FREQUENCY Coordination

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 SPECTRUM Coordination

The Karo-Echo Coordination Team:  Don, NI6A, team lead. Fresh team members are solicited. Contact ni6a at arrl dot net 

Job Duties: To coordinate radio frequency usage for radio disaster services in order to minimize interference on Ham, GMRS, FRS, and Digital Networks and establish a Message Center protocol to coordinate and maximize inter-operability between networks, as well as to titrate message precedence.   

Communications Coordination encompasses two critical domains

1: Ham Radio Simplex Frequency Coordination 

A: Ham Radio Simplex Frequency Coordination between all Karo/Echo CERT Areas and the EOC 

B: Ham Radio Simplex Frequency Coordination with neighboring EMcomm (Emergency Communications organizations and ACS (Auxiliary Communications Systems) Outside of Kensington/El Cerrito 

2: FRS/GMRS Frequency Coordination 

Each CERT Area will cooperate by reporting their primary and secondary FRS and GMRS frequencies. Frequencies/channels should be staggered in order to avoid inter-area interference between adjacent CERT areas. Intra-area channel choices are relegated to the individual CERT area coordinators, but should be coordinated through KE's Coordinating body. Each Area shall do their own intra-area mapping in the attempt to establish 100% communication between FRS block stations and Ham radio dual station or GMRS/Ham dual stations for relay to the Area ICP without the need for relays, if possible. 

The following CERT areas have applied for the following frequencies. 

CERT AREA KEN6: FRS/GMRS Channel 6 primary and FRS/GMRS Channel  1 secondary. Status: Coordinated 

CERT AREA EC1: Status: Pending

CERT AREA EC4:  FRS/GMRS Channel 2 primary and FRS/GMRS Channel 7 secondary . Status: Coordinated

CERT AREA EC5: FRS/GMRS Channel 5 primary and FRS/GMRS secondary (TBD). Status: Coordinated

CERT AREA EC7 FRS/GMRS temporary allocation with EC8 on Channel 4

CERT AREA EC8: FRS/GMRS Channel 4 primary and FRS/GMRS Channel 6 secondary. Status: Coordinated 

CERT Area EC9 (Now Designated Delnorte) : FRS/GMRS Channel 15 primary and FRS/GMRS Channel  2 secondary Status: Coordinated (Note EC9 is now an open net. Anyone can take NCS, or if no NCS, the format will be as in an open roundtable. Please drop your name or callsign to announce yourself.  


GMRS/FRS Mapping: Each CERT Neighborhood Area should be mapped so that block dead spots and hot spots are identified and remedial measures implemented.   

Frequency Coordination between CERT areas (Inter-Area) through the use of Amateur Radio and GMRS Interfaces

The KARO/ECHO primary frequency 146.415 MHz with 146.475 MHz as secondary. 

The assigned Contra Costa County OES frequency for KARO/ECHO CERT is 146.475 MHz simplex. 

No GMRS inter-area coordination has yet been established. 

Mapping: All operators should become familiar with propagation characteristics over local terrain. We know that the earth, steel concrete buildings, and large objects impede signal through put. Each location should get a good idea  of these basic principles through mapping stations that they are able to establish direct contact and those which are marginal or out of range.  Each operator must experiment in order to  understand basic radio propagation principles. Beginners can practice at each net simplex check-in.  Each HAM station should have the capability of contacting the EOC on simplex. Each FRS/GMRS station should strive to contact their Staging Area or ICP.  If limited to FRS please map your own neighborhood block to establish maximum range. When range needs to be extended explore the possibility of installing an outdoor GMRS antenna and/or increasing GMRS power output.

Mapping Tool: Just enter the address that you want to contact and see the path and obstructions if any

Coordination with neighboring EmComm organizations

Communication and coordination is necessary in order to minimize interference and to arrange for mutual aid if needed, since, many disasters are local and not widespread equally among geographical regions. Mutual-aid can take the form of training exercises, skilled operators, and sharing needed resources such as water, food, medicines, generators, skilled nursing, rescue equipment etc. This is especially valuable if our local agencies are overworked and unavailable. 

