Sierra Niners

High signal insights straight from the maker of RadioMail.

A video series exploring RadioMail features and best practices for amateur radio operators.

Latest Episode

AX.25 Packet Digipeaters and Scripts

Join WH6AZ as he explores how to send and receive Winlink messages using AX.25 packet radio with RadioMail on iOS. Learn the basics of packet communication, how to extend your range with digipeaters, and how to build custom scripts to connect through multi-hop packet nodes, including cross-band and off-grid setups. This episode walks through practical examples with live traffic monitoring, protocol breakdowns, and ends with a four-hop success story. A must-watch for anyone looking to push their packet skills to the next level.


April 08, 2024  • 17 minutes

Previous Episodes

B.B. Link Adapter DIY

Are you a Kenwood TH-D74 or TH-D75 owner frustrated by the lack of Bluetooth support for iOS? In this episode, WH6AZ takes a slight detour...


February 03, 2024  • 27 minutes

P2P VARA HF with iPad

Join WH6AZ for a live walkthrough of sending a peer-to-peer (P2P) message using VARA HF and the RadioMail app on iPad. Learn how to configure...


January 05, 2024  • 10 minutes

Portable VARA HF HotSpot

Go off-grid and on the air! In this episode, WH6AZ shows you how to create a VARA HF hotspot to send and receive Winlink email...


December 12, 2023  • 17 minutes

Portable VARA FM HotSpot

Can you check email from the jungle? With a headless VARA FM hotspot and RadioMail, yes you can. In this episode, WH6AZ walks you through...


December 12, 2023  • 28 minutes

Add Location to Your Messages

Want to add GPS location to your Winlink messages—automatically? In this episode, WH6AZ shows how RadioMail supports embedded location headers in every message you send....


October 14, 2023  • 7 minutes

Simulated Emergency Test (SET) Exercise

Step into an off-grid emergency comms simulation with WH6AZ using RadioMail on iOS. In this episode, he participates in a statewide Simulated Emergency Test, showing...


October 14, 2023  • 10 minutes