los angeles airport

KE4UYP Linear loaded vertical antenna - This is a vertically and horizontally polarized antenna the Linear loaded 1/4 wave length vertical radiator introduces very little loss for 80 or 160 meters

Build a 2 Meter 5/4 Wave Antenna  ^pop - This antenna is unique in that it is enclosed entirely in 3/4" PVC by N1HFX

40-80 Dipole antenna - A 40 80 dipole antenna design by WA6ESC PDF File

20 meters Cage Dipole - Cage Dipole is based on the fact that a wireframe does emulate a tubing of the same diameter, supposed that the wires in the frame are close enough to resemble a solid surface.

Inverted Vee calculator - Online calculator for dipole and inverted vee antennas

Antenna Cable Loss and SWR - Calculate Cable Loss from SWR and reverse. Text file with only two simply formulas

Coax Cable Loss - Table representing loss of Coax Cables in db per 100ft.

Measuring Cable Loss - Improving measurement accuracy when low-power analyzers are used.

Better Feedline Loss Measurements with Antenna Analyzers - Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation

Magnetic Loop Antenna - Although a magnetic loop antenna(aka small loop antenna) is very compact, its efficiency is close to a half-wavelength dipole if carefully built.

LU9DPD Windom dipole - A multiband windom dipole antenna for 80 40 20 10 meters, feeded with a home made 4:1 balun, in spanish.

43.33 Km LOS with USB WiFi stick  ^{updated  pop} - Simple USB 802.11b WiFi adapter with original antenna test by adam 9A4QV.

IQ2C Amateur Radio Contest Team - The IQ2C Contest Team was founded in Cinisello Balsamo near Milano, Italy in 1997

K6PV Palos Verdes Amateur Radio Club - Founded in June 1975, as the Rancho Palos Verdes Amateur Radio Association, the PVARC is a non-profit organization whose purpose is to further the exchange of information and cooperation among members. Rancho Palos Verdes, California

K6AA United Radio Amateur Club - The United Radio Amateur club was formed back in 1927, and has served the South Bay area of Los Angeles for over 80 years.

Ham Radio Terms - This glossary contains general definitions of typical amateur radio terms

UHF Reject filter - This filter is a 0.1 dB Tschebychev lowpass with a rejection of 90 dB or better at 430 MHz, and 0.2 dB insertion loss at 72 MHz.

ARDF transmitter for 80 meters - The 80m TX described here is the well known ON7YD ATX-80 and timer, combined and re-engineered to fit a readily available enclosure by G3ZOI

WA6TWF Super System - The Super System has three repeaters on Santiago Peak, one in Anaheim, Orange, Santa Ana, Palos Verdes, L.A., Mt. Wilson, Fullerton, Pleasants Peak, and two in downtown Honolulu. Most of these repeaters have autopatch.

Near-Real-Time F2-Layer Critical Frequency Map - This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space. The map shows the radio auroral zones as green bands near the northern and southern poles.

Star Cards - Ham Radio QSL Cards - Custom QSL Cards are printed with the same quality as other STAR CARDS products. They are printed on a 14 pt. card stock using process color and a protective ultra-gloss UV coating on the front, and one ink color on the back.

Coax Cable loss and SWR calculator - This small window application will calculate Coax Cable loss from SWR and SWR from Cable Loss

Parabolic - This program calculates geometry, gain, losses, efficiency, directivity pattern and other parameters of primary fed and offset parabolic antennas.

HeliCoil - Inductance calculation for single layer, air-wounded coils and helixes up to about 800 MHz. Inductance calculations accuracy is around 1%. Also, coils with maximum Q for given inductance, resonant RF chokes, PI and T resistive attenuators calculations are provided. Skin effects, radiation losses and other minor side effects are not accounted in maksimum Q factor coils calculations. Program assumes using copper (Cu) enameled or silver (Ag) plated wire. Program is writen bilingual in English and Serbian by YU1AW

SWR vs. Loss - Table of power loss to SWR relation