voltage converter

4 meter antenna conversion - A Siverrot antenna converter for 70 MHz operations

Broadband Baluns - Voltage baluns and choke (or current) baluns.

TG Electronics - Specialize in the manufacturing and sales of DC Boosters, Regulators, Converters and Accessories

AO-40 VHF Converter - 144 MHZ to 28 MHZ 2nd Down-Converter for AO-40 Sat

Changing Filament to Kenwood TL-922 - Mod to reduce filament voltage by using thinner and longer wires from filament transformer

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

CAT cable schematic for FT 817 857 897 - To connect up your FT-817/857/897 to a PC you have a number of options. For the serial connection you can go ahead and obtain a CT-62 from YAESU. Alternatively you can make up your box with a level converter and cable using schematic in this page

GridLocW - GridLocW a Lat/Long to Maidenhead converter for Windows with optional GPS support

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.

Yea Cabrillo2Adif Converter - Cabrillo2Adif A software for converting the radio logs from Cabrillo to Adif log format (for Mac OS X)

Excel ADIF Converter - Use this excel spreadsheet and use it to input your old manual logbook data and have it converted to the ADIF format

ADIFLookup - This utility was written as an interface between N1MMLogger and Logger32. Freeware windows Log Converter.

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.

Battery voltage booster - A battery voltage booster project with pictures and schematic by KD7W

A Precision Voltage Reference - A project by Don Wilhelm W3FPR

DB Watts EIRP Calculator - Online calculator, to convert dbWatts to Watts and vice-versa, or ERP and EIRP by G4URH

Fuses - About Fusues, current and voltage rating, type of fuses

Voltage protector/Fuse Assembly for 100-watt transceivers - A compact voltage protector/fuse assembly for 100-watt transceivers by AD5X

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

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

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

Crystal tester - Crystal tester project, crystals are used to control the operating frequency of transmitters, and it is used in radio frequency converters, oscillators, filters for cw, ssb and many other applications.

2M to 10M receive converter - EI9GQ 144 to 28 MHz converter