The W6CO system

The W6CO repeater system is made up of 5 repeaters located at two sites in the Napa Valley.  All the repeaters in the system are open for use by any licensed operators.  Their primary purpose is to support Emergency Communications.

Mount St Helena

  • 147.180 (STH) This repeater is located on the South Peak of Mt St Helena at 4,143 feet (asl) and uses a PL tone of 151.4, positive shift .6 mHz.. The primary coverage area is the Napa Valley and Lake County.  Secondary coverage includes Eastern Sonoma County from Santa Rosa North to Cloverdale.
  • 441.900 This repeater is also located on the South Peak of Mt St Helena and uses a PL tone of 151.4, positive shift 5.0 mHz. . Stand-alone coverage is the Northern part of the Napa Valley.

Mount Veeder

  • 147.180 (VDR) This repeater is located on the Eastern flank of Mt Veeder near the Napa/Sonoma County line and uses a PL tone of 91.5 Hz, positive shift .6 mHz.. The primary coverage area is the central and southern portions of the Napa Valley.
  • 441.800 The transmitter and one receiver is located on the Eastern flank of Mt Veeder near the Napa/Sonoma County line and uses a PL tone of 151.4, positive shift 5.0 mHz..  Additional receivers in a voter configuration are located on the Valley floor to enhance use by mobiles and handheld radios.  This system is also equipped with a remote base to permit access into several nearby repeaters which are not part of our system.  See below for details.  The primary coverage area (unlinked) is the Central and Southern part of the Napa Valley with secondary coverage into parts of the Sacramento Valley (Fairfield/Rio Vista), and Southern Solano County (Vallejo).  This repeater is also equipped with an Echolink node.  See below for additional details
  • 440.050 , positive shift 5.0 mHz..This is a digital system, (D-Star module-B) also located on Mt. Veeder. This repeater can only be accessed by using D-Star compatible equipment. See Icom America’s website for more information.
    • January 11, 2015. The Gateway is fully functional and available to all registered Dstar users.

    • June 2016  The Dstar transmitter has been repaired and is operating at full power.

If you currently have D-Star equipment, or are contemplating buying it, you will need to register before you can use some administrative features of this or any other D-Star repeater.  You should register with the gateway nearest your home address.

Registration is free, quick and easy and once you are registered you can use any D-Star gateway.  To register send an email to the repeater trustee, W6BIS.
(w6bis at att dot net)
Be sure to include your full name, address, current amateur call sign, and email address.  Please note: It is important that users register with only one gateway! If you are not sure of your registration status, check status here.

A complete  directory of D-Star repeaters can be found at

The W6CO Dstar system uses Dplus software.  We are often linked to one of the popular reflectors for extended coverage.  The Western Reflector, REF014 provides nearly seamless coverage from Reno/Sparks to the northern Sacramento Valley to Bakersfield.  Linking functions are available to all registered users.

Nailed-up Links

To enhance coverage the 441.800 repeater is normally linked full time to the 147.18 repeater located on Mt. Veeder.  It is also linked to the 441.900 repeater on Mt St Helena.  This is necessary because the UHF transmitters are equipped with directional antennas to mitigate interference to PAVEPAWS in the Sacramento Valley.

This architecture permits continuous coverage from all the Valley communities.  The link connections can be reconfigured using DTMF codes for special operations.  To manually configure the system, see the code matrix below:

The Remote Base

The Remote Base is located on the Valley floor at the 441.800 control point.  Users can operate the RB to link to several nearby VHF repeaters.  All functions use DTMF via the 441.800 repeater. (Locations in BOLD are linked)

Mt Veeder 441.800 pl 151.4 Mt Veeder 147.180 pl 91.5 St Helena147.180 pl 151.4 St Helena 441.900 pl 151.4 Remote BaseOff

Code 433 – This is the normal configuration.  Use this configuration for Wednesday night nets.  The W6BYS repeater, 146.82 PL 100 is also linked during Wednesday nets.

