fir filter

Your First 160-Meter Antenna - Notes on building a basic wire vertical or horizontal antenna for 160 meters band by L. B. Cebik, W4RNL

The Crossed-Field Antenna - Please be aware this article introduces a completely new concept in antenna theory. In fact, this is considered the most important development relative to antennas in this century. It is so pervasive that a series of articles are required to cover the concept and its applications to the depth and extent it deserves. This is the first publication about the Crossed-Field Antenna

N2CX on End-Fed Halfwave Antennas - This original N2CX article was first published in the 72 newsletter back in 1997 or 1998.

YO4KRB - Radio club - Radioclubul Radu Bratu - YO4KRB Is the first private Ham Radio Club in Constanta City, Romania KN44HE

Boca Raton Amateur Radio Association - The home page of the boca raton amateur radio association. we meet on every first tuesday of the month and operate the 145.290 repeater. Palm Beach County, Florida.

W4MLB Platinum Coast Amateur Radio Society - Platinum coast amateur radio society (pcars) w4mlb - melbourne florida, pcars provides hf, vhf, and uhf communications for any police fire and rescue emergency

W1AF - Harvard Wireless Club - Harvard wireless club, harvard's amateur radio or ham radio club. founded in 1909. welcome to harvard affiliates, alumni, prospective students, and their parents, as well recent contacts. information about club getting started radio. confirming contacts qsl. flea market. history.

WPI Wireless Association - The Worcester Polytechnic Institute Wireless Association has its roots in the beginnings of Amateur Radio. The group was first founded in October of 1909, by Oliver B. Jacobs and a group of 40 other men.

Firebird amateur radio club - Employees and retirees of General Motors Corporation

Amateur Radio Association of Bloomington - The Amateur radio Association of Bloomington (ARAB) holds its meeting on the first Tuesday of each month

Shore Points Amateur Radio Club - Our Club Repeater System serves the Atlantic City Area on three Amatuer Bands

Cameljoe's Police Scanners - Collection of links to listen to police, fire and airport scanners online.

Amateur Radio Techniques - RF Filters an adjustable j-pole antenna manufacturer based in greece

Trilithic - Broadband instruments, R and microwave components and filters, field analyzers, spectrum analyzers

Getting started on RTTY - A complete guide from the station setup, rtty software customization, tips on tuning rtty signals and setting the proper audio level and filters by Andrew G8GNI M5AEX

FT-1000D Why DX in Stereo - Yaesu's classic, top of the line HF transceiver for contesters and DXers is probably the only ham dual-receiver radio that does true diversity reception

Toroid cross reference - Construction articles in magazines and books often use part numbers of firms no longer in business or whose parts are hard to find. Here you can locate the palomar toroids equivalent

Diplexer design notes - Standard diplexer design is based on singly-terminated Butterworth filters.

YCCC 6 Band Receive Bandpass filter - This is a 6 band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands.

The NVARC Ugly ¯ Filter Project - Project to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity

Narrow Band-Pass filter for HF - Band-pass filters can be critical components in competitive stations. This setup may help put your station on the map.

Clean Up Your Signals with Band-Pass Filters - These inexpensive, easily built filters can be the buffer you need between the signals you want to hear and send and those you don’t!

Clean Up Your Signals with Band-Pass Filters part 2 - Part 2—You’re now much closer to saying goodbye to your unwanted signal problems!

Band-Pass Filters for HF Transceivers - Do your multiple-transmitter field day or contest efforts suffer from intrastation interference ?

K2TR Coax Stub Filters - Multi transmitter filters