grid sq maps

PMR 446 external antenna - A slim jim PMR 446 Mhz antenna in spanish

40 meter 4-square antenna - A permanent working 40 meter system based on a 4-square antenna

Using the half-square antenna for low bands - Can’t put up a really high horizontal antenna for 80-meter DXing? Maybe the vertically polarized Half-Square might be the antenna for you.

Broadbanding the half-square on 80 meters - N6LF discusses a simple way to broadband the classic half-square antenna to operate in both the CW and SSB DX windows on 80/75 meters.

Coax Dipole Calculator - An efficient program to calculate dimensions of coax dipoles, or bazooka antennas considering velocity length of different coax cables. Express dimensions in feet/inch and meters/cm. Freeware by VE3SQB

Loop Antennas and Calculator - The purpose of the calculator is to give you a quick overview of the feasibility of "squeezing" a loop into your available yard or apartment space. The calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from 12-18 AWG.

Length of a Resonant Square Quad Loop - Calculating the length of a resonant square quad loop

Hula Hoop Loop antenna - The concept of the "Hula Loop" came after many years of building medium wave loops of varying size, shape and performance. Usually these loops are constructed on a square wooden frame, with wire being wrapped around the periphery

Four square phased verticals - TK5EDP 4 square phased vertical system in corse isl.

AA1TT/B - 28.269 CLAREMONT, NH grid FN33uj

DXCC List with your beam headings - You can have your persolal DXCC country list with correct beam heading calculated on you grid square location by ok2pbq

Russian awards for HAMs. - CORA - Cities Of Russia Award, TZA - Time Zones Award, Transsib, Baikal Lake Award, Baikal Winteriada, GLORIA - Grid Locators Of Russia International Award. Look for details at the site.

SIARC Squaw Island Amateur Radio Club - SIARC is not for profit corporation located in Ontario County, N.Y

Long Island Amateur Radio Club - 575-Long Island Amateur Radio Simplex Club, Operating locally on 147.575 FM Simplex from Grid Square FN-30

Haverford Squid Poles - Haverford stocks a large range of multi-purpose telescopic poles. They are high quality fibreglass construction with approximate wall thickness of 1.1mm

US grid square map - A pdf file of US grid square map by Icom america

QSO Map - Write down grid squares of your qsos and this nice tool will create a map with all QTH linked to your home QTH.

Repeaters database on Google Maps - Interesting google map and repeater database integration that let you search, display and also edit repeaters and relative coverage using google maps api by K5EHX

The Tube Center - Supplying over 2000 different vacuum tube types, valves, grid caps, sockets and capacitors. It is easy for Antique collectors, Ham radio operators, audio enthusiasts, broadcast enthusiasts and amateur radio hobbyists to buy, sell and trade vacuum tubes, electron tubes, audio tubes, valves, grid caps, sockets and capacitors

Gpredict - Gpredict is a real-time satellite tracking and orbit prediction application. It can track an unlimited number of satellites and display their position and other data in lists, tables, maps, and polar plots.

Homebrewing a tube-type HF amp. - This article discuss the use and construction of a grounded-grid, triode type HF amplifiers

Homebrew HF Amp with 3CX3000F7 - Grounded grid triode HF linear amplifier with pictures and schematics diagrams by W2DTC. The amp design was for 160 80 40 and 20 meters

Ameritron AL-1200 to gs35b Conversion - The Ameritron AL-1200 Amplifier is in current production. In its factory configuration it uses a single 3CX1200A7 (triode) tube, grounded grid configuration. Re-tubing the AL-1200 with a GS-35b with success.

W2DTC Homebew RF Amplifier - Grounded grid, Cathode driven, 3CX3000F7 Triodes

DTMF Squelch and remote control decoder - This article describes how to build a general purpose DTMF decoder with a low-price chip from MITEL