in english
[ Hits: 382 | Votes: 1 | Rating: 1 ]
- 160 Meters 4 Square Receive Antenna
- A four square array receiving antena for the top band, performance is extremely directional and space requirements are really hard to fulfill.
[ Hits: 178 | Votes: 1 | Rating: 10 ]
- Semi-automatic antenna tuner project
- Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)
[ Hits: 291 | Votes: 0 | Rating: 0 ]
- Z-Match 100 and mini Z-Match
- This is a antenna tuner with wide range tuning for antennas with a Z of + 50 Ohms on all the HF bands.
[ Hits: 297 | Votes: 0 | Rating: 0 ]
- PJ5 St. Eustatius DXpedition by SP6IXF and SP6EQZ
- All HF Bands CW/SSB/DIGI CQ WW CW anb Online log
St. Eustatius DXpedition
[ Hits: 178 | Votes: 0 | Rating: 0 ]
- XZ2D Myanmar
- OH2BH will be active on all bands up to April 17 2020
[ Hits: 74 | Votes: 0 | Rating: 0 ]
- 5H4WZ DXpedition Pemba isl.
- Members of the Low Bands Contest Club (OM7M) will take part in an DX-pedition to Pemba Island AF-063 from 6.2 – 18.2. 2020. They will be on air from 160-10m CW, SSB, RTTY & FT8. Also participation in the ARRL DX CW and CQ WPX RTTY contests. The licence is issued and callsign will be 5H4WZ.
[ Hits: 166 | Votes: 0 | Rating: 0 ]
- FT991 MARS Mod
- This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
[ Hits: 917 | Votes: 5 | Rating: 3 ]
- Antenna Calculation Software
- The program consists of tabbed pages for various antenna and transmission line calculation. You can compute the values for an inverted L network that will allow you to match the 50 ohm output of the radio, or you can compute the necessary length in the units of choice for a 5/8 wave vertical for 10 meter band.
[ Hits: 434 | Votes: 1 | Rating: 10 ]
- Micro24 Cigarette Pack SSB QRP Transceiver for 20m
- The Micro24 is a ultra compact microsize QRP SSB transceiver for the 20 meters amateur radio band. This transceiver is so small that it fits into one hand.
[ Hits: 1160 | Votes: 7 | Rating: 7.71 ]
- WSPR monitoring with RTL-SDR and Raspberry Pi
- The goal of this interesting project is to monitor a particular set of frequencies for a set period of time. In this article your will find instructions to build and operate an all-band WSPR node using cheap hardware and free software. At the end of this you'll have a Raspberry Pi, connected to an RTL-SDR dongle that monitors all of the WSPR frequencies rotating randomly every 15 minutes.
[ Hits: 201 | Votes: 0 | Rating: 0 ]
- A 3.5MHz Receiver for SSB and CW
- Homemade receiver for 80 meters band. The receiver works very well (in fact better than some of its successors), especially the AGC makes listening to 80m QSOs a real pleasure. Sensitivity is not cutting-edge, but on a full-size short-wave antenna it is by fare sensitive enough.
[ Hits: 248 | Votes: 2 | Rating: 6.5 ]
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