dc power supply

Anthony Welsh Ltd. - A great source for hard to find HI END & power tubes & sockets, various capacitors, vacuum relays, various keys and paddles.

SVSRG Radcom - Information and data for all aspects of radio comms and a link to the SVSRG home page

Fieldcomm association - The FieldComm Association is a small group of individuals in the central Virginia area interested in communications

Knightsqrss Info Page - This mailing list is devoted to low power, narrowband experimenting (QRSS CW, DFCW, etc). You are invited to share your ideas with the group, announce on-the-air schedules, etc by posting messages

Empower RF Systems - We offer a large selection of standard and custom High Power RF and Microwave amplifiers for broadband, general communication, matched band, and personal communication markets.

Nemal Electronics - Manufacturer of standard and custom electronic cable, connectors, cable assemblies, and patch panels for broadcast, audio, video, RF, microwave, and electronic control applications.

WaveNode Precision Station Monitoring - The WaveNode WN-1 is a precision, full-featured Amateur Radio Station Monitoring System which now includes Audio Announcing for RF power, SWR, and DC monitoring using HF and UHF remote sensors.

NAVTEX - The NAVTEX system is used for the automatic broadcast of localised Maritime Safety Information (MSI) using Radio Telex (also known as Narrow Band Direct Printing, or NBDP).

ESR Magazine - electronics-science-radio - ESR is a magazine for Amateur Radio, CB, Broadcast, SWL and Scanning. Aim is to promote all hobby uses of radio, and to encourage students to follow a career in electronics and radio.

D&L Antenna Supply Co. - Antenna accessories and related products

M.E.B.A. Electronics - Distributor of electronic's, also carry astatic, cherokee, cobra, dosy, firestik, solarcon,CB radios,10 meter radio's, antennas, microphones, power supplies, echo boards, expanders, meters and CB accessories along with Mobile audio/video products.

Funktechnik Grenz - Online shop for ham radio equipment. Yaesu, Kenwood, Icom, Alinco, Diamond, Power supplies, Antennas, Rotators with world-wide shipping.

ATSI Tubes for Broadcast and Transmitting - Matched Power Broadcast tubes 813,81A,572B,4-400A,3-500,12BY7. etc. Great prices fast delivery.

The Quack Shack CB Shop - CB Radio and Ham Radio outlet. Accessories, amplifiers, mounting brackets, power supplies, GMRS, FRS, scanners, microphones,and more

Scanner Master Police Scanners - Police scanners by Uniden Bearcat Scanners, port radio scanners antennas parts or listen to live online emergency police broadcasts with radio frequency codes by Scanner Master

Current DRM schedule - Permanently updated list of DRM broadcasts on AM bands

DSWCI - The Danish Shortwave Club International - "The DSWCI was founded 1956 and has members in 36 countries all over the world. The member bulletin ""Shortwavenews"" is published regularly in english."

Radio Explorer - Graphic viewer for shortwave broadcasting and programming schedules. Supports viewing schedules in an expanding table and on a 24-hour Gantt chart using the local time and the UTC time display modes. Runs on multiple platforms.

PSK31 Deluxe  ^pop - PSK31 Deluxe is a PSK31 and PSK63 program for novices and power users. It has been replaced by Digital Master 780 and is now a legacy product. The last version of PSK31 Deluxe was shipped with the HRD 4.0 SP4 kit and is no more availabe and supported.

GNPDB - The program GNPDB is intended to display the ILGRadio broadcast database. Requires MS Windows 95,98,2000,XP.

A.M. tutorial - This tutorial is designed to help explain some of the concepts involved in RF power measurement for amplitute modulated signals.

Transistor Specifications - Transistor Specifications, ``RF Power Mosfets ¹ HF VHF transistors

Transofrmer tutorial - Roll Your Own Power-Transformers

Crystal Radios at crystalradio.org.uk - Shortwave and broadcast band listening using crystal (passive) radio.

SWR bridge - This SWR bridge works by sampling the amount of power flowing in each direction along the aerial feeder.