high

560 links - and 3 categories

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
[ Hits: 3761 | Votes: 2 | Rating: 9 ]

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
[ Hits: 1017 | Votes: 1 | Rating: 4 ]
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.
[ Hits: 1929 | Votes: 4 | Rating: 7 ]

Helical Antennas - The Helical antenna description, a simple way of obtaining high-gain and a broad band of frequency characteristics
[ Hits: 1343 | Votes: 1 | Rating: 10 ]

Rhombic Antennas and Inverted V - The rhombic antenna is often claimed to be an exceptionally good antenna with very high gain. Modelling rhombic antennas
[ Hits: 1271 | Votes: 1 | Rating: 4 ]

Dual Band Flower Pot antenna - Experimental Dual Band High Gain Flower Pot Antenna
[ Hits: 823 | Votes: 2 | Rating: 4.5 ]

TubeRadioDoc - 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
[ Hits: 491 | Votes: 2 | Rating: 9 ]

GW4LFO Highfields Amateur Radio Club - Ham Radio Club in Wales UK
[ Hits: 372 | Votes: 2 | Rating: 9 ]

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.
[ Hits: 555 | Votes: 1 | Rating: 9 ]

Pro Antennas - Specialist UK manufacturer of high performance compact HF antennas
[ Hits: 330 | Votes: 0 | Rating: 0 ]

NP Technologies Inc - Design, develop, test and manufacture a wide range of Amplifier products including highly linear class A Broad Band, Cell Band, Pulse, AM & FM broadcast and Military VHF
[ Hits: 368 | Votes: 0 | Rating: 0 ]

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
[ Hits: 369 | Votes: 0 | Rating: 0 ]

Cross Country Wireless SDR Receiver - 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.
[ Hits: 3039 | Votes: 64 | Rating: 8.41 ]

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.
[ Hits: 414 | Votes: 0 | Rating: 0 ]

Iambic Keying - Iambic Keying, Debunking the Myth by Marshall G. Emm, N1FN. A keying system controls transmitter activation, ranging from basic switches to electronic keyers that generate Morse code based on paddle input. Iambic keyers, introduced in the late 1950s, respond to simultaneous paddle closures with alternating dots and dashes. Despite touted efficiency, actual benefits are modest, offering about a 5% improvement in keystrokes, diminishing at higher speeds. Iambic keying's practical value is limited and may restrict sending speeds.
[ Hits: 627 | Votes: 0 | Rating: 0 ]

VOACAP Online - Online professional-grade high-frequency (3-30 MHz) propagation predictions
[ Hits: 1837 | Votes: 3 | Rating: 7 ]

Tubeworld - Source for high quality new old stock vacuum tubes
[ Hits: 390 | Votes: 0 | Rating: 0 ]

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
[ Hits: 3233 | Votes: 8 | Rating: 7.75 ]

JT65-HF by W6CQZ - Download JT65-HF Amateur Radio software for reception/transmission of JT65A protocol with an emphasis upon its usage in the High Frequency Amateur Bands. This is the W6CQZ version not developed anymore.
[ Hits: 10394 | Votes: 23 | Rating: 6.49 ]