Amateur Radio Frequencies

Popular Amateur Radio frequencies in and around Harford County, Maryland

Harford County, MD

  • 145.330 (-) no tone (Shawsville) (K3HT) (coverage map)
  • 146.595 (simplex) (NEMARC)
  • 146.775 (-) tone 146.2 (Forest Hill) (KC3FHC)
  • 444.150 (+) tone 131.8 (Havre de Grace) (N3KZ) active
  • 449.375 (-) no tone (Shawsville) (W3EHT)
  • 449.775 (-) tone 162.2 (Forest Hill) (KC3FHC)

Digital D-STAR D-STAR

  • 145.120 (-) KC3FHC C (DV) (Forest Hill) linked to REF062C
  • 447.9875 (-) KC3FHC B (DV) (Forest Hill) linked to REF062C
  • 1282.300 (-) KC3FHC A (DV) (Forest Hill)
  • 1248.100 (simplex) RPS, D-STAR Data (DD) (Forest Hill)

Baltimore County, MD

  • 53.470 (-) tone 107.2 (Catonsville) (N3KTX)
  • 145.190 (-) tone/TSQL 110.9 (Cockeysville) (K3NXU)
  • 145.330 (-) no tone (Shawsville, Harford Co) (K3HT)
  • 146.670 (-) tone 107.2 (Towson) (W3FT)
  • 147.030 (+) tone 156.7 (Baltimore) (BRATS)
  • 147.240 (+) output tone 123.0 (Essex) (W3PGA) C4FM System Fusion
  • 147.345 (+) tone 127.3 (Dundalk) (N3HIA)
  • 223.840 (-) no tone (Parkville) (W3JEH)
  • 224.680 (-) no tone (Baltimore) (KS3L)
  • 224.960 (-) no tone (Baltimore) (BRATS)
  • 443.350 (+) no tone (Randallstown) (BRATS) C4FM System Fusion
  • 448.325 (-) no tone (Baltimore) (BRATS)
  • 448.675 (-) tone 91.5 (Dundalk) (sk, future status unknown)
  • 449.575 (-) output tone 123.0 (Essex) (W3PGA) C4FM System Fusion
  • 449.625 (-) tone 107.2 (Towson) (W3FT)
  • 449.675 (-) tone 167.9 (Timonium) (N3ST) CMRG network

Digital D-STAR D-STAR

  • 145.140 (-) W3DHS C (DV) (Towson) linked to REF025B
  • 442.1125 (+) W3DHS B (DV) (Towson) linked to REF062C
  • 1282.700 (-) W3DHS A (DV) (Towson)
  • 1248.300 (simplex) W3DHS D (Towson)

Digital MOTOTRBO DMR DMR Digital Mobile Radio

  • 443.850 (+) color code 6 (Towson) (more info)

Amateur Television (ATV) Repeaters

Packet Nodes Digital Packet

  • 145.050 (W3GXT-5) (BRATS)
  • 224.520 (W3GXT-10) (BRATS)

Cecil County, MD

  • 53.830 (-) tone 94.8 (Port Deposit) (WA3SFJ)
  • 145.250 (-) tone/TSQL 131.8 (Elkton) (KX3B) C4FM System Fusion
  • 145.470 (-) tone 127.3 (Charlestown) (N3RCN)
  • 146.850 (-) tone 107.2 (Port Deposit) (WA3SFJ) Echolink 585690
  • 442.950 (+) tone 103.5 (Charlestown) (N3RCN)
  • 449.825 (-) tone 167.9 (Port Deposit) (WA3SFJC4FM System Fusion

Kent County, MD

  • 147.375 (+) tone 156.7 (Worton) Echolink 249466
  • 449.175 (-) tone 156.7 (Chestertown) (K3ARS) C4FM System Fusion

Packet Nodes Digital Packet

  • 145.090 1200b Winlink gateway (Rock Hall) (K3ARH-10)
  • 145.090 1200b Winlink gateway (Chestertown) (K3ARS-10)
  • 441.000 9600b Winlink gateway (Chestertown) (K3ARS-15)

