filter rf

Inexpensive GPS mobile Antenna - An inexpensive external GPS antenna, for 1.5 GHz band for GPS receiver, If you operate APRS or just need an external antenna for your GPS receiver, here’s one that is easy to build yet offers surprisingly good performance in a compact size. Best of all, it uses commonly available components and materials.

Radio Foxtrot Denmark Priority listing - RFD dx club based in denmark

Zlog for windows - zLog for Windows is a freeware full-featured contest logging software that runs on Windows. It supports major international and domestic (JA) contests and is customizable to many other contests not directly supported by zLog. Features include CW keying via parallel/serial/USB interfaces, highly sophisticated TCP/IP network that allows instant synchronization of a log of an M/M station, rig control, PacketCluster connenction. By JJ1MED/AD6AJ

CN2DX Morocco - Expedition on Morocco from CN2DX, all activity

Russian Oblasts and prefixes - Russian callsign prefix series: RAA-RZZ, UAA-UIZ, includs Amateur callsign system in Russia

DXCluster IOTA spots - Live IOTA spots by the dxsummit dx cluster

K¤ARF Keeping Amateur Radio Fun - Keeping the fun in amateur radio with portable operating events and some contesting. Located in central Minnesota, U.S.A.

IW6MKI Uba I6YOT Mimma - A surf between radio history, home made and the sea.

Everything RF - everything RF is a web portal for RF & Microwave Engineers providing News, Design Articles, Information on new products and a component search engine which helps you find the RF & Microwave Components that are right for you.

Aceco - Frequency counters, bug finder, RF testers, distributed by WiMo Antennen

Mutek - Transverters, amplifiers and low noise preamplifiers

Palstar - Receivers, Antenna Tuners and accessories, antenna analyzers, dummy loads, wattmeters, shortwave radio receivers, baluns, filters

Servo RF Products - Direction finding receivers and finder products

G8SLB SSTV Packet modems - SSTV and Packet Radio interfaces for PC and Amiga computers.

YLE Radio Finland - Website of YLE radio finland, scandinavia, europe.

WINRLC - Simple freeware tool to calculate several kinds of HF filters. Use to calculate L-C and R-C band filters and bandpasses, L-C, L-R and R-C highpasses and lowpasses, coils and capacitors.

DSPFilter - MM Hamsoft  ^pop - Freeware DSP filter by JE3HHT

HamScope  ^{updated  pop} - HamScope is a freeware windows multi-mode communications package for amateur radio that supports: PSK31 BPSK and QPSK RTTY ASCII MFSK16 PACKET CW. Support radio control interface for several ICOM, TenTec, Kenwood, and Yaesu transceivers. Compatible with DXbase LOGic 7 RYLogit TRX-Manager YPLOG. By KD5HIO Glen

Scan505 - It is a simple freeware scanner program for the Kachina DSP505. The software does NOT control the radio thru the interface port - it works in conjuction with the Kachina control software using the file interface

BuTel Software - Software Information PC Interfaces for the scanning radio hobbyist & professional radio control applications

7 MHz SSB Transceiver  ^pop - Circuit diagram and discription of 7 MHz Ham Radio SSB Transceiver. Transceiver using two MC1496, 4.43 MHz Ladder filter, LM386, LM324 and IRF840 in final.

Ham Radio Circuits  ^pop - Circuits of SSB Transceiver, AM DSB Transmitter, Antennas, BFO, VFO, 807, FM Mike, Crystal filter and more.

HSCW transmit interface box - Versatile transmit interface circuit

PTT and Sound Card Interface - PTT and soundcard interface schematic by ON6MU

Interface for MS_DSP - Minimal interface circuits for receiver and transmitter audio, also for PSK31