dsp filter

QRZCQ.com - The DataBase for radio hams, callsign database, DX Cluster filtering, forum calendar and resources

L-com - WiFi Antenna, WiFi Amplifier, RF Splitters, RF FIlters, Adapter, Video Cable and Custom Connectivity Products

Olympix - Performance RFI Filters that work right at the noise sources, ferrite cores.

AC0C Roofing Filter - Yaesu FT-950 and FT-2000 Roofing Filter Optimization and Improvement

NexTek - Lightning Arrestors, High current filters manufacturer

Audio filters and speakers - Review of common audio speakers for mobile setups

Baofeng LPF mod by G0FTD - A modification of the UV3R Baofeng handheld transceiver to improve the built in low pass filter

Wadsworth Repeaters - The GE Master Exec II receiver employs a five cavity helical input filter to insure out of band rejection.

EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications

DL4YHF WinPic Programmer - A PIC Programmer for Windows, support for dsPIC, PIC10F, new PIC12F6xx family, PIC16F9xx, PIC18F

Yaesu DSP Settings and Pin Connections - Yaesu DSP audio settings for Heil Sound headphones

Elecraft DSP audio settings - DSP Settings and Mic Connections for Elecraft K3

Band-stop filter - Wikipedia page on Notch filter, a narrow stopband - high Q factor filter

TVI Filters - Schematic and diagrams for TVI Filters by G4WPW

440Mhz Interdigital Bandpass Filter - Homebrew Amateur Radio 440Mhz Interdigital Bandpass Filter

23 cm filters - 2 filter designs a 3-pole and a 5-pole

Notch Filter Designer - Online calculator, Butterworth Bandstop (Notch) Filter Designer

Constant k Lowpass Filter Design - Online Constant - k Lowpass Filter calculator

Homebrew Crystal Filter Design - Desgining crystal filters and find out crystal data by measuring it.

Highpass filter calculator - Butterworth Highpass Filter Designer

About Cavity Filters - Cavity filters are tipically circuitry behind a duplexer that allow only certain frequencies to pass

Cheap Crystal Filter - An economical way of building an SSB filter. The circuit is for a filter with a 6 DB band width of roughly 2.2 KHz.

Icom DSP Settings and Pin Connections - ICOM audio DSP settings and pin connections for heil sound headphones

Kenwood DSP Settings and pin connections - Kenwood radios audio DSP settings for Heil Sound headphones

RF Probe Project - If you needed the ability to quickly measure RF voltage for tuning filters and cavities this RF Probe probe is for you