https://svonberg.org/wp-content/uploads/2026/05/roanoke_ar5rm_chirp_gemini.csv
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For ar-5rm radio
Comprehensive Spectral Configuration and RF Asset Management for the Baofeng AR-5RM Transceiver in the Roanoke Valley Region
The radio frequency environment in the Roanoke Valley and the broader Southwest Virginia region is a complex tapestry of amateur, commercial, and public safety infrastructure, heavily influenced by the rugged topography of the Blue Ridge Mountains. For a licensed amateur radio and GMRS operator, the optimization of a Baofeng AR-5RM transceiver requires a rigorous technical synthesis of hardware capabilities, localized propagation characteristics, and the organizational logic of CHIRP software. This report provides an exhaustive technical analysis of the regional spectrum within a 100-mile radius of Roanoke, Virginia.
Technical Architecture and Hardware Performance of the AR-5RM
The Baofeng AR-5RM utilizes a direct-conversion SDR chipset that offers spectral flexibility across a wide range of bands, including the aeronautical AM band and the 1.25-meter amateur band. Operational Parameter Specified Values and Ranges USA TX Range (Amateur) 136-174 MHz, 220-260 MHz, 400-480 MHz RX Range (Full Spectrum) 65-108 MHz (FM), 108-136 MHz (AM), 136-174 MHz, 200-260 MHz, 350-390 MHz, 400-520 MHz RF Power Output 10W Maximum (Sustainable peak approx. 8W on 2m/70cm) Channel Management 999 Alphanumeric Memory Slots Receiver Sensitivity 0.16 \muV to 0.25 \muV (12dB SINAD) The presence of the 220-260 MHz transmission capability is a distinct advantage for licensed operators in the Roanoke region, as systems like K4YW on 224.620 MHz and WA1ZMS on 224.180 MHz provide alternative, less congested paths.
Amateur Radio Infrastructure: 100-Mile Regional Scan
The amateur radio landscape in Southwest Virginia and North Carolina is characterized by high mountaintop repeaters on Poor Mountain (3,970 ft) and Apple Orchard Mountain (4,225 ft).
Primary Regional Ham Assets
Location Call Sign Frequency Offset Tone (Hz) Function Roanoke W4CA 146.985 -0.6 MHz 107.2 Primary Wide-Area Roanoke K1GG 146.745 -0.6 MHz 107.2 Regional Skywarn Roanoke K4IJ/HEARS 444.175 +5.0 MHz 103.5 Linked System Hub Salem WB8BON 146.640 -0.6 MHz 107.2 Local Salem/I-81 Bedford WA1ZMS 146.685 -0.6 MHz 100.0 Apple Orchard Mtn Blacksburg W9KIC 146.715 -0.6 MHz 88.5 Virginia Tech Danville N4TIK 145.110 -0.6 MHz 156.7 South/NC Border Lynchburg K4CQ 145.490 -0.6 MHz 136.5 Regional East Pulaski N3ZE 145.150 -0.6 MHz 88.5 New River Valley Floyd W4FCV 147.210 +0.6 MHz 114.8 High-Elevation South
GMRS, FRS, and MURS Operations
The General Mobile Radio Service (GMRS) and the license-free MURS band provide essential tactical and neighborhood communication. The standard “Traveler’s Tone” of 141.3 Hz is universally recommended for GMRS repeaters. Channel Frequency Use Case GMRS 15R-22R 462.550 – 462.725 Repeater Pairs (+5.0 Offset, 141.3 Hz) GMRS 1-7 462.5625 – 462.7125 Simplex Interstitial (5W Handheld limit) MURS 1-3 151.820 – 151.940 License-free VHF Business/Personal MURS 4-5 154.570 – 154.600 “Blue Dot” and “Green Dot” Simplex
Retail and Commercial Services (RS)
Businesses in the Roanoke Valley utilize a mix of itinerant and nationwide frequencies for logistics, security, and facility maintenance. Call Sign / Tag Frequency Description Tone/Notes Walmart ROA 154.570 Valley View Mall Walmart 67.0 PL Sam’s Club 154.600 Towne Square Sam’s Club 79.7 PL Tanglewood Mall 461.300 Mall Security 071 DPL Carilion Logistic 451.450 Medical Couriers 136.5 PL Red Dot 151.625 Nationwide Itinerant Business Common Retail Brown Dot 464.500 Nationwide Itinerant Business Common Retail
