Offline Tool
Repeater Offset Calculator
Enter the repeater output (RX) frequency — get the standard mobile transmit frequency.
Calculate standard repeater input frequencies for 2m, 70cm, GMRS, and more. Offline offset helper. Works offline after your first visit.
Enter the repeater output (RX) frequency — get the standard mobile transmit frequency.
The MHz difference between a repeater's output frequency (what you listen on) and input frequency (what you transmit on).
Typically +600 kHz in the US, but always confirm for your local repeater.
KI4TQN is a ham radio, GMRS, and emergency communications hub from East Tennessee — free tools, local reference data, YouTube-aligned guides, and consulting for property owners. Use this map to find your lane.
Pick a path: FCC-licensed GMRS, ham exam study, FRS, Meshtastic, just licensed, emcomm volunteer, or property owner.
113 offline browser tools plus step-by-step deployment workflows. Install the site as a PWA for field use.
Tri-Cities, Erwin / Unicoi (I-26), NETNRC linked repeaters, nets, HF listening, go-bag sheets, and ARES/RACES context.
Blog, videos, downloads, antenna reference, and curated radio links — tied to the YouTube channel.
Paid emergency communications consulting for estates, ranches, and remote properties — plus contact and newsletter.