Ham Simplex Frequencies for West Co Co County


CoCo County OES Martinez Siimplex 146.505 mHz

Richmond City 147.450 mHz Simplex CERT & EOC

San Pablo 147.495 mHz Simplex CERT

Pinole 147.570 mHz Simplex CERT

Crockett 146.490 mHz CERT Simplex

Hercules 147.540  mHz CERT Simplex

Richmond EOC Monthly Radio Tests first Thursdays 10:30 AM 147.450, 441.000 and 223.400 Simplex

KaroEcho 146.415 mHz Thursdays 1900 but not until the West Co Co net ends Simplex


Local GMRS/FRS Nets


Del Norte -- EC9 FRS/GMRS Neighborhood Net First Wed. 1900 ch. 15 (This is an open net) Join 

EC4 FRS/GMRS Neighborhood Net First Wednesdays 1845 ch. 2

KEN6 FRS/GMRS SW Kensington Net: 1st and 3rd Mondays, channel 6 (462.6875) at 1900


West County GMRS/FRS Wide Area Net -- first Wednesdays -ch 19 (alt ch. 17) simplex at 1100

East Richmond Heights First Wednesdays (R2R) FRS/GMRS 1930 Ch.7

BeCERTAINN(Berkeley CERT And InterNeighborhood Net)-1930 1st & Last Tues GMRS Ch.22/R (+5 PL 88.5)

Albany CERT Radio Club weekly FRS/GMRS Net every Wednesday at 1900 on FRS/GMRS channel 19

Live SDR Feeds to Contra Costa County Fire, Police, CalFire, W6CX Repeater, and related live feeds

Local and Regional Ham UHF/VHF and Area HF Nets -- All Times Are Local

Repeater Output Frequencies are those listed. Input offsets for 2m is 600kHz + (up) or - (down).

The 70cm transmit offset is 5mHz up (+) 

VHF/UHF Weekly Nets:

1935  Mon CoCo Cty Repeater Assn (CCRA) 145.41, 147.735, 145.490 kHz, -600kHz, PL107.2 (WA6HAM Linked Repeater System)

2000  Mon Salvation Army Team Emergency Network (SATERN) 147.060 mHz +600kHz, PL100 (linked with 224.780 + 1.6/441.325 + 5 mHz (W6CX/MDARC Repeater System)

2000  Mon  SF Amateur Radio Club 145.150 mHz (-600) DTCS 664

1930  Tues Marin RACES Primary 146.7- mHz - pl 203.5 Bahai, pl 179.9 Mt. Tam (East Peak), pl 167.9 Mt. Barnabe (Novato),  192.8 Tam West Peak (All Linked Simulcast System)

1915  Tues West Marin 443.250 mHz pl 179,9+ and 147.330 mHz pl 192.8+ Tam Middle Peak (both stand alone repeaters- not linked)

2000 Tues (every 2 weeks) Contra Costa Digital Practice Net 147.060 + (100PL); linked with 224.780 MHz; PL 77.0, and on  441.325 + (PL 100.0)

1900 Wed SkyWarn Net 147.060 + (100PL)

1930  Wed UCB/EECS ARC -- Cory Hall UCB with NU6XB/W6BB NU6XB/R 442.275mHz + 103.5 ctcss UCB EE & Computer Science ARC with W6BB UCB ARC

1845 Thurs West Co Co County ARES/RACES EmComm Net 145.110 mHz (WA6KQB/R TX -600 kHz PL 82.5)

1900  Thurs KAROECHO EmComm, Preparedness & Training Net 1900 not before the West County RACES Net ends 146.415 mHz Simplex

1915 Thurs NALCO ARES/RACES (Berkeley/Albany) 440.900 mHz (TX +5 PL 131.8)

1920  Thurs  CoCo County OES County-Wide RACES Net 145.41, 147.735, &145.490 (WA6HAM Linked Repeater System TX -600 PL 107.2)

1930  Thurs Oakland ARES/RACES 146.880 mHz (repeater TX -600 PL 77)

1900  Thurs Alameda City ARES 444.575 mHz (+) 88.5 ctcss K6QLF/R

1930  Thurs Contra Costa Communications Club Net Social Session 145.110 mHz (WA6KQB/R TX -600 kHz PL 82.5)

0900  Sat Bay Area EMCOMM Net (Coastal Bay Area Counties) 0900 145.110 -600, 0915 444.275mHz +5 mHz), 0930 224.300 mHz -1.6 mHz, All PL 82.5 WA6KQB/r (Note: the 444.275 net is primarily for local CERTs, but all are invited to participate)