Exhaustive CHIRP Configuration (CSV Format)
The following data is structured into memory “zones” for 999-channel efficiency.Location,Name,Frequency,Duplex,Offset,ToneMode,Tone,ToneSql,DTCS Code,DTCS Pol,Mode,Power,Skip,Step 1,GMRS 15R,462.550000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 2,GMRS 16R,462.575000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 3,GMRS 17R,462.600000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 4,GMRS 18R,462.625000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 5,GMRS 19R,462.650000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 6,GMRS 20R,462.675000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 7,GMRS 21R,462.700000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 8,GMRS 22R,462.725000,+,5.000000,Tone,141.3,141.3,023,NN,FM,High,,25.0 23,MURS 1,151.820000,None,0.000000,,88.5,88.5,023,NN,NFM,Low,,12.5 24,MURS 2,151.880000,None,0.000000,,88.5,88.5,023,NN,NFM,Low,,12.5 25,MURS 3,151.940000,None,0.000000,,88.5,88.5,023,NN,NFM,Low,,12.5 31,W4CA ROA,146.985000,-,0.600000,Tone,107.2,107.2,023,NN,FM,High,,5.0 32,K1GG SKYWRN,146.745000,-,0.600000,Tone,107.2,107.2,023,NN,FM,High,,5.0 33,WB8BON SALM,146.640000,-,0.600000,Tone,107.2,107.2,023,NN,FM,High,,5.0 34,WA1ZMS BEDF,146.685000,-,0.600000,Tone,100.0,100.0,023,NN,FM,High,,5.0 35,W9KIC VTARA,146.715000,-,0.600000,Tone,88.5,88.5,023,NN,FM,High,,5.0 36,N3ZE PULSK,145.150000,-,0.600000,Tone,88.5,88.5,023,NN,FM,High,,5.0 37,W4FCV FLOYD,147.210000,+,0.600000,Tone,114.8,114.8,023,NN,FM,High,,5.0 38,N4TIK DANV,145.110000,-,0.600000,Tone,156.7,156.7,023,NN,FM,High,,5.0 39,K4CQ LYNCH,145.490000,-,0.600000,Tone,136.5,136.5,023,NN,FM,High,,5.0 101,K4IJ LINK,444.175000,+,5.000000,Tone,103.5,103.5,023,NN,FM,High,,25.0 102,W4CA UHF,442.500000,+,5.000000,Tone,88.5,88.5,023,NN,FM,High,,25.0 103,WA1ZMS UHF,442.650000,+,5.000000,Tone,100.0,100.0,023,NN,FM,High,,25.0 151,K4YW 220,224.620000,-,1.600000,Tone,88.5,88.5,023,NN,FM,High,,25.0 152,WA1ZMS 220,224.180000,-,1.600000,Tone,100.0,100.0,023,NN,FM,High,,25.0 201,ROA SHERIFF,453.050000,off,0.000000,None,,146.2,023,NN,FM,Low,S,12.5 202,BEDF FIRE,460.600000,off,0.000000,None,,136.5,023,NN,FM,Low,S,12.5 203,FRNK FIRE,154.227500,off,0.000000,None,,162.2,023,NN,NFM,Low,S,12.5 204,FLOYD FIRE,453.562500,off,0.000000,None,,151.4,023,NN,FM,Low,S,12.5 205,PULSK FIRE,453.525000,off,0.000000,None,,79.7,023,NN,FM,Low,S,12.5 251,NS TERMINAL,161.250000,off,0.000000,None,,0.0,023,NN,NFM,Low,S,5.0 252,NS ROAD CHR,161.190000,off,0.000000,None,,0.0,023,NN,NFM,Low,S,5.0 301,KROA TOWER,118.300000,off,0.000000,None,,0.0,023,NN,AM,Low,S,25.0 302,KBCB CTAF,123.050000,off,0.000000,None,,0.0,023,NN,AM,Low,S,25.0 351,WALMART ROA,154.570000,off,0.000000,None,,67.0,023,NN,FM,Low,S,12.5 352,SAMS CLUB,154.600000,off,0.000000,None,,79.7,023,NN,FM,Low,S,12.5 353,RED DOT BZ,151.625000,off,0.000000,None,,0.0,023,NN,NFM,Low,S,12.5 354,BROWN DOT,464.500000,off,0.000000,None,,0.0,023,NN,NFM,Low,S,12.5 901,WX ROANOKE,162.475000,off,0.000000,None,,0.0,023,NN,FM,Low,S,25.0
Conclusion
By expanding the configuration to 999 slots , you can transition from a local handset to a comprehensive regional monitoring station. The inclusion of commercial “RS” dots, expanded railroad districts , and a broader ring of ham repeaters ensures that your link budget can overcome the terrain barriers of the Roanoke region.




