Reference Materials

• SARA's Mathematics Reference ~ Fractional Equivalents, Formulas and Math Links for Hams.

• SARA's Electronics Reference ~ Basic Electronics Materials for Hams.

• SARA's Bearing Calculations ~ Excel File Download

• SARA's Capacitor Reference ~ Disc / Monolithic Markings Guide and Basic Information.

• SARA's Coaxial Cable Reference ~ Coaxial Cable Characteristics and Stubs.

• YB0EM's Coax Data ~ Great Data site for cable characteristics.

• dBm - volts - watts Conversion // return loss vs VSWR ~ from Mini-Circuits - see them for great support and parts.

• SARA's Transmission Line Calculations ~ Excel File Download.

• SimSmith Charting Program ~ Using a simulation program to utilize power of the Smith Charting.

• VSWR / Transmitted Power (Mini-Circuits) ~ App. Note AN40-013 from Mini-Circuits

A couple of SARA members bought 'Zumspot / Nextion Pi-Star Kits' and we are sharing information and links for the setup here. Hamvention 2019 was a good time! Have more fun! Here are some papers and links to get moving with a ZUM spot / Nextion Display / Raspberry Pi 3B.

First, get this document: Ham Radio Outlet's ZUMSPOT 2.4 Nextion Startup Guide and follow their excellent directions, is is simple to get going. The following links are 'cleaned' and re-shown below for further reference.

Pi-Star is great software for digital voice hotspots and repeaters. It can handle DMR, D-STAR, and YSF, as well as P25, NXDN, POCSAG, and some cross modes when used with a multi-mode digital voice modem that supports those modes. Read about it in Playing with Pi-Star by KE0FHS, an additional paper on configuring and using Pi-Star.

• MMDVM Yahoo group: ~ MMDVM Yahoo.

• Pi-Star support Forum: ~ A UK Support Forum.

• Pi-Star Fackbook support group: ~ Pi-Star Facebook Group.

• Pi-Star Wiki: ~ Pi-Star Wiki.

• ZUM Radio Interface Facebook group: ~ ZUM of Facebook.

In general, members found the ZUM spot easy to use.