0710  M-F  4C's Over the Hill Net  145.110 mHz (WA6KQB/R PL 82.5- ) (rag chew net)

VHF/UHF Monthly Nets -------  

1845 First Wednesday/mo East Richmond Heights Ready to React WA6DUR/R  442.150 +5mHz, pl tone 107.2.

1200  Wed  Bay Area Hospital Net (BAHN) 4th Wednesday 147.060 mHz +600 kHz (100PL) on the MDARC W6CX Repeater

1030 Thurs Richmond EOC/Comm Center, Radio Tests First Thursdays/Mo 1030 147.450 mHz, 1045 441.000 mHz, & 1100 223.400 mHz simplex

HF Weekly Nets -------- 

1100  Mon California Emergency Services Net (CESN) 3992 kHz LSB primary or 3960 kHz LSB alternate (monitor only)

2000  Mon ACS California Emergency Services Net (CESN) 3992 kHz LSB primary or 3960 kHz LSB alternate (monitor only unless registered ACS station) California Auxiliary Communications Service (ACS

1000  Wed California Emergency Services Net (CESN) 7230 \kHz LSB Primary or 7192 kHz LSB Alternate (Mutual Aid Regions 1 through 6)

(formerly California State RACES: (Mutual Aid Regions 1 through 6).
Forum These nets are for State, County, and local government ham radio stations only.

1800  Tues Marin RACES NVIS NET: 1800 3895 kHz  LSB. Then move to 5405 kHz (ch5) USB, and lastly 7228 kHz LSB

1800 Thurs Contra Costa County HF EmComm Net 1800 7213 kHz (+/-) LSB, 1815 60m ch2 (5346.5 kHz), ch3 alt, 1830 3893 kHz (+/-) LSB

0800 Sat. 3890 kHz LSB  Bay Area Disaster Preparedness NVIS Net (formerly Bay Area Red Cross Net) 

1230  Sat-Sun  Weekend Swap Net 7240 kHz LSB LSB Every Saturday and Sunday 1230

1130  Sat-Sun   Just another Net (Jefferson Noon Time Net extension) 7204 kHz  

0800- Sun Marin County W6SG Sunday 3915 kHz LSB also at 0900 

1600 Sun NR5NN’s  60 Meter 5.332 mHz 60m CW net

1800 Sun NR5NN’s Sunday 80 Meter 3.548 mHz FRN/80m CW net

HF Daily Nets ---------- 

0830 M-F California Rescue Communications HF Net  West Coast Traffic Handling & Emergency Traffic Weather 7250 kHz LSB

1800 M-Sat  San Joaqin Net, 3918 kHz LSB

1830 Daily  California Traffic Net 3906 LSB kHz daily (California, Arizona, and Nevada) National Traffic System Net 0200 UTC

1900 Daily  Golden Bear Amateur Radio Net 3975 kHz LSB

1900 Daily  Northern California Net (NCN) 3533 kHz CW Northern California and Nevada Traffic Net Daily

2100 Daily  Northern California Net (NCN) 3533 kHz CW NCN Slow Speed CW Traffic Net Daily

1945 and 2130 Daily RN6 -- The Sixth Region Net (NTS) 3575 kHz National Traffic System California, Nevada, and Arizona

2030 Daily Western Area Net (WAN) NTS 3552 kHz (altrnative 7052 kHz) National Traffic System Area Net for RN6, RN7, and TWN nets 

1100 M-F   CARS (California Amateur Radio Service) 7250 kHz LSB CA Radio Service Website

1030 Daily The Noon-Time Net 7284 kHz LSB  Early Session -- formal at 1200 noon

1130 Daily The Noon-Time Net 3970 kHz LSB 75m Net (handles NTS radiogram traffic via liaison)

1130 M-F    Swap Net 7235 kHz +/- QRM LSB Swap Net and Rag Chew Net

1230 Sat-Sun  Weekend Swap Net 7240kHz LSB 7240 kHz LSB Weekend Swap Net Every Saturday and Sunday

1130 M-F     Jefferson Noon Net 7204 kHz early session  

0700 Daily  Group 7155 on 7155 kHz LSB Rag Chew -- All topics --

1800 Daily  Western Public Service System (WPSS) Net 3952 kHz LSB 1800 early check-in Formal Roll Call starts at 1930

2000 Daily   Mission Trail Net 3857.5 kHz, LSB  

Legacy National Traffic System/Radio Relay International System

California Traffic Net 3906 LSB kHz daily  at 1800 LSB (California, Arizona, and Nevada) National Traffic Net

Golden Bear Amateur Radio Net 3975 LSB kHz Daily 1900

Radio Relay International (Nationwide Traffic Net Directory)

Western Area Traffic Net Directory -- needs updating 

Sixth Region Net (RN6)  3575 kHz  1945 and 2045 Daily  (high speed CW)

