load coil

Vertical for 80 or 160 meters - KE4UYP project for a top fed 1/4 wave lenght linear loaded vertical for 80m or 160m

8el 50Mhz / 70Mhz Dualband Yagi - Only just over 6 foot long, a compact 8 element dualband Yagi for 6 and 4 meters band. No traps or coils, no matching required. Simple to build by G0KSC

Dual Band Yagi 28Mhz and 50Mhz Priority listing - NO Traps or coils, NO matching required. Direct 50 Ohm feed. Easy to build and nothing else like it! Enjoy 50/28 with one feedline to a dual band high gain Yagi by G0KSC

Antenna Loading Coil Calculation  ^updated - The calculation refers to either a loaded 1/4 wave or a loaded dipole,

Coil Designer - Mk 2 - This page lets you do calculations for single layer air cored coils using the solenoid formula

Coiled Choke Balun for HF - A very practical Balun for HF aerial work is the choke type. It reduces RFI to and from the feeder & at next to no cost or loss.

Inductor operation - Understanding current in loading coils

Homebrewing Coils - Homebrewing antennas, homebrewing your own Coils ny K0BG

Mobile Portable Whip Antenna - A simple base loaded quarter wave vertical, which can be used on a car or portable by G3YCC

Multiband HF Antenna - This article explores the performance of an unloaded vertical as a multi-band HF antenna.

13m high elevated vertical - This article explores the performance of an unloaded elevated vertical, base matching and feed line as a multi-band HF antenna system.

Unloaded vertical as a multi-band HF antenna - Performance of an unloaded ground mounted vertical as a multi-band HF antenna.

HF BandPlan by RAC - Canadian HF Bandplan by RAC in pdf format

CWS Coil Winding Specialist - Manufacturer of transformers, inductors coils and chokes. Custom winding, EMI / RFI Filters, Antenna Windings on ferrite rod, Antenna Winding on phenolic. Any antenna coil designs.

C&M Corporation - C&M Corporation is a leading manufacturer for custom cable, cable assemblies and coil cord.

QRP 1:1 Current-type Balun for Portable Use - A ferrite-loaded coaxial RF choke which just happens to yield the same result as a 1:1 current balun

RSGB FT-857 Review - RadCom Jun 2003 review of the Yaesu FT-857

SHOUTcast DNAS - Broadcasting your radio from your home using the SHOUTcast Radio DNAS Application

Sunstone PCB Design Software - Sunstone.com PCB123 PCB download software. Review Sunstone quality pcb design software. Free PCB software download for all of your business needs.

ADIF2CABR - Freeware Adif to cabrillo converter by SP7DQR. Windows ADIF 2 Cabrillo log format converter application let you translate you contest log book from the standard ADIF format to the Cabrillo format.

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

Capacitor kVAr calculator - Online calculator to determine the Capacitor kVAr required to improve the power factor from cos 01 to cos 02 with your present kW load

QRP Power Meter and Dummy Load - In this article the schematic is of AA5TB QRP power meter and dummy (50 Ohm) load combination

Modify ICOM IC-735 for DRM - Modify the ICOM IC-735 HF-Transceiver for DRM reception

13 cm transverter - DF5QZ transverter project for 13 cm band