Jefferson County
By the numbers: about 33,056 residents (2023 U.S. Census estimate) · 83 licensed amateur radio operators — 31 Technician, 27 General, 5 Advanced, 18 Extra, 2 Novice · 3 licensed club stations · 5 more licenses in the FCC's two-year renewal grace period (FCC licenses, by ZIP).
Ham Radio Clubs
- Clifty Amateur Radio Society (W9EFU): w9efu.wordpress.com | ka9pij@arrl.org | Facebook Group | QRZ
Meetings: 1st Thursday monthly at 7:00 PM — Jefferson County EMA Building, 620 Green Rd, Madison, IN
Nets: Thursdays 7:30 PM on 145.170 MHz (−0.6, PL 103.5) except meeting nights; 3rd-Thursday 70cm net on 443.475 MHz (+5, PL 103.5)
Repeater(s): 145.170 MHz (−0.6, PL 103.5) FM, Madison; 443.475 MHz (+5, PL 103.5) FM, Madison
Repeaters
Our directory lists 2 amateur radio repeaters in Jefferson County on the 2m and 70cm bands. A dash means we don’t have that detail on file — check with the sponsoring club or RepeaterBook before you rely on it.
| Frequency | Offset | Tone | Mode | Location | Sponsor |
|---|---|---|---|---|---|
| 145.170 | -0.6 | 103.5 | FM | Madison | Clifty Amateur Radio Society (W9EFU) |
| 443.475 | +5 | 103.5 | FM | Madison | Clifty Amateur Radio Society (W9EFU) |
View Jefferson County on RepeaterBookBrowse all Indiana repeaters
Emergency Communications
Jefferson County is part of Indiana ARES District 9 (which mirrors IDHS District 9). Learn how amateur radio supports emergencies in Indiana — ARES, RACES, and Skywarn — on our EmComm page.
Severe-weather watches and warnings for Jefferson County come from the National Weather Service — NWS Louisville office. Trained Skywarn spotters relay reports during severe weather; see our EmComm page.
The information on this page may not be fully up to date. If you notice anything incorrect or missing, please email campbell@indianahamradio.com with the correction.
Nets in Jefferson County
2 nets meet regularly in Jefferson County. Visitors are welcome to check in — see the full Indiana net schedule for statewide nets too.
- Clifty Amateur Radio Society Net
- Clifty Amateur Radio Society 70cm Net
Nearby counties
Jefferson County borders 5 other counties. Repeaters and clubs just across the line are usually well within range, so it is worth checking them too: