SJC EMCOMM Freqs
SJC1 - 147.210 + 114.8 Stockton (Stockton Pri)
SJC2 - 146.655 - 100.0 Tracy (County Pri)
SJC3 - 145.210 - 100.0 Tracy (County B/up)
SJC4 - 147.090 + 114.8 Lodi (North Pri)
SJC5 - 146.985 - 100.0 Manteca
SJC6 - 147.165 + 107.2 SDARC
SJC7 - 147.015 + 114.8 Copperopolis
SJC8 - 147.105 + 94.8 Stockton
SJC9 - 146.895 - 114.8 Mt. Oso - Disabled
SJC10 - 444.400 + 114.8 Copperopolis
SJC11 - 444.325 + 94.8 Stockton (Stockton Pri)
SJC12 - 443.825 + 107.2 Mt. Oso
SJC13 - 444.575 + 107.2 Stockton
SJC14 - 444.850 + 114.8 127.3 Tracy 
SJC15 - 444.500 + 114.8 Stockton
LLNL - 146.775 - 100.0 Livermore


TAC1 - 146.550

TAC3 - 146.535
TAC4 - 146.430
TAC6 - 156.565
TAC7 - 146.595
TAC8 - 146.445
All simplex
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N5FDL/CEVOL Repeaters

Stockton: 147.210 + N5FDL and 444.500 + K6TRK Both PL 114.8 (linked)

Copperopolis/Gopher Ridge: 147.015 + and 444.400 +  (not linked) N6GKJ 

Mt. Oso: 146.895 - N5FDL and 443.825 + PL 107.2 (not linked)

Tracy: 444.850 + KB6EMK PL 127.3

Affiliated Repeaters

Bear Mtn.: 146.090 + and 444.250 + WB6ASU Both PL 114.8 (linked)

Mt. Delux: 145.210 - PL 100.0 WA6SEK (10mi S of Tracy)

All repeaters are open to all users.

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Saturday
Dec032016

Choosing a PL tone for your repeater

I was recently asked how a new repeater operator should choose a PL tone for a new machine. My comments are specific to Northern California, your local situation may vary.

  1. No assigned tones — We do not assign PL tones here in Northern California. Some places, however, may coordinate both frequency and tone.
  2. Pick a tone that isn’t being used. A good way to test for conflicts is to connect a radio to the repeater antenna and transmit on the frequency you are seeking, changing the PL tone every time you transmit. This ought to find repeaters on your frequency as well as the tones used to access them.
  3. Do the same for the repeater pairs one above and one below your desired pair. Why risk interference when it can be avoided?
  4. Check with your coordinator to make sure you haven’t missed repeaters. In Northern California, you can do this online at the www.narcc.org website. I don’t trust the RF Finder database and app for any purpose. Just too inaccurate.
  5. Yes, you should transmit a tone and your users should use it — Sometimes VHF and even UHF signals propagate over long distances. When this happens, users will unexpectedly hear another repeater on “your” frequency. Transmitting a PL tone (the same as the tone used to access your repeater) goes a long way to solving this on-channel interference issue.

There is probably more to this than I have talked about. So leave questions or comments and I will answer them and then change this post to reflect the new information.

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