From: jpd@space.mit.edu (John Doty)Newsgroups: rec.radio.shortwaveSubject: Low Noise Antenna ConnectionDate: 26 Nov 1993 16:55:24 GMT It doesn’t take very much wire to pick up an adequate signal for anything but the crudest shortwave receiver. The difference between a mediocre antenna system and a great antenna system isn’t the antenna itself: it’s the way you feed signals…
via Low Noise Antenna Connection — IW5EDI Simone – Ham-Radio
This was my first AO-10 antenna. As goofy as it looked, I managed a few contacts with 10 Watts, including Brazil on SSB. This is a pair of 8-element quagi’s, set up for RHCP. Construction is simple, with no critical tuning elements. They are made from 1/2″ PVC pipe and # 10 wire (stripped from…
This idea came about after listening to all you Amateurs tuning-up your amplifiers while on-air.It always happens right in the middle of receiving a good SSTV picture! This may give you the idea of building your own (cheap) dummy load and do your tuning through this.You can subsitute the shown value components to handle your…
Design Criteria: Simple wire antenna;Cheap to make, using readily available materials;Low angle radiation, with rejection of high angle signals;Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); andMaximum height is 40 feet (limitation due to treeheight). Design:Since the use of a full ¼-wave vertical was out of the question because of space reasons,…
via 80M Vertical Antenna with Capacitance Hat — IW5EDI Simone – Ham-Radio
After a Qth change last year, I was fortunate to get permission for an outside antenna. The new antenna was built with the following considerations in mind. At least 10 – 20m coverage Open wire feed to simplify matching the various impedances Loop design, because it is less sensitive to nearby objects and it requires…
A 2 element beam antenna for 10 meters band Living in a condo has many advantages, none of which is being able to mount a tribander on a 60-foot tower. So I make do with a long, thin random wire that works nicely as long as the New England wind, snow and ice don’t conspire…
via 2 element Yagi for 10 meters band — IW5EDI Simone – Ham-Radio
This is a simple dipole built for two-band operation that I made for portable use with my 20 and 40 meter QRP rigs. It was built to take along camping so I would only have to take & put up one antenna instead of two.The antenna consists of a regular 40 meter dipole using a 1:1…
Ever wanted to install a shortwave receiving antenna FAST?!!! Then I am almost sure that you will want to learn more about the “Inverted L” antenna… About the easiest effective skywire to build … Just two supports… may be two masts, a mast and a tree, a mast and a nearby building… it need not…
via The ever-popular inverted L antenna — IW5EDI Simone – Ham-Radio
The basic antenna is a vertical monopole, using elevated radials to complete the “ground plane.” I use it only on the weekends, primarily for contests, thus it is designed to be raised and lowered with a minimum of fuss. It is a full-size 40 meter 1/4 wavelength vertical, with from four to eight tuned radials…
via 55′ Vertical Antenna For 40/80/160 Meters — IW5EDI Simone – Ham-Radio
The G5RV is an easy-to-build 80-10 dipole requiring no traps. All bands are covered, including 30, 17, and 12. The G5RV has high SWR, by design, on most bands and a tuner is required. Unlike most dipoles, the “basic” design is not a 1/2 wave, but instead a 3/2 wave dipole on 20 meters. A…
The 75 meter dipole at K7ZB was put up to meet the need for making contacts with friends in the Southwest and Southern California. As usual, it had to be put up so no one can see it from the surrounding neighborhood.The objective was accomplished as shown below, which is the site drawing for the…
My QSL of the month: After numerous reports in the last years, Steve Diallo, Technical & Operations Manager confirmed today that I received Radio Free Africa from Tanzania. The station from Mwanza, the capital of the Mwanza region, directly at Lake Victoria, can be heard in the evening on mediumwave 1377 kHz, the reception is […]
Current ham radio news How do I apply to take a remotely-invigilated exam? If you are rescheduling a postponed or cancelled exam, you can follow the process below yourself If you are making a completely new booking you should contact your local club and ask the Exam Secretary to make the booking on your […]
Matthew Parij 