BeCERTAINN New Antenna

March 12, 2021

In February 2021 BeCERTAINN installed a Comet CA-712 EFC antenna for the repeater. This new equipment adds approximately 6 feet of height above the previous model and is tuned specifically for the GMRS band. In January, the antenna cable was replaced with high performance coaxial cable. After testing on multiple nets, the result has been improved repeater communication for the limited number of neighborhoods that experienced difficulty "holding the repeater" in the past, and clearer and cleaner signals for everyone else.

New Net Schedule: 2/month

March 2, 2021

Going forward, BeCERTAINN nets will happen twice per month, on the first and last Tuesday of each month, at 7:30pm. In September 2020 BeCERTAINN changed from weekly nets down to once per month nets (first Tuesday). After a member survey in January 2021, with results announced Feb 2nd, it was decided to try two nets per month.

GENOAK launches new website

May 28, 2020

The GMRS Emergency Network - Oakland (GENOAK) announced the launch of its official website at

Congratulations to our friends at GENOAK for the well designed site with great information. They quickly established a new GMRS group for Oakland and nearby cities, in collaboration with Oakland Community Preparedness & Response and the Oakland Firesafe Council.

BeCERTAINN website launched

March 2020

BeCERTAINN now has an official website at:

It includes information on the organization, our regular nets, and how to get involved. In development since October, it has finally been polished up and launched publicly.

CalOES Video on GMRS Radio

February 2020

The California Governor's Office of Emergency Services published a video about how a community in Northern California adopted GMRS radio to communicate during wildfires, when other services are down.

Grass Roots Radio Solves Rural NorCal Community's Disaster Communication Quandary

Short version (3m50s), Long version (5m40s)

EB Emergency Prep Fair

Oct 12, 2019

BDPNN hosted a Community Emergency Preparedness Fair at James Kennedy Park in Berkeley. BeCERTAINN and NALCO both had booths demonstrating radio communications, and had a solid stream of interested visitors. More info at the link below:

East Bay Community Emergency Prep Fair

City-wide Activation Drill

May 4, 2019

BDPNN and BeCERTAINN held a citywide drill that included communication via BeCERTAINN's GMRS radios and repeater. More info at the link below:

City-wide Activation Drill (with BeCERTAINN)

Presentation for BDPNN

Jan 31, 2019

The Berkeley Disaster Preparedness Neighborhood Network (BDPNN) hosted a presentation by Geoff about BeCERTAINN. Details at the link below:

BeCERTAINN: Repeater Radio Communications in a Disaster

New Repeater

Jan 15, 2019

In early January 2019, BeCERTAINN set up a new repeater that has a more powerful transmitter, and more sensitive receiver, so it should perform better for participants who had trouble hearing or reaching the repeater in the past. This also allowed us to change the outgoing PL tone from 71.9 Hz, so that it now matches the incoming PL tone of 88.5 Hz.

For more info, see this mailing list message.

Berkeley Path Wanderers Survey

July 22, 2018

The Berkeley Path Wanderers Association (BPWA) partnered with BDPNN and BeCERTAINN to survey paths and trails in the Berkeley hills, which could serve as evacuation routes in a fire, earthquake or other emergency. More info at the links below:

BeCERTAINN Path Survey Communications Report (PDF)

SF Curbed article: Berkeley group is surveying all city paths to better prepare for evacuations

Berkeleyside Article

Feb 01, 2018

Berkeleyside published an article highlighting BeCERTAINN, the radio technology, and how to get involved. It sparked a lot of interest in BeCERTAINN. Read the article at this link:

Berkeley neighbors seek to widen grassroots emergency radio system

First repeater announced

Jan 23, 2017

In January 2017, BeCERTAINN announced the availability of its first GMRS repeater. Read the original announcement here.