filter rf

RFI Archives - RFI mailing list at contesting.com

Blackford County, Indiana Live Scanner feed - Blackford and surrounding counties Police, Fire, EMS, and EMA.

WEFAX - Weather and Amateur Facsimile - arrl wefax pages with members only articles such as FAX480 and SSTV Interfaces and Software, contains also a few links to wefax related web sites

PC to RTX interface - Schematics for IC-706, IC-718, IC-756PRO, TS-570, TS-870, and simple universal S.B. interface All three interfaces presented on this page employ galvanic isolation of the transceiver from PC computer. Audio paths are separated by transformers, optocouplers serve to separate the digital paths (PTT and RTTY keying).

FT-1000MP Band Select Output and Amp Keying Interface - FT-1000MP Automatic Band Selection Interface Bob Wolbert, K6XX

AZMap - Azimuthal maps generator - AZMap is a freeware Windows program for the Windows PC which will generate, display, and print an Azimuthal-Equidistance (A-E) map of the world, centered at any point on the surface of the earth (except very near the poles). The A-E map is also known as a Great Circle map since straight lines from the center point to any other point always fall along a great circle path and represent the shortest distance between the center and that point

Spectrum Lab  ^pop - DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more. Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle

ptelnet - ptelnet is a powerful communication software for the Palm Computing platform, By using the built-in TCP/IP stack (telnet mode), it acts as a Telnet Client. By accessing the serial (RS232 or IR) port directly (serial mode), it acts as a standard Terminal Emulator. Freeware

QRG_DB1 - QRG_DB is a database for the Palm OS computer to control a Yaesu FT-817 Transceiver via the CAT interface

Ferrite information - Ferrite Toroidal Cores, Magnetic Properties of Ferrite Materials, EMI - RFI Suppression Design Considerations, Ferrite Beads, Ferrites for RFI Ferrite Cores for RFI Suppression by CWS ByteMark

Icom interface box - interface box for Icom rigs that includes a band output port and a CI-V­to­computer serial interface

Motorola Micor Highband Preamp - Make 150.8 - 174 Mcs. RF Preamp properly tune the Two Meter ham band.

Interference Handbook - Interference to home electronic equipment is a frustrating problem; but, fortunately, there are several ways to deal with it. This handbook provides a step-by-step process for eliminating the interference

ARRLWeb: Computer EMI - How track and solve electrical interference from you computer

EMI from RF-Driven Lamps - Information about RF driven lamps

General Information about RFI/EMI - RFI/EMI RadioFrequency interference/electromagnetic interference by ARRL Technical Information Service page

FCC interference handbook - This is the electronic version of our "Interference to Home Electronic Entertainment Equipment Handbook"

Telephone Interference - Telephone EMI, questions and answers on how to solve interference problems to phone lines

RFI Information Page - This page gives information about Radio Frequency Interference, the unwanted reception of radio signals. You'll find out how to determine what is at fault (the transmitter or the receiver) and what you can do in either case.

EMI from Lamps - Radio Frequency Interference To/From touch lamps and dimmers

Using ferrites for interference suppression - This tutorial is meant to shed some light on the use of ferrites, and also presents some comparative frequency domain measurements both to illustrate some of the points, and to give designers an idea of what they might expect in using and specifying a ferrite component

Electromagnetics, EMI, EMC, EME, RFI - RADIOING eEngineer RFI EMI information

Ham Radio Online - Computer Networking RFI - This page is to provide links to resources and information regarding technologies to reduce computer interference

TVI filters - These filters are in use by hundreds of VHF weak signal operators and have been proven to be an effective solution for fundamental overload problems.

6m High Pass TVI filter - Are you suffering from TVI? Then why not try this filter for size. It is a three-stage high-pass filter that blocks low-frequency 50MHz signals while letting through UHF TV.