Antennas, Transmission lines, Propagation • is a simple and fast app that allow you to calculate the loss of your coax line and calculate power output from your antenna system. • CocoaNec is a Mac OS X application intended primarily for the design and modeling of antennas. • DX Toolbox gathers information from the web on solar and geomagnetic conditions that affect radio propagation.

Dire Wolf is a software 'soundcard' AX.25 packet modem/TNC and APRS. Open Source: Runs on Windows, Linux (PC/laptop, Raspberry Pi, etc.), Mac OSX.

It displays in real-time Solar Flux, A-Index, K-Index, and much more. • RF Toolbox (formerly Antenna Master) is an antenna design electronics/electrical tool package. It takes you step by step through the design of a variety of antenna types including Dipole, Fat Dipole, Yagi, J-Pole and more.

• A Java-based application for development of Smith charts. Written by AE6TY for use with OS X, Windows, and Linux. • This is a simulator for the popular, series capacitor, parallel inductor T-network tuners. As a java applet/application, you can run this program through your web browser.

• A transmission line caculator Java applet that can be run on your computer or by using your web browser and the Internet. See instructions for downloading and running on your computer. • (Voice of America Coverage Analysis Program) is free professional high-frequency (HF) propagation prediction software from NTIA/ITS, originally developed for Voice of America (VOA). • This java applet/application implements a simple yagi modeling code. The initial input is a really trivial 2-element yagi. Audio Analysis, Recording and Signal Generation • Amadeus Pro is a powerful multitrack audio editor supporting a variety of formats including MP3, AAC and more. Has a variety of tools for adjusting audio, making sonograms or performing spectrum analysis of your recordings.

• Audacity is a free, easy-to-use open-source and cross-platform audio editor. You can use Audacity record, import/export, edit and perform detailed analysis of any recording. • Audiocorder is a sophisticated yet easy to use audio recording program that allows you to record from any audio source connected to your Mac with a click of a button. • Simple-to-use audio analysis and waveform visualization tool.

It is now retired but we have used it and it works well. • iSpectrum is a free, simple and easy to use audio spectrum analyzer that allows the user to view live audio in a standard frequency plot as well as a waterfall display. • Cable-Free audio routing through virtual audio cables. Ideal for connecting ham radio software to a variety of inputs and outputs.

• Professional quality signal analyzer, 1/3 octave RTA, signal generator, and more. Format usb drive for mac disk. Perform real-time analysis using your Mac’s sound input for the signal source. • SignalScope is a signal analyzer designed to work with Mac OS X compatible audio hardware.

It functions as a FFT analyzer as well as an oscilloscope. Also available in a Pro version.

• Cable-free routing of audio between any applications using virtual audio devices. An excellent way to connect SDRs and other radios to a variety of input and outputs. • Versatile, real-time, precision signal / waveform generator. Precision waveform generation with 6 digit frequency resolution and an intuitive, easy to use analog-style signal generator user interface. • Full featured audio editor for Mac OS X v10.4 or newer as well as iPad. Free for home use, or purchase for full access to professional features. Blogs, Websites, Email Reflector Lists and Social Media Sites • Your independent source for Amateur Radio news for today’s radio amateur.

An active part of the amateur community for more than 35 years!!! • Facebook page dedicated to OS X and iOS amateur radio. Mostly in German. • Generic mailing list for all of Dog Park Software’s products. • Mailing list for support of dogparkSDR software.

• Ham Nation is an ongong podcast hosted by Bob Heil, Gordon West, George Thomas, Don Wilbanks and Cheryl Lasik and brought to you by TWiT.TV • Email reflector for ham radio operation on Macs. • Mailing list for support of Fl* software on Linux and OS X. • Yahoo mailing list for amateur radio using Macs.

Great knowledge base, but low activity level. • MacHamRadio.com’s Facebook page. • Support mailing list for MacLoggerDX logbook program. • Amateur Radio News and videos. Circuit Design, Analysis, Aids • Draw, save, edit and print complete professional circuit diagrams using powerful features like bussing, multi-level Undo/Redo, and automatic gate packaging. • KiCad is an open-source cross-platform schematic capture software package for circuit design.