cheap chi

21 mhz half wave GP Antenna  ^updated - 21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade

Dual Band Vertical On Autopilot - A good 20 & 40 meter dual band vertical using a novel tuning method that provides automatic band switching.

Morgain Antenna for 40/80 - Simple and cheap antenna for 40/80 meter band

End fed halfwave antenna and matching unit - One is an EFHWA for 20-40 meters, and the other is a matching unit for the antenna by n0lx

G5RV vs. Ground Plane on 80M - Comparison tests by WF7T of a G5RV antenna vs a GP antenna on 80 meters band

K-FACTOR Table & Chart - Determine the K-Factor used as a multiplier when constructing half-wave antennas.

Towertalk Archives - A tower related mailing list

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.

Collins Museum - Managed by WA3KEY Featuring the Collins Radio Advertisement Archive

Kachina Amateur Radio Club - We are an Amateur Radio Club made up of members from communities in and around Show Low, Arizona. The Kachina ARC is a non-profit organization that focuses on radio communications and education for public service.

CE2GVM Radio Club Gaviotas Chile - Radio Club Gaviotas, Vina del Mar, Region Valparaiso, Chile, CE2GVM, radioaficionados de Vina del Mar, Diploma RC Gaviotas, telecomunicaciones, licencia, radioaficionados CE, radioaficionados XQ, Novicio, General, Superior, CW, DX, radio clubes

The VK2SG-RTTY Archives - Archive of messages of the vk2sg rtty mailing list

Scanner Chile - Scanner Chile is a System online where you can listen to the Departments of Firemen of the Metropolitan Region Chile

Peet Bros Company - Manufacturer of advanced electronic systems to measure such weather data as: wind speed, wind direction, wind chill, pressure, humidity, rainfall, and dew point.

NETCERTUS ampsequencer - Advanced microprocessor driven control board specifically designed to buffer CW key signals while switching the amplifier to transmission, it can also be used to provide proper TX delay timing for RTTY.

Bucktown Visas & Passports, Inc. - Bucktown Visas and Passports, Inc. processes all of your international documents in as little as 24-48 hours from Chicago, Illinois.

QSK for the TL-922 and SB-220 mods - Beautifully constructed amplifiers. Unfortunately, are not suited for high speed T-R switching, a necessary attribute for operating AMTOR, QSK-CW, or SSB-VOX modes.

BEIJING ELJVT - Sell the China made electron tubes over a long period of time, the vacuum tubes/electron valves/Power tubes/Audio Tubes/Thyratrons/Magnetrons and accessories, the tube sockets, the vacuum capacitors, high voltage ceramic capacitors, aluminum electrolytic capacitor.

RevLoad - This graphics-intensive program reveals the load on the output of a matching-network, based on measurements of the components in that network. Adjust the network (tuner) for a flat input, measure or look up the network component values and you will immmediately see the R and jX values of the load on the network, presented as both a schematic with the component values and as a Smith Chart normalized to the specified system impedance.

Morse Code Beacon Keyer - This circuit stores a single morse code message as bits in an EPROM chip, the message is sent to a relay which can key a CW transmitter.

DigChip IC database - Provider of electronic components documentation. Offer a reliable tool to find semiconductors components technical information like parts, datasheets, cross reference, obsolete and new circuits.

A cheap S Meter - A low-level voltage meter and could even be used for audio purposes.

Easy Morse Code Keyer Circuit - based on the famous Curtis family of morse keyer chips and has a proven record of dependability.

RFI - Intermodulation - Getting squeaks and squawks from your H-T? Are pagers crunching your mobile rig's front end? Here's how intermod happens--and how to fight back!

Noise Sources - Computers, TV's, and Switching Systems can cause noises to your receiver