u301 fet preamplifier

Bravo Bravo DX Club - Intern. DX Radio Group has worldwide members, founded 1980 offers lifetime membership

Auxiliary Communications Service - State of california, governor's office of emergency services, ACS program. bulletins, newsletters, .ftp & .pdf, links & more on public safety auxiliary communications.

Three Rivers Radio Club - 10 meter SSB club, Free lifetime membership. We are in the St. louis area, but we also welcome hams from the whole USA.

Amateur Radio RF Safety Calculator - This is a main beam power density estimation program intended for use as part of a routine evaluation of RF safety compliance with FCC regulations.

ScanMuncie.com - ScanMuncie.com, Serving the City of Muncie and Delaware County, Indiana with Public Safety Radio Scanners and Online Interactive Forums Available 24 hours a day

Workman Electronics - Amateur radio accessories, power supplies, tvi filters, speakers, microphones, swr meters, preamplifiers, switches, cable and connectors,

KEPS Equipments for AO40 downlink - Complete receive system, downconverters, dishes, feeds and preamplifiers for AO40 satellite users

Mutek - Transverters, amplifiers and low noise preamplifiers

Nally radio towers - Radio towers with designs made specificaly for Amateur Radio operators, incorporating mounting plates for most common rotators with in tower structure allowing for safety in the use,and tilt over preventing the need for climbing towers during regular maintance

Safe Mobile Operations - Safety suggestions on operating and setting up amateur radio mobile station.

NAVTEX - The NAVTEX system is used for the automatic broadcast of localised Maritime Safety Information (MSI) using Radio Telex (also known as Narrow Band Direct Printing, or NBDP).

South East Michigan Scanner Page - A resource for scanner owners in the Detroit metro area, and surrounding counties. Featuring frequencies and information about public safety scanning.

Northern Electronics, Inc. - Offers 2 way commercial radios to public safety, fire, police. Also has battery database

Radios Online - Public Safety, Aviation, Military, Federal Scanning & HF Information

Amplifier Simulation Program - ASP 4.0 - Design weak signal GaAs FET or bipolar PreAmps. Automatically designs for optimum gain, NF, VSWR or all.

Universal LF/MF Preamplifier - "A ""Universal Antenna Preamplifier"" design, in Web page form. Works with long wires, loops, or whips. For longwave and medium wave."

432 MHz EME PreAmplifier - 432 MHz EME low noise amplifier. Circuit, components and image by Christoph Petermann DF9CY

Transistor Specifications - Transistor Specifications, ``RF Power Mosfets ¹ HF VHF transistors

IK4AUY Sergio - Advanced QRP Low Cost Mosfets HF Linear Amplifier with schematics, IMD, gain data and more. Six articles about amateur radio.

W7IUV HF Preamplifier - Schematic and pictures of a W7IUV preamplifier

2m Band VHF antenna pre-amplifier - Homebrew pre-amp for 144-146 MHz amateur band and OSCAR Satellites, using BF981 Dual-gate MosFet. Gain ~15 dB, NF=1dB.

VHF UHF preamp - ON6MU project for a vhf uhf preamplifier

144 MHz preamplifier with BF981 - Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.

Grounding Systems for Hams - Grounding Systems for Amateur Radio Stations, Safety grounds vs. radio frequency (RF) grounds, the practical station ground

50 MHz Transverter idea - Complete 144/50 MHz transverter with GaAs Fet LNA and 400 mW out. No printed circuit board. Schematics and images by Christoph Petermann DF9CY