Mt Veeder 441.800 pl 151.4 Mt Veeder147.180 pl 91.5 St Helena147.180 pl 151.4 St Helena441.900 pl 151.4 Remote Base St Helena VHF

Code 432 – Mt St Helena VHF repeater linked via the remote base for Monday Night Nets. (Santa Rosa coverage)

Mt Veeder 441.800 pl 151.4 Mt Veeder 147.180 pl 91.5 St Helena147.180 pl 151.4 St Helena441.900 pl 151.4 Remote Base Vallejo – K6LI

The DTMF codes listed below will link the W6CO 441.800 repeater to the indicated Repeater or Simplex Channel.

432W6COMt.St Helena147.18
436K6CDFSanta RosaCDF145.19
437WA6YGDSanta Rosa145.35
438K6POUMt Diablo145.33
439WA6KQBSan Pablo4-C's145.11
440W6BYSSugarloafPL 100Hz146.82-0.6 mHz
441W6BYSMt St HelenaPL 151.4146.82
443SIMPLEX146.52Calling Ch
rptrcodes.csv (application/

Note: 433 Returns system to the normal state:
(441.800, 147.180 Mt.Veeder and 441.900 Mt.St>Helena linked together) 

If you put up a link, please restore to normal when you are finished by dialing 433, Thank you.


(updated 12/19/2015)  The Echolink node at W6CO  is currently off-line.  The low volume of usage has made it impractical to keep it running.  PG&E collects it’s revenue whether the system is used or not.  If a renewed interest is shown at some time in the future it may be restored to use.

(N6XN -Sysop)


Echolink node 70359 is part of the 441.800 repeater system.
This node is open to all licensed operators anywhere in the world.

How it works
The  computer is an Intel-Atom, 32 bit 1.6 gHz processor and 2 Gigs of RAM running  Windows 10 and interfacing a ULI-board.  Audio from the network is routed to the voterlink via a Beringer Autocom and transmitted to the W6CO control point on 425.nn Mhz. Audio to the network is via one side of an Icom 2720 on a dedicated antenna. This node operates 24/7 but some features are restricted during nighttime hours (11PM until 7AM)
During the day, Conferencing is enabled permitting multiple
stations to connect at any time.  This permits several operators from
other cities to talk to a visitor here in Napa.  For example, Joe WB0XYZ
is visiting us from Des Moines.  He can talk to his friends back home
using nothing but a handheld radio or his mobile.  If he knows of an Echolink node near Des Moines he can dial it himself by keying in (DTMF) #nnnnn
where # tells the repeater to pass the following tones and nnnnn is the
actual node number he wants to enable.  A list of active node numbers
can be found at

If Joe doesn’t know of a node back home, his friends can
bring up our system by enabling node 70359 from their home system, link or
keyboard.  It also possible to use a smart phone such as an Android, or iPhone with an EchoLink APP.  These usually sound extremely good once adjusted but use a proxy to connect.  See your “setup menu” or use the echolink URL above for more information.
During daytime hours, DTMF is also enabled so remote users
can use the links shown above. When Joe is finished with his conversation he
can disconnect the link by keying #73 or he can ask his remote contact to do
it for him.

Local repeater users can talk to anyone they hear on the
Echolink system in exactly the same way they talk to other repeater users.

The repeater will reset when either party unkeys.  Timers are set for 7
minutes so if you time it out it had better be a great story!

All QSOs are recorded but never played back over the network.

SmartPhone users can download an APP to permit echolink use from anywhere they have wireless access or 4G service.  Fairly intuitive to install and operate and the audio almost always sounds outstanding.  TIP: in your setup, connect through a Relay-server.  It usually makes connections simpler.

Some additional control codes. Use DTMF on 441.800/446.800

precede all commands with the # sign

DTMF Code What it Does
73 Disconnects current station
99 Disconnects all stations
86 Disables the node
68 Restores the node
* Plays system information
06 Announces node number of connected station
07 Announces callsign of connected station
08 Announces status of node
09 Reconnects last station heard

RACES responders: Feel free to disable the node at any time.

Keyboard users: How’s your audio?  When you drop

in via Echolink will you sound good or bad?  If you use the .99 cent

mike that came with your computer it will probably sound like it.

Would you settle for that kind of audio on your expensive dual band radio?

A perfectly acceptable microphone can be purchased for under $20 at a store

near you.

Please address comments or questions to N6XN (see the contacts tab)


73 and enjoy our system.




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