high voltage

Ionic Liquid Antenna - Ionic Fluid Antenna By Brian Perrett, MW0GKX, from original articles by David Hatch, N9ZRT.

10m Band 2 Element Loop - 2 elements horizontal high gain loop for 10 meter band

Zippiro antenna for 40 Meters - Very compact and high efficiency antenna ,very low radiation angle even at low height.

10el 50MHz Low Noise LFA Yagi - A high gain LFA 10 element LFA Yagi with super clean pattern and flat SWR no matching required so easy to build.

6 elements LFA antenna for 6 meters - A high-gain 6 element LFA Yagi with a 7.3 metre boom for 50MHz

VSWR Loss Calculator - This calculator is designed to give the efficiency loss of a given antenna, based on the input of VSWR (voltage standing wave ratio) and other subsequent factors

EME stackable 9el 144MHz LFA Yagi - High Gain Low Noise 9el 144MHZ LFA Yagi. Flat SWR and no matching required. Very low temperature see lowest Ta on VE7BQH list ofr this size!

Highfields Amateur Radio Club - Amateur radio club from Cardiff Wales UK

Indiana Area Live Scanner - Scanner Covers Analog & Digital Law Enforcement/Fire/EMS/EMA/Schools/Utilities/Municipal/Highway Maintenance & Forestry Communications In Perry & Spencer Counties In Indiana & Hancock County In Kentucky

HAM TV - Ham Radio TV Events, Communication & Electronics History Webcast With High Speed Internet And Windows Media Player

Megawave - MegaWave Corporation's goal is to provide services and products of the highest quality to its many customers in the areas of antenna design and development, and radiowave propagation.

Communication Coil - Communication Coil, Inc. designs and produces custom, high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids and Power Magnetics for communications

Taiyo Yuden - Ceramic capacitors, inductor ferrite products, high frequency dielectric components like chip antenna and filters.

TS50-High-Power-Mod - With that small modification you'll get a Trim-Pot and the TS-50 is able to run up to 180 W output by DK0WFC

SuperSmith - Program to mechanize Smith Chart operation This graphics-intensive program is a valuable transmission-line calculator for both advanced and beginning users. Based on the venerable and highly intuitive Smith chart, it provides high-accuracy computations without recourse to paper, compass or straightedge.

WinPic 2007 - Program bulk erases, reads, writes and verifies PIC10F, PIC12F and PIC18F families. PIC part number selection. Programmnig voltage selection. 2V to 5V/ 0.25V step. Firmware updating.

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

Simple beacon construction notes - Here is a simple, self-contained beacon which can run a few milliwatts or as much as a watt depending on choice of amplifier and supply voltage.

Fitting a PL259 to a coaxial cable. - Fitting a plug to thin, 6mm, coaxial cable will require a PL-259 either made for the small diameter cable

Bandpass and I.F. Filters - On this page a popcorn highpass filter, some inductors and their Q , double tuned bandpass filters and simple Cohn Crystal ladder IF filters are presented.

W3LPL Receiving Bandpass Filters - Project of receive only filters optimized for minimal loss and very high rejection of frequencies below 75% of the filter center frequency by K1TTT

High Pass Filters - Understand how high pass filters are done

Universal frequency counter & voltage meter - to be used with QRP transceivers

CDG2000 by OZ9FW - OZ9FW CDG2000 High-end transceiver homebrew project

High current power supply for rigs - High current universal supply for rigs, project article by VU3NSH