air filter

G3SEK's Amateur Radio Technical Notebook - A lot of good informations concerning antennas, filters, moonbounce, and circuitry data.

Radio Gateway by IKXHT - "The project ""Internet on the Air!"" Radio Gateway project"

Workman Electronics - Amateur radio accessories, power supplies, tvi filters, speakers, microphones, swr meters, preamplifiers, switches, cable and connectors,

Array Solutions - WX0B - Stacking and phasing HF and 6m arrays antenna switches and contesting devices. Custom low band antenna arrays, bandpass filters,commercial/Mil STd filters,microwave components, commercial broadcast filters.

Aircom - Antennas, Adapters, Attenuators, Tuners and more

WIMO - All kinds of antennas, RF connectors, radio transceivers and accessories like power supplies, morse keys, lowpass filters and so on.

Dunestar Systems - Manufacturer of single band and multiband transceiver bandpass filters for HF. High pass filters, two radoi headphones mix and switch, 6 meter portable antenna, antenna remote switching and steering.

Davis RF - provide electronic and electrical wire, cable, RF connectors, DSP audio filters, rope, non-conductive guy cables for aerial or tower support; plus sundry aerial related parts

Timeware tech. - Amateur Radio Products, Noise Reduction Filters, Data Controllers, deviation meter, Software, DSP-RTTY

INRAD International Radio - Supplier of custom designed, high performance quartz crystal filters for communications receivers and transceivers, for Yaesu Icom Kenwood and Collins radios

Heros Technology Ltd - HF Radio Preselectors,BCB filters,Low Pass filters,Band Pass filter

Bencher Inc. - Paddles, Keys, Filters, Antennas

RMS international - RMS International, italian distributor of Alcava batteries and power supply, since 1975 manufacture power amplifiers, watt meters, antenna tuners, TVI filters and other accessories for hams and cb radio

AEA - AEA Technology Inc. is a pioneer and leading manufacturer of RF and cable test equipment for the wireless, Telco, CATV, NMR & MRI, RFID, telemetry, aviation, commercial, military, and two-way radio industries. Produces SWR Meters, Pre Amplifiers, filters, power meters and antenna testing products

Vectronics - Antennas, Filters, accessories, wattmeters, tuners and amplifiers.

Novel filter for sat working - Elimiate QRM when working with satellite antennas

Centre de prevision de Meudon - Centre de prevision de activite solaire et geomagnetique de Paris-Meudon

The CB EPROM Data Book - Fundamentals of Eprom operation - internal storage, Hexadecimal, Conversion table and much more

Atlantic Ham Radio Ltd.  ^pop - Canada's premier amateur radio, shortwave radio, scanner, CB, marine and aircraft radio store. A complete line of acessories is also available along with full service and repair facilities.

Electronic Service Pros  ^pop - HAM/Broadcast, Modifications & Repair, D-104 mods, TS-830 TS-530 mods

Trans World Radio - Trans World Radio has been a part of Guam since 1975 when our MW (AM) station (KTWG) first took to the airwaves. Our Shortwave station (KTWR) has been on the air continuously since 1977.

CwGet  ^{updated  pop} Priority listing - A program to decode morse code (CW) via sound card to text. It can work as narrow-band sound DSP-filter also. No additional hardware required — you need only receiver and computer with a sound card. Can integrate with AALog logger.

Fil's Repair page - Series of comprehensive repair guides for consumer electronics equipment and other household devices

K1TTT Technical Reference Priority listing - Technical reference about Accessories, Amplifiers, Antennas, Cable and Connectors, Filters, Geography, Grounding, Gunk, Matching Networks, Projects, Propagation Info Radios, RFI/EMI, Rotors, Station Setup, Towers.

Bearcat 210 Scanner Conversion for Weather Satellite - Modification to the Bearcat 210 scanner for reception of 137 Mhz FM is a fairly simple process.