Queen Anne’s County, MD

  • 146.940 (-) tone 107.2 (Centerville) (KE3AO) (QAARC)
  • 448.225 (-) tone 107.2 (Centerville) (KE3AO) (QAARC)

Carroll County, MD

  • 53.090 (-) tone/TSQL 107.2 (Westminster) (K3PZN)
  • 145.410 (-) tone/TSQL 114.8 (Westminster) (K3PZN)
  • 146.895 (-) no tone (Manchester) (N3KZS)
  • 147.285 (+) no tone (Sykesville) (K3PZN)
  • 449.875 (-) tone/TSQL 127.3 (Westminster) (K3PZN) C4FM System Fusion

Howard County, MD

  • 147.135 (+) tone/TSQL 156.7 (Columbia) (K3CUJ) C4FM System Fusion
  • 147.390 (+) tone 156.7 (Cooksville) (K3CUJ) C4FM System Fusion
  • 448.275 (-) tone 156.7 (Columbia) (K3CUJ)
  • 449.475 (+) tone 156.7 (Columbia) (K3CUJ) full time C4FM C4FM System Fusion

Anne Arundel County, MD

  • 146.760 (-) tone 107.2 (Jessup) (WA3DZD)
  • 146.805 (-) tone 107.2 (Millersville) (W3CU)
  • 147.075 (+) tone 107.2 (Glen Burnie) (W3VPR)
  • 147.105 (+) tone 107.2 (Davidsonville) (W3VPR)
  • 223.880 (-) tone 107.2 (Davidsonville) (W3VPR)
  • 224.560 (-) tone 107.2 (Millersville) (W3VPR)
  • 442.300 (+) tone 107.2 (Annapolis) (KB3CMA) Echolink 90911 C4FM System Fusion
  • 442.400 (+) tone 100.0 (Millersville) (KP4IP) Echolink 587842 C4FM System Fusion
  • 442.500 (+) tone 156.7 (Laurel) (W3LRC)
  • 442.600 (+) tone 127.3 (Glen Burnie) (N3MIR)
  • 444.400 (+) tone 107.2 (Davidsonville) (W3VPR)
  • 449.125 (-) tone 107.2 (Millersville) (W3CU)

Packet Nodes Digital Packet

  • 145.010 1200b Winlink gateway (Glen Burnie) (W3AAC-10)

New Castle County, DE

  • 146.700 (-) tone 131.8 (Newark) (W3DRA) C4FM System Fusion
  • 146.730 (-) tone 131.8 (Wilmington) (W3DRA)
  • 146.955 (-) tone 131.8 (Wilmington) (WA3UYJ) C4FM System Fusion
  • 224.520 (-) tone 131.8 (Wilmington) (W3DRA)
  • 448.375 (-) tone 131.8 (Wilmington) (W3DRA)
  • 449.025 (-) tone 131.8 (Newark) (W3DRA) C4FM System Fusion

York County, PA

  • 146.700 (-) tone/TSQL 114.8 (Shrewsbury) (K3AE) C4FM System Fusion
  • 146.865 (-) tone 123.0 (Red Lion) (W3ZGD)
  • 146.925 (-) tone 74.4 (York) (W3WAN) Allstar 27705
  • 146.970 (-) tone 123.0 (York) (W3HZU) Broadcastify
  • 147.330 (+) tone 123.0 (Hanover) (W3MUM)
  • 442.050 (+) tone 131.8 (York) (N3KZ)
  • 444.250 (+) tone 146.2 (York) (W3SBA) Allstar 27784
  • 447.275 (-) tone 123.0 (York) (W3HZU)
  • 449.725 (-) tone 123.0 (Shrewsbury) (K3AE)

