tape measur*

7elements 21MHz OWA Yagi - An Excellent 15M compact 7el OWA Yagi for the 21MHz band. SWR remains below 1.1:1 from 21-21.45MHz. Tapered elements in Metric and USA sizes

2 Meter Slim Jim antenna from Ordinary Wires - Slim Jim (J Integrated Match J-Pole) is probably the most easiest and powerful 2 meter antenna to build provided you have the exact measurement and material to build it.

70cm 2 x 11 elements Cubical Quad - A group of 2x11 elements all grounded quad antenna for portable operation on 70cm. Included detailed pictures and measurements.

HF Beam Calculator - Calculate the Measurements for a 2 or 3 ele Beam

The Dual-Ferrite-Bead 4:1 HF Balun - A pdf document about the dual ferrite bead 4:1 balun, some preliminary measurements

Mobile Loading Coil Measurements - 75m Mobile Texas Bugcatcher Loading Coil Measurements

Current Through a 75m Bugcatcher Loading Coil - About experiments and measurements on loading coils using net standing wave current

Coil measurement experiment - Comment on W5DXP 2011 coil measurement experiment

Coil Q Measurements - Coil Q Measurements - With a special focus on wet coils.

A Mini Primer on SWR Measurements - What Does a Low or High SWR Mean? Relation between SWR and antenna efficiency by WB6FRZ

Antenna current meter - How to measure antenna feed balanced lines currents

Measuring antenna gain - The gain of an antenna is measured in relation to the gain of another further specified antenna through a comparison measurement.

2M Programmable Fox-Or Transmitter - The 2 metre fox-or transmitter is a small low power transmitter which mounts in a small plasic pipe and runs off two AA batteries. The board measures just 12mm by 70mm.

Frequency Measurement with the FT-920 - KC5M frequency measurement with yaesu ft-920

Maldol HVU-8 antenna - Real life experience with the Maldol HVU-8 antenna by KI6YRD

QST Reviews Key Measurements Summary - QST Magazine Product Reviews - Key Measurements Summary - HF-Transceivers or Receivers. Compares Yaesu FTDX5000, Elecraft K3, Flex 5000 and Kenwood TS-590S

Sound Company Virginia - Sound System Alexandria, Baltimore, Maryland, Washington DC Priority listing - Sound company virginia provides audio equipments, audio tape recorder with the capability to directly record live spoken words with highest audio quality.

PTL Test Equipment - Your best source for new & reconditioned test and measurement electronics in USA

Measuring Zs in solid-state amplifier - Measuring the output impedance (Zs) of solid-state broadband HF amplifiers operating in class AB eham article by ZS6BIM

QLF Filter - Microprocessor based interface designed receives a signal from a Morse key, processes it, and re-transmits it to the radio. A microprocessor in the circuit is pre-programmed with a proprietary algorithm which makes a number of measurements and adjustments to the less percise human generated code.

Power and power measuring techniques - Article on how to measure power, what power is and the different ways of specifying power

An Accurate Power Meter For QRP Ops - A circuit using two junkbox transistors and a garden variety op-amp that will let you accurately measure your rig\'s flea power down to milliwatts.

SWR readings whats going on - N2GZ measuring antenna SWR and techniques

R.F. Current Meter - This R.F. current meter was developed to assist in measuring line currents in balance feed lines as used in the All Band HF Antenna.

Measuring SSB transmitter power - PEP RF output power measurement, and examples RF output power measurements