hf filter

SM4DHF Logbooks Collections - Links to more than 400 amateur radio logbooks on Internet.

SV1BHF Nicholas - Links for ham radio and yachting

SV8CS Spiros - Dx on Hf specially on low bands from Zante island Greece

Digital Signals - signals and sounds available on shortwave/vhf radio today along with information on the available equipment needed to understand, analyze or identify these signals

Array Solutions - WX0B - Stacking and phasing HF and 6m arrays antenna switches and contesting devices. Custom low band antenna arrays, bandpass filters,commercial/Mil STd filters,microwave components, commercial broadcast filters.

KMA Antennas - KMA Antennas specializes in HF - VHF - UHF Log Periodic Antennas, unique antennas for the Six Meter band and custom antenna designs.

Barker & Williamson - Dipole antennas, unique broadband antennas, trap dipole antennas, coils, accessories for HF radio

Hy Gain  ^pop - HF UHF/VHFAntennas, dipoles, accessories and rotators

Delta X-Ray Antennas - Antenna Manufacturer HF Delta Loops and VHF/UHF Ground Planes

HD Communications - Rf Connectors,RF Amplifiers,RF Filters,HF cable and accesories. Tower hardware valves and tubes

Kiwa - Filters and performance upgrades for many receivers

GB Antennas and towers - HF VHF/UHF yagi and quad antennas, towers and headphones manufactured in holland

Vectronics - Antennas, Filters, accessories, wattmeters, tuners and amplifiers.

VK4 Queensland Repeater Listing - VHF UHF Repeaters in VK4 Queensland Australia

Long Path Propagation - Long path hf radio propagation is sometimes the best path to work dx, since the shortest path is not always the best path.

UK Scanner Frequencies - The UK Scanning Directory - HF, VHF and UHF UK Scanner Frequencies Database Updated Daily by a dedicated group of Radio Amateurs and SWL Listeners

YV-5 Communications, Inc - YV-5 Communications, Inc. Homepage, HF-VHF-UHF Radiocommunications Equipment

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

XPWare - It offers support for AEA, Kantronics, SCS/Paccomm and Hal controllers. The program also offers full transceiver control for most of todays HF radios. The program also support DX Cluster monitoring

VHF-DX - VHF-DX for Win95/98 is a VHF/UHF Logging Program specifically designed for 50MHz and above operation.

Scanner VHF-UHF monitoring - Scanner VHF-UHF software for monitoring VHF-UHF range by means of receiver ICOM IC-R8500.

FT736 - Tuning control of the Yaesu FT-736R multiband VHF/UHF transceiver.

Tunekit - Filter Tuning Kit for Windows is a electronic filter synthesis program and a practical filter tuning aid for actually designing and building a working filter

TVI and BCI Filters - TVI and BCI bandpass and bandstop filters in SMD technique. Schematics and images.

Lowpass filter for 5MHz - The following lowpass filter was built using the tables in the arrl manual, it is a 5 section one and seems to work ok