Lancaster County, PA

  • 145.230 (-) tone 118.8 (Manheim) (SPARC)
  • 145.310 (-) tone 118.8 (Lancaster) (N3FYI)
  • 145.390 (-) tone 118.8 (Cornwall) (W3AD)
  • 145.450 (-) tone 100 (Ephrata) (EARS)
  • 146.745 (-) tone/TSQL 114.8 (Holtwood/Buck) (KX3B) C4FM System Fusion
  • 147.015 (+) tone 118.8 (Lancaster) (W3RRR) Echolink 380019
  • 224.320 (-) tone 114.8 (Lancaster) (N3FYI)
  • 224.440 (-) tone 131.8 (Lititz) (KA3CNT)
  • 224.780 (-) tone 151.4 (Buck) (AK3E)
  • 224.820 (-) tone 114.8 (Cornwall) (N3TPL)
  • 442.150 (+) tone 131.8 (Cornwall) (W3BXW)
  • 443.250 (+) no tone (Manheim) (SPARC)
  • 444.650 (+) tone 131.8 (Ephrata) (EARS)
  • 446.475 (-) tone 114.8 (Rawlinsville) (N3FYI) Allstar 28989 C4FM System Fusion
  • 448.175 (-) tone 94.8 (Quarryville) (N3EIO)
  • 448.625 (-) tone 114.8 (Holtwood) (N3TPL)C4FM System Fusion
  • 449.025 (-) tone 162.2 (Cornwall) (W3AD) C4FM System Fusion
  • 449.225 (-) tone 131.8 (Lancaster) (KA3CNT)
  • 449.275 (-) tone 114.8 (New Holland) (N3FYI) C4FM System Fusion
  • 449.325 (-) tone 173.8 (Lancaster) (KA3CNT)C4FM System Fusion
  • 449.525 (-) tone 114.8 (Georgetown) (KB3ZGE)
  • 449.575 (-) tone 114.8 (Lancaster) (W3RRR) C4FM System Fusion
  • 449.975 (-) tone 114.8 (Manheim) (SPARC)
  • 927.5875 (-) tone 114.8 (Cornwall) (N3TUQ)

Chester County, PA

  • 146.940 (-) tone 131.8 (West Chester) (W3EOC)
  • 445.675 (-) tone 131.8 (Paoli) (W3JOE) C4FM System Fusion
  • 446.525 (-) tone 100.0 (West Chester) (W3EOC)

Digital D-STAR D-STAR

  • 146.490 (+) W3EOC C (DV) (Pocopson)
  • 445.06875 (-) W3EOC B (DV) (Pocopson)
  • 1255.500 (+) W3EOC A (DV) (Pocopson)
  • 1299.500 (simplex) W3EOC D-STAR Data (DD) (Pocopson)
  • 445.08125 (-) KB3SRL B (Bucktown)
  • 1255.600 (+) KB3SRL A (Bucktown)
  • 1297.500 (simplex) KB3SRL D-STAR Data (DD) (Bucktown)
  • 440.00625 (+) KB3SLS B (Charlestown)
  • 1255.700 (+) KB3SLS A (Charlestown)
  • 1297.900 (simplex) KB3SLS D-STAR Data (DD) (Charlestown)

Region-Wide Radio Networks

VoIP / Digital Networks

Notes

System Fusion AMS: Most System Fusion (C4FM) repeaters in this list operate under automatic mode select (AMS). This means they can re-transmit both analog FM and digital, depending on what is input. Listening to a Fusion repeater in digital mode, while using an analog radio, sounds like killer bee swarm static.

Automatic Mode Select: “This function instantly recognizes whether the received signal is C4FM digital or conventional FM. The communication mode automatically switches to match the received mode. Even if a digital signal is being used, you can switch to FM communication if radio signals are received from a FM station.”

Note – a control operator may set the repeater to fixed digital mode, especially during digital-only nets or special operations.

FM Analog Users On Fusion Repeaters: Some Fusion repeaters provide an outgoing tone squelch (TSQL) during FM transmit.  Program this into your radio so you hear FM analog only.  This way, if the repeater is re-broadcasting digital you will not hear it.  Win!

Caveat Emptor: Data on this page is sourced from club/organization websites, published files or repeater lists, and online directories like RepeaterBook. Most entries are personally verified working by myself (KB3KAI) where possible.  “Closed” systems are intentionally omitted. Accuracy and completeness may vary.

Send corrections/additions to David Stansbury, KB3KAI

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