Long Wire Antenna for portable operations, ICOM IC-7610 review by PD9Z, TelTad Online Shop, ADALM-PLUTO SDR, DX HOLIDAY

Operating Modes/Radio Direction Finding
About Amateur Radio Direction Finding events, sprint and Fox-Oring spcialities. Sprints are intended to bring ARDF nearer to the public and to attract potential sponsors and new athletes to ARDF. Foxoring encourages ARDF enthusiasts to improve their orienteering skills.

Antennas/30M
Homebrew 30 meter full quarter wave vertical antenna.

IC-R20 by Icom. Wideband Receiver Professional radioreceiver, allow double receiver, from HF to Microwave, digital recorde, DTCS, Memories and 11 hours countinuous reception.

Technical Reference/Preamplifiers
The prototype for this amplifier was originally designed for 70cm and was used on the 2004 3B9C Dx-pedition to Rodriguez Island for satellite and EME. It had a noise figure of 0.49dB with an associated gain of 20dB.

Manufacturers/Filters
Microwave Filter Company is a leader in the design, development and manufacture of high quality passive electronic filter products in the 5 Hz to 50 GHz frequency spectrum.

Antennas/Towers
Article based on ROHN engineering specification that will guide on proper guying heights and guy lengths when guying ham radio antenna masts. It will help you determine ahead of time the proper length of guy wires and the distance from the base of the mast to the anchor points

Manufacturers/Towers and Accessories
Specialist for vertically adjustable supporting frameworks including telescopic masts and telescopic towers for ham radio systems, lighting systems, measurement techniques, observation systems. Located in Gnaschwitz Germany

Antennas/Baluns
A page describing how to home made a custom 9:1 balun for a common portable wire antenna. The author suggest to use 4C65 or FT140-61 toroids instead of the common Amidon T200-2

Antennas/Towers
A multiple page article about assembling the antenna system, this section includes informations on constructing of the concrete tower base, starting from setting up correctly the foundations in relation to the antenna height.

DX Resources/QSLing/QSL Galleries
Collection of QSL cards from more of 200 dxcc countries confirmed in SSB and CW

Isotron Antennas, Maria Maluca by DL4AC, G3TSO Mobile Antenna Page, Flag Database - Miniflags by Mooney, Microwave Transverters Projects

Antennas/Dipole
An 20 30 40 meters trapped dipole antenna plan for sota and portable operations.

Antennas/Theory
A collection of antenna projects by W4RNL L.B. Cebik collected in a single link page by ON5AU. Includes ARRL QST, Modeling and Understanding Small Beams and books

Antennas/Dipole
As the name suggests, it is simply a dipole with the tips folded towards each other. In this case, a full-wave dipole. The span of a standard folded dipole is aprox 0,5 lambda

Ham Radio/Blogs/USA
Web site and blog that reviews equipment, goes over safety, and display projects being built. Includes Yaesu FT-891 and Ameritron RCS-10 Review, a 555 Morse Code Practice Oscillator, and and arduino based Morse Code Practice Oscillator