alternative power

The Austin QRP Club - The A QRP Club is a small group of Amateur Radio enthusiasts who enjoy building, operating and (mostly) talking about Low Power radio communications, equipment and systems.

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

Haredata Electronics - Haredata Electronics is your one stop shop for Power Supplies, Chargers, Battery Packs & Accessories. Power Supplies Chargers, Battery Packs , Power Supply Accessories , Haredata Electronics Limited,

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

Knightlites QRP Club - The KnightLites QRP Association is a world wide fellowship of low power (QRP) amateur radio communications enthusiasts founded in 1996, and is coordinated through the efforts of a small group of radio amateurs located in the Research Triangle region of North Carolina in the United States.

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

A 2.3GHz to 432MHz receiver converter - Receiver converter that can be plugged to the backside of the Yaesu FT-817 battery powered portable transceiver

EnerStore - EnerStore, the place for your alternative energy needs

IDSP - IDSP is an app for IPHONE and IPOD Touch. Made by 2 powerful filters, a band pass and a band stop with adjustable bandwidth. Filters are butterworth 4 and 8 poles, sample rate at 44,100 32 bit. Cancel every noise and hear only your qso.

Homebrew 700 Watt Wind turbine - Home made a wind turbine for your portable operations

7 Watt HF Amplifier - An RF power amplifier, providing 7 Watts output in HF bands, schematic by ON6MU

Broadband Power Amplifier - A MRF141G 3-175MHz Broadband Power Amplifier DL4MEA 02/1998

400 W RF Power amplifier for 144 MHz - G4DCV's 144MHz amplifier with a pair of GI-7b Russian triodes

2m and 6m Power Amp - Duoband PA for 6m and 2m by T92T abd YU1AW schematic

G3TXQ Milliwatt meter - Meter capable of accurately measuring low levels of RF power

Digital Wattmeter - 300nW to 30W - The digital wattmeter project was created for the purpose of measuring power in the range of 300nw to 30w.

KD1JV Digital SWR / Power Meter - This small, light weight digital SWR and power meter uses an Atmel AVR Butterfly demo board and a Stockton type directional coupler.

DL4MEA Wattmeter - The DL4MEA Power Meter

Portable RF Sniffer and Power Meter - Whether we are tuning up homebrew equipment, checking antenna VSWR, adjusting a linear amplifier, or just monitoring output power during a contest, almost all aspects of ham operation can use a power meter. Paul Wade W1GHZ

Astron Power Supplies Mods - Technical and modification information on Astron Power Supplies compiled from a number of different sources by Mike Morris WA6ILQ

Power supplies with UA78 - 13,8 v / 1 A power supplies using the UA78 series by ON6MU

2A Power Supply - Schematic of a regulated 0-24v 2A Power Supply

40A-13.8V Switching Power Supply - Ever want a really big power supply that can handle all your 12v needs around the shack ?

QRP SWR Meter - SWR meter for low power output measurements, dedicated to QRP operations

Homebrew C-L-C QRP Antenna Tuner - This is a C-L-C type tuner with a reflected power indicator. Tuning is done for minimum reflected power.