A Repeater is a radio installed at a location specifically selected to provide communications between stations that would be unlikely to communicate directly due to either terrain or distance. FM voice repeaters receive on one frequency, and re-transmit the received audio on a different frequency. This does require some specialized equipment.
Digipeaters are used in APRS and Packet modes. Digipeaters are store and forward devices that receive and after a short period re-transmit the received data packet on, the same frequency.
Don’t worry if you don’t understand the following information. Check out the FAQ or come on down to the clubhouse on any Sunday morning and you will meet several people eager to explain what all this means.
The Marin Amateur Radio Society operates several open voice repeaters in Marin County, under the call sign K6GWE:
- The VHF Simulcast Voice Repeater System – 146.700 Mhz, negative offset, various pl (see below)
- Mt. Tam Stand-Alone VHF Voice Repeater – 147.330 Mhz, positive offset, pl 179.9 Hz. (Preferred High-Level Repeater)
- San Pedro Ridge Backup VHF Voice Repeater - 147.330 Mhz, positive offset, pl 173.8 Hz.
- Mt. Tam UHF Voice Repeater – 443.250 Mhz, positive offset, pl 179.9 Hz. [In 2017, we plan to install the Yaesu Fusion digital repeater on this frequency and at this location.]
- San Pedro Ridge UHF Voice Repeater – 443.525 Mhz, positive offset, pl 82.5 Hz.
Suggestion for VHF memory channel programming from John Butler, KF6GNI.
Marin VHF voice repeater systems:
|Ch. 1||146.700 MHz – pl 203.5||Big Rock Ridge||Linked – Simulcast System|
|Ch. 2||146.700 MHz – pl 179.9||Mt. Tam||Linked – Simulcast System|
|Ch. 3||146.700 MHz- pl 167.9||Mt. Barnabe||Linked – Simulcast System|
|Ch. 4||147.330 Mhz + pl 179.9||Mt. Tam West Peak||Stand-Alone Repeater (High Level Site – Preferred)|
|Ch. 5||147.330 MHz + pl 173.8||San Pedro Ridge||Backup repeater ( Low level site)|
|Effective 6/10/15 Ch. 4 now operational.|
|Ch.5 should NOT BE USED ROUTINELY, after Ch. 4 becomes operational. It is A BACK UP to Ch. 4.|
|Additional Optional Channels that could be programmed (Editor)|
|Ch. 6 (FUTURE)||(FUTURE late 2016 or 2017) 146.700 MHz – pl 192.8||Mt. Tam West Peak||Linked INPUT – Simulcast System (FUTURE)|
|Ch. 7||443.250 Mhz + pl 179.9 Hz. [In 2017, we plan to install the Yaesu Fusion digital repeater on this frequency and at this location.]||Mt. Tam||Stand-Alone Repeater|
|Ch. 8||443.525 MHz + pl 82.5Hz||San Pedro Ridge (San Rafael)||Stand-Alone Repeater|
|All other combinations of frequency and PLs for MARS’ Repeaters are now obsolete and should be deleted.|
|ALL DRILLS AND PUBLIC SERVICE EVENTS THAT WISH TO USE THE REPEATERS FOR COMMUNICATIONS NEED TO CONTACT THE K6GWE TRUSTEE FOR PERMISSION.|
|MARS’ AGREEMENT WITH MARIN RACES ALLOWS THE USE OF THE REPEATERS DURING DECLARED EMERGENIES.|
Northern Amateur Relay Council of California (NARCC) Repeater Coordinating Council [Northern CA]