long fil

30 links

Single support gain antennas for 80-160 meters - On 80 and 160 meters an antenna with modest gain and good front-to-back (F/B) ratio, along with a steerable pattern, can be very effective for contesting.
[ Hits: 3403 | Votes: 0 | Rating: 0 ]
160 meter linear loaded Inverted L antenna - The total length of the inverted L is 240 feet, which is 7/16th of a wave length long. It has a 92 foot horizontal linear load section 1 foot above ground that terminates into a home-brewed parallel network tuner by KN4LF
[ Hits: 4163 | Votes: 5 | Rating: 5.6 ]
Invisible DX antenna for the low bands - Article by DK5WL describes a multi-band DX antenna for the 160m-40m amateur radio bands with low visibility but great performance for long distance communication.
[ Hits: 7010 | Votes: 8 | Rating: 6 ]

40M Reversible Moxon - Moxon antenna project, each side is 51 feet long and the turned in sections are each 7.7ft long. This antenna performed similar to a full size two element yagi for 40 meters.
[ Hits: 4419 | Votes: 2 | Rating: 9 ]

Open Wire Feed Line a second look - Put up the longest dipole you can fit, feed it with open wire line, connect it to the balanced output of your tuner and poof! Instant multiband antenna. Is life really that simple?
[ Hits: 2680 | Votes: 8 | Rating: 6.69 ]

Another way to look at vertical antennas - What iss the difference between a dipole and a vertical? Maybe not as much as you think. Come along and try another point of view.
[ Hits: 4048 | Votes: 0 | Rating: 0 ]

6m Half wave vertical - This antenna is very useful for receiving or scanning purposes, but you can use it for transmitting, too. It is 2,94m long and has a pi-configuration (Collins-Filter) for the matching.
[ Hits: 3963 | Votes: 4 | Rating: 7.75 ]

ARRL contest branch - All ARRL contests for current year are listed along to generic ARRL contest calendar is also provided that gives the weekends for all ARRL events. The Contest Corral files include non-ARRL events.
[ Hits: 5343 | Votes: 8 | Rating: 5.62 ]

ON6DP QSL-Manager-Database - Qsl manager database files to download in multiple formats along to IOTA reference and other utilities
[ Hits: 977 | Votes: 6 | Rating: 3 ]

KC2KAX East Coast Long Wire Association - An ARRL affiliated club with many members who are interested in public and emergency service. The membership supports ARRL, ARES, CERT, RACES, NTS and Skywarn.
[ Hits: 471 | Votes: 0 | Rating: 0 ]

Cobham Microwave - Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.
[ Hits: 478 | Votes: 0 | Rating: 0 ]

Satellite for Beginners - Learn how to start using ham radio satellites for your DX contacts, PDF presentation by Dave Long
[ Hits: 988 | Votes: 0 | Rating: 0 ]

DK8KW Longwave Information - Useful pages of longwave operations, includes a lot of reference files, beacons list, sounds and pictures
[ Hits: 1463 | Votes: 1 | Rating: 8 ]

HSMM Long Range WiFi - High Speed Multimedia Radio Introduction by ARRL Working Group Chairman. Report of the High Speed Multimedia (HSMM) Working Group ARRL Board of Directors 2006 Annual Meeting January 22, 2004
[ Hits: 672 | Votes: 1 | Rating: 10 ]

G4ILO : Baofeng in my shirt pocket - UV-3R Review at G4ILO Blog with long textual review, pictures and some sound files
[ Hits: 562 | Votes: 0 | Rating: 0 ]

HamCalc v1.3 ^pop - HamCalc is a free collection of calculators for radio amateurs include Antenna ERP calculations, Attenuators, Audio Filter design, Coil Winding, Decibels, Great Circles map and calculator, HF Filters, HF Traps, Metric conversions OP Amps QRA Locator to Latitude/Longitude, Radio Horizon calculator, Resonance Satellite orbit calculator Timer calculations (555 timer)Zener Diode calculations Download zip By G4VWL
[ Hits: 28846 | Votes: 114 | Rating: 5.57 ]

Globe-S for RTL1090 - Globe-S for RTL1090 is a light radar viewer for RTL1090. It communciates via a HTTP interface and can be interfaced over long distances.
[ Hits: 711 | Votes: 7 | Rating: 7 ]

Spectrum Lab ^pop - DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more. Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle
[ Hits: 47778 | Votes: 56 | Rating: 6.97 ]

Interdigital bandpass filter designer - Fill out the form to design a bandpass filter as described in the January 1985 issue of Ham Radio Magazine. These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength
[ Hits: 1117 | Votes: 6 | Rating: 7.67 ]

The Box: Portable Emcomm Ideas - Intended for portable long-term usage and also good for Field Day Events article by By Steve KB1DIG & Kim KB1GTR
[ Hits: 1163 | Votes: 0 | Rating: 0 ]