rf preamp

Interference Cancelling System - The use of interference signal cancellation has been around for some time. The idea is to use an auxiliary antenna almost any random length of wire in addition to the main receiving antenna

Indoor Random Wire versus Indoor Magnetic Loop - Comparison of performance between an indoor random wire versus a magnetic loop using psk31

RF Cafe - Amateur Radio Links - RF Cafe is a unique portal of RF, microwave, wireless, and other engineering resources. Vast collection of equations, references and conversions for electrical, mechanical, physical, and mathematical fields.

EZMaster by HamRadioSolutions - EZMASTER the all mode all in one interface. USB/Parallel/Serial Device. Include 75 sec Digital Voice Keyer, K1EL Winkey CW Keyer, SO2R switching, two radio interface, two RTTY audio insulated ports, two flexible Antenna Switch control. Ideal for Contesting, SO1R, SO2R, field day and daily activity. Compatibile with all software on the market : CT, CTWIN, TR, NA, WriteLog, N1MM, WinTest, MMTTY, MIXW and more .

Wavenode SWR and RF wattmeter - The WN-1 is a precision RF Watt, SWR, and DC Meter to digitally monitor your amateur radio and emergency communications stations.

VLF-LF And the Loop Aerial - The article discusses the theory of loop aerials for receiving and how they reduce the level of local noise. A Loop Aerial is described suitable for use on the LF and VLF bands together with a circuit of an interface loop tuner and preamplifier. The discussion extends to the problems of amplifier noise and the advantages of tuning the loop.

RFA: Radio Free Asia - Radio Free Asia (RFA) is a private, non-profit corporation broadcasting news and information in 9 languages to listeners in Asia

Radio for Peace International - Radio for Peace International (RFPI) is a Global Community Radio Station located in Costa Rica, Central America that broadcasts progressive news on shortwave radio and the internet on topics of Peace, Human Rights and the Environment. RFPI gives a voice to the voiceless by promoting democratic communication.

Radio Austria International - The radio voice of the Government of Austria broadcasts worldwide in numerous languages.

Radio Free Vietnam - DPT Viet Nam Tu Do - Vitnamese clandestine radio

RFE/RL Uzbek Website

Radio Free Europe / Radio Liberty

Radio Svoboda

Slobodnaevropa - Serbia montenegro

RFE/RL - Tatar-Bashkir Service Site

RFE/RL Lithuanian Service - Lithuania

Radio Briva Eiropa - Latvia

RFE/RL Kyrgyz website - RFE/RL Kyrgyz Service

Radio Azattyq - RFE/RL - Kazakistan

Radio Farda - Iran

RFE/RL Georgian Service Site

Raadio Vaba Euroopa - Estonia

Nec2Go - Powerful antenna modeling tool using NEC 2 computing engine. Nec2 specifically provide users, either those experienced with the Nec2 processes, or for those who are neophytes but want to model their own antennas. Nec2Go uses a simplified process for defining the antenna structure and then providing view of the structure, plots (2D and 3D) and other significant data that is pertinent to the design. This simplified process uses an edit file with equations for all definitions.

Small Signal RF Amplifier - A bipolar small signal RF amplifier

Icom Yaesu and Kenwood CAT interfaces - Here you can find a a selections of CAT interfaces for ICOM Yaesu Kenwood