high voltage

10 elements 70MHz Low Noise LFA Priority listing - A 10 element 4M LFA Yagi. Flat SWR across the band, easy build with no matching to install. No power limit high gain.

Low-Noise LFA Yagi for 70MHz Priority listing - Super flat SWR from this high gain easy-build Yagi. Great for home or fild day.

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

3 elements 50MHz LFA Yagi antenna Priority listing - A Very compact, high gain LFA Yagi for 50MHz a good stacker and a must look!!

9 elements 50MHz 12.5Ohm Yagi - A DX antenna for Serious hams. High gain, super flat SWR. The ultimate 9el 50MHz Yagi

5 elements 50MHz 28Ohm OWL Priority listing - a very compact, high gain 5 elements Yagi for 50MHz

Tri-Mode Buffer Amplifier Box - The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.

Eggbeater II Omni LEO Antennas - Presented here is a high-performance, circularly polarized omni-directional antenna that is easy to build, easy to tune, inexpensive, and will work all the mode J Low Earth Orbit (LEO) satellites

A High Gain Mode J/B Yagi Antenna - A 70 cm and 2 m arrow-like antenna by DF8GH

X-QUAD Antennas - The X-Quad is an improved development of the well-known multi-element quad. Switchable polarization, high gain 2 m and 70 cm 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.

Long Range Wi-fi Dish Antenna - Build parabolic WLAN antenna adapted from a small satellite dish. It provides high gain and long range connections.

Delta Sigma, Inc. - High Power RF Amplifiers by Delta Sigma, Inc

ASC Signal - Global manufacturer of Satellite Earth Station, Air Traffic Control Radar Antenna and High Frequency Antenna products for broadcast, government and enterprise satellite communication applications.

Martek Power - Martek Power designs and manufactures a wide of high performance power supplies for various industries. Power supplies AC-DC, DC-AC inverters, DC-DC, EMI Filters

FT-817 DC Circuit Protection - A schematic for a DX circuit protection for the Yaesu FT-817, provides protection from the external power supply overvoltage by DL2LTO in german

MrSolar.com - Features the highest quality, brand-name solar panels in the market, including BP, GE, SolarWorld, Sharp.

80-10m Linear Amplifier - High-power 3-500 HF linear amplifier by Don Pinnock G3HVA

High power amplifiers by pass relays  ^updated - These relays are only to be used for output power who exceeds conventional antenna relays specifications.

6L6 Transmitter - 40 meters band 5 watts transmitter, uses a 6L6 with a 6X5 rectifier and a 0D3 voltage regulator tube on the screen.

OZ3QY CDG2000 Transceiver - The CDG2000 is a high performance HF transceiver developed by G3KBB, G3OCQ and G3SBI. They have managed to design a high end transceiver that can compete with the most expensive ones on the market

I0SKK CDG2000 transceiver - CDG2000 is a superb transceiver, mainly designed as a high performance receiver by three G-land OM Colin Horrabin G3SBI; Dave Roberts G8KBB and George Faer G3OGQ.

Home-Brew Regenerative Receiver - Home-Brew Regenerative Receiver and experiments with low voltage operation.

Regenrative Receiver Design - N1TEV high performace regenerative receiver design

A 2 tube regenerative receiver - A low voltage 2 tube regenerative receiver