Western Area Net (WAN)  Daily 3552 kHz at 2030  (high speed CW) Area Traffic Net for the Western United States

North West Net (NWN) 3567 kHz (CW)  Daily 2200 -- Clearinghouse net for left over traffic)

ARRL Net Directory Search

Northern California Net (NCN) Daily at 1900 on 3533 kHz CW (Northern California and Nevada Traffic)

Northern California Net (NCN) Slow Speed Net 2100 Daily 3533 kHz CW (Northern California and Nevada Traffic)  

Adjacent Alameda County Ham Frequencies and Weekly Nets 

NALCO ( Berkeley/Albany/UCB/Alta Bates Hospital) 

Frequencies ....... Offset/Tone ...... Weekly Net ....... Notes 

147.480  ....... Simplex 

224.900 ...........(-1.6Mhz) 123.0 (New PL)  ...... .Low-level ARES/RACES use (SECONDARY) 

440.900 ...........(+5MHz) 131.8. .......Net Thu 19:15 ..... Low-level ARES/RACES use (PRIMARY) 

147.2550 ......... (+600 kHz)  123,0  ...... Low Level ..... ARES/RACES use (Tactical) 

1285.55 ...........(-12MHz) 114.8 ................................ Low-level ARES/RACES use  

BEcertainn (Berkeley GMRS CERT Repeater Network)

462.725 ...........(+5MHz) 88.5 ..........Net First and Last Tues of every month 1930 ....... Low Level CERT GMRS Repeater

ORCA ( Oakland ) 

Frequency .......... Offset/Tone ........ Weekly Net ....... Notes 

146.88 ............ (-) 77.0 .................Net Thu 19:30 

442.40 ............ (+) 77.0 

147.585 ........... Simplex (PRIMARY) 

146.565 ........... Simplex (SECONDARY)


ARCA ( Alameda ) 

Frequency ........... Offset/Tone ........ Weekly Net ....... Notes 

444.575 ............ (+) 88.5 ............... Net Thu 19:00 

146.505 ............ Simplex (PRIMARY) 

146.535 ............ Simplex (SECONDARY) 

Marin Amateur Radio Society (MARS) and RACES

146.7- mHz  ........... 1930  Tues Marin RACES Primary - pl 203.5 Bahai, pl 179.9 Mt. Tam (East Peak), pl 167.9 Mt. Barnabe (Novato),  192.8 Tam West Peak (All Linked Simulcast System)

443.250 mHz ........... 1915  Tues  pl 179,9+ and 147.330 mHz pl 192.8+,  Middle Peak (both stand alone repeaters- not linked)

3895 kHz  LSB ...........  Then move to 5405 kHz (ch5) USB, and lastly 7228 kHz LSB , 1800  Tues Marin RACES NVIS NET: 1800 

3915 kHz LSB ...........  0800- Sun,  Marin County W6SG Sunday,  also at 0900 

3. Coordination with local NGOs to Aid Messenger Services 

Local running, bicycling, Scout Troops, PTAs, service organizations, Neighborhood Watch,  and Church organizations are potent resources for runners, scribes, crowd control, and CERT volunteers  within the CERT areas. Be sure to include them as a valued resource.  

4. Training in Efficient message center operations should be made available as well as FRS/GMRS and radio training classes.  Since smooth Interoperability is key, all radio frequencies should be coordinated by the KAROECHO Coordination body. 

Not only ham frequencies need to be coordinated in order to avoid interference; but also FRS/GMRS CERT frequencies. A message center model for each ICP must be established so that messages can be triaged/titrated and handed off from one service to the other be it by ham, FRS, GMRS, runner, or bicyclist. 

Cert blocks and CERT Area ICPs must be COORDINATED as to frequencies or they will interfere with each other. Interference with neighboring CERT areas such as Berkeley, Albany, and Richmond on our borders can and should be avoided, through coordination.

Role of a Neighborhood District Communications Coordinator 

A List of Relevant  HF, VHF, UHF SIMPLEX EmComm Frequencies in our area 

Link to FRS/GMRS frequencies, numeric designators, and power limitations 

El Cerrito/Kensington CERT Area Maps and Area Coordinator Contact List  

El Cerrito Kensington CERT Disaster Staging/Gathering Areas (Unfortunately this information is no longer available)

Northern California  Band Plans by NARCC  (The Northern Amateur Relay Council of California)

Northern California Coordinated Repeaters by NARCC