Shiawassee County Repeaters

SARA Home Page ~ last update: 26 Dec 2022

Shiawassee County Repeaters

Try these:

Call / Type Frequency / offset PL Tone Comment

W8SHI / D-Star 145.240 - 0.6 MHz Shiawassee ARES / Owosso

N8IES / Analog & P25 145.29 - 0.6 MHz Bancroft

N8VDH / C4FM-WIRES 147.02 + 0.6 MHz 100 Hz (I/O) Gateway Connected / Owosso

N8VDH / C4FM-WIRES 442.400 + 5 MHz 100 Hz (I/O) Gateway Connected / Owosso

W8CMN / DMR 443.3125 + 5 MHz CC/01 Central MI Emergency Network / Bancroft

W8SHI / D-Star 444.300 -+ 5 MHz Shiawassee ARES / Owosso

Procedures / Protocol ~ Important Repeater Guidelines

Long Tone Zero [LiTZ]

LiTZ is a procedure to use a DTMF 'long tone zero' {5 seconds} at beginning of a transmission and then asking for needed assistance. This is 'NOT' a CQ or ragchew procedure just use when someone needs assistance from a fellow amateur radio operator. It is a Touch-Tone based all-call priority alerting system to be used on 'any channel' for requesting mutual assistance. Use LiTZ only when your normal voice calls go unanswered or the initial people responding can not help you.

For further information refer to QST (Oct 1992, page 82; Nov 1992, pages 108-110; Dec 1995, pages 25-31) [information and decoders]. Automatic control to break squelch is used in some areas by using a "long zero DTMF" scheme, This allows frequency monitoring by listeners who then only hear people needing assistance.

Wilderness Protocol

A suggestion for those outside their normal repeater ranges should monitor standard simplex channels {primary is 146.52 MHz} for priority traffic. The protocol suggests stations should monitor primary and secondary frequencies, if possible, every three hours starting at 7:00 AM local time for a 5 minute period ~ 7:00 AM; 10:00 AM; 1:00 PM; 4:00 PM; repeating until 10:00 PM. If possible monitor every hour at the top of the hour. Secondary frequencies to consider: 52.525 MHz; 223.5 MHz; 446.0 MHz; & 1294.5 MHz. Use the Long Tone Zero protocol for assistance needed calls. Hold CQ and normal transmissions until four minutes after the hour start. This allows for standard listening times for people needing assistance. Refer to QST for further information (Feb 94; page 100; Apr 1994; page 109; May 1994, pages 103-104).

Michigan Repeater Council

The Michigan Repeater Council coordinates repeaters in the state of Michigan. Their repeater directory site can be used for entire state of Michigan is at: Michigan Repeater Council Directory [MARC]

The Owosso Repeaters are Coordinated through this process ~ Michigan Repeater Council.

The Michigan Area Repeater Council has a SE Michigan [MARC's] Quadrant Repeater Directory listing repeaters mainly for the SE corner of Michigan (and some of our 'central lower counties').

You can also try the Repeater Book for an online index of repeaters and information (not affiliated with MARC).

Offset Frequencies

Until you become accustomed to using repeaters on all the different ham radio bands, this table may assist you in using the right offsets commonly used. Many radios have the standard options preprogrammed, but you need to be aware of what yours should be and act accordingly.

Frequency [MHz] of Offset from Repeater Output to Input
Repeater's Output Range

6 Meters 51.62 to 51.98 -500 kHz
52.50 to 52.98 -500 kHz
53.50 to 53.98 -500 kHz

2 Meters 145.2 to 145.5 -600 kHz
(watch channel Spacing) 146.61 to 146.94 -600 kHz
147.00 to 147.39 +600 kHz

1/1/4 Meters or 222 MHz 223.85 to 224.98 -1.60 MHz

70 cm or 440 MHz 442 to 445 +5 MHz or - 5MHz
(local custom set above/below outputs)

23 cm or 1296 MHz 1282 to 1288 - 12 MHz
1290 to 1294