spectrum circuit

The 4X4 Slimtenna - Development of the Slim Jim antenna for HF

CSMA - CT Spectrum Management Association

TASMA - Twin-Band Area Spectrum Management Association

NESMC - New England Spectrum Management Council

Aaronia AG - Spectrum Analyzers - Handheld RF Spectrum Analyzer, EMC & Pre-Compliance Antennas, USB Analysers, Near Field Probes, EMF Shieldings

Tektronix - Spectrum Analyzers - Delivering confidence to confront the most challenging microwave and RF designs. Spectrum Analyzers by Tektronix

Agilent - Spectrum analyzers - Agilent maker of Oscilloscopes, Analyzers, Meters - Spectrum Analyzer (Signal Analyzer)

Adding 160 meters to the Heathkit SB-220 - There will be radical changes to this Heathlit SB-220. There will be the addition of 160 meters along with many other circuit and design changes.

MorseDec - MorseDec decodes and encodes Morse with a range of 5 to 50 wpm. It includes: auto-tracking for wpm speed, macros, spectrum analyzer. Easy to use but powerful.

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Integrated Circuit Audio Amplifiers - Circuit designs for IC audio amplifiers by N1HFX

Design Guidelines for JFET Audio Preamplifier Circuits - Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell N1HFX

Adjustable Regulated Battery Charger - This battery charger circuit is regulated and adjustable to make this circuit able to charge the mosto NiCAD battery.

RF Dummy Load - The use of dummy load is mandatory for off-air adjustment of the transmitters. Build one.

DC RF Sensing PA Switching - Circuit for dc/rf sensing pa switching from g8mny

Noise Bridge Tuner Tuner - Noise bridge circuit to tune your tuner

QLF Filter - Microprocessor based interface designed receives a signal from a Morse key, processes it, and re-transmits it to the radio. A microprocessor in the circuit is pre-programmed with a proprietary algorithm which makes a number of measurements and adjustments to the less percise human generated code.

A low cost morse Trainer / Keyer - By Prof. T. K. Mani - VU2ITI

FT290 CW KOX Circuit - This is not actually break-in but just KOX circuit. It can only be used on the CW mode otherwise it keys up the Tx

Non-relay instant RF Switching - Coax lines to do the RF switching. The advantages are instant switching, no power wasting DC control circuits.

An Accurate Power Meter For QRP Ops - A circuit using two junkbox transistors and a garden variety op-amp that will let you accurately measure your rig\'s flea power down to milliwatts.

How to use HamAlyzer - How to use software Spectrum Analyzers like HamAlyzer by W3OZ

A Guide to Spectrum Analyzers - What you really need to know about spectrum analyzers

Oscilloscope Tester - Circuit to assist in the setting-up and calibration of oscilloscopes