high voltage

G3YXM Small Loop - This simple antenna is capable of remarkable results on 160, 80 and 40 metres. Forming a triangle from around 50 feet of satellite TV coaxial cable, the top of the triangle can be as low as 15 feet, and the lower side just high enough to prevent a passer by hanging themselves

3 Elements 40m full size U Antenna - 40 m three elements U antenna at 25m hight.

High Gain Yagis for 432 MHz - DJ9BV dubus article on two different type of high gain antennas for 432 MHz.

Sleeve Baluns - Sleeve baluns are normally used at VHF and higher. As a general rule, they are not practical at HF. The balun can be inverted and used as a skirt to form part of the antenna element

Magnetic Long Wire UnUn 9:1 - An impedance transformer (9:1) to feed a high impedance long wire (~450 ohm), down to a 50 ohm unbalanced coaxial input.

1:4 Current Balun - This project is intended to aid in tuning a balanced antenna or feedline that has a high impedance 100-600 ohms by N5ESE

Dual Band Flower Pot antenna - Experimental Dual Band High Gain Flower Pot Antenna

TubeRadioDoc Priority listing - Vintage Tube Radio's from Germany for sale. High class restorations for all valve radios offered. Radio Brands like Saba, NordMende, Majestic, Grundig, Zenith, Philco and more. TubeRadioDoc Vintage Audio Store

Burnham Beeches Radio Club - The Burnham Beeches Radio Club. For armateur radio enthusiasts from Burnham Beeches, Slough, High Wycombe, Maidenhead, Beaconsfield and surrounding areas. We have club nights and activity on all bands as well as DX picnics, ARDF and contest events.

GW4LFO Highfields Amateur Radio Club - Ham Radio Club in Wales UK

Appalachian Contesters Priority listing - Appalalachian Contesters - W4APP THE High Country's amateur radio contesting club

HIDARG High desert amateur radio group - High desert amateur radio group, amateur radio operators who live on the Oregon high desert plain that extends from the Cascade Mountains east into Idaho and south to California.

RF Power Amplifiers - RF Power develope, produce and sell high quality solid state RF Power linear amplifiers

Antenna Engineering - Antenna Engineering specialise in producing a range of high quality aluminium HF verticals ranging from mono band single element verticals to multi element phased arrays.

Pro Antennas - Specialist UK manufacturer of high performance compact HF antennas

Innovantennas - Manufacturer of innovative and high performance antenna solutions, yagi antennas for HF VHF and UHF

PRO-COMM INC - High power, UHF, L-band, S-band, C-band, microwave frequency amplifier and oscillator devices, pulsed, CW, fixed-tuned, or tunable devices in the range of 600 MHz to 2000 MHz

Cross Country Wireless SDR Receiver  ^updated - SDR Receiver a compact high performance HF software defined radio receiver designed to be used in fixed or portable stations. Version 2 of the receiver is now available. It now has an RF pre-amplifier using a power MOSFET and other revisions to improve it's performance both as a stand alone receiver and as an IF panadaptor with HF and VHF transceivers.

California Tube Laboratory - CTL designs and manufactures a wide range of high-power pulse and CW magnetrons, and provides cost-effective magnetron rebuild services for commercial, industrial and defense users.

Introduction to Digital Modes - Wireless Society of Southern Maine, Digital Modes Page, introduction to amateur radio digital modes, including FLDIGI, PSK31, RTTY, high speed CW, Slow Scan Television, HF Weather Fax, WeFAX, MFSK16, OLIVIA, G-TOR, AMTOR, MT63, Digital SSTV, Frequency Key Shifting, and more

Ham4Less - supply a full line of the highest quality amateur radio equipment availalble. Antennas, coax cables and switches, baluns, power poles

Tubeworld - Source for high quality new old stock vacuum tubes

APRSISCE/32 - APRSISCE/32 is an Automatic Packet Reporting System (APRS) program, primarily intended for Windows and Windows Mobile (CE), although it will run on Linux and Mac OS under wine. Offer enhanced messaging, announcement support via ANSRVR, and QRU for object query support, can run as a highly configurable Digipeater

Fuses - About Fusues, current and voltage rating, type of fuses

CW without key clicks - High speed telegraphy without key clicks by SM5BSZ