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40.175 MHz FM Carrier (Data Link?) 40.170 MHz 40.180 MHz 118.8 Hz - Unknown Source VHF Low DX

26 April 2023 band opening sporadic-E band conditions 40 MHz band DX band open to South America. 40.175 MHz. Previously noted similar transmissions on 40.125 MHz 40.1250 MHz FM 40.120 MHz 40.130 MHz 40.170 MHz 40.430 MHz 40.300 MHz 40.30 FM 40.000 MHz military 40-42 MHz band military radio frequencies frequency 30.2 MHz 30.2000 MHz 30,200 MHz 38.325MHz 38.525MHz 36.100 MHz 36.250 MHz 35 MHz band Could be military radio link, a VHF radio datalink, somebody leaving the transmitter on accidentally, some sort of DF (ADF) HF/DF VHF/DF direction-finding exercise beacon radio beacon VHF radio beacon homing beacon 30-50 MHz beacon 36.600 MHz like the YSD beacon on 36.6 MHz and other military temporary beacons on VHF band VHF radio band 40MHz band 40.675MHz 40.075 MHz 40.070 MHz 40.071 MHz 40,071 40.675 Beacon 8m band 4m band 70MHz 28MHz early warning 25MHz band 25.950 MHz 48.975 MHz 49.425 MHz VHF low band paging pager systems 35MHz band 43MHz band Brazilian radio pirates Cuban two way radio comms 33.425 MHz 33.420 MHz 33.275 MHz 27.5000 MHz 27.5 MHz 39.5 MHz 39MHz band 25-30 MHz band 26-28 MHz 11m band 11 meter band 10m band 28.275 MHz 28.005 MHz 28.085 MHz 28.525 MHz 28.405 MHz 28.305 MHz 28.415 MHz 28.315 MHz 28.320 MHz 29.699 MHz 29.995 MHz 30.000 MHz 31.1 MHz 33.9 MHz 46.70 MHz 45.6 MHz 45.200 MHz 44.740 MHz 42.420 MHz 42.500 MHz 40.500 MHz 40-42 MHz band 30.000 MHz 30.550 MHz 30.575 MHz 30.5800 MHz 30.58 MHz 31.12 MHz 31.14 MHz 31.440 MHz 31.240 MHz 33.100 MHz 33.440 MHz 33.460 MHz 38.2750 MHz FM 38.850 MHz 30.300 MHz 30.7750 MHz 29.875MHz 29.750 MHz 28.875 MHz Russian taxi QRM on 10 meters 28MHz band full of CIS taxis FM mode 28.265 MHz 28.335 MHz 28.555 MHz 28.755 MHz 28.775 MHz 28.725 MHz 28.825 MHz 28.875 MHz 28.925 MHz 28.900 MHz 28.400 MHz USB 28.375 MHz 28.085 MHz 28.075 MHz 29.725 MHz 29.600 MHz FM 29.625 MHz 29.620 MHz QRM 29.000 MHz 29.010 MHz 29 MHz AM 29.0 MHz 51.00 MHz 51.0mc PRC-77 RT-841 radiotelephone 60-80 MHz 60-80mc voice radio TBS radio circuit Possibly a malfunctioning transmitter. 40.175 MHz 40.1750 MHz 40.175MHz 40.17 MHz 40.18 MHz 40.180 MHz 40.170 MHz 40.1700 FM 40.1800 FM data 40 MHz band 8m band 40.665 MHz 40.675 MHz 40.685 MHz 40.695 MHz 40.670 MHz SNOTEL 41.950 MHz 41.95 MHz FM 41.90 41.1000 MHz FM carrier 118.8 Hz tone 150.0 Hz 40-42 MHz military band 40.000 MHz 42.000 MHz 40.5 MHz guard 40.500 FM 40.50 MHz 41.750 MHz 41.71 MHz 36.25 MHz 36.400 MHz 36.500 MHz 74.4 Hz tone 151.4 PL 118.8 123.0 127.3 131.8 141.3 165.5 136.5 173.8 MHz 38.325 MHz 38.9 FM 38.900 MHz 38.500 MHz Range Control 38.5 FM 38.5000 150.0 PL Range Control 37.100 MHz RANGE CTRL BLACKBURN 35.750 MHz 36.0 MHz 47.000 MHz military 41.950 MHz 49.900 MHz Repeater relay RETRANS For Whom The Bell Tolls Creeping Death Thunder Run Thunder Runs tank M1A1 M1A2 M16A1 M4A2 flash hider 14.5” twist rate for 5.56 NATO SS109 M855 M855A1 M80 ball M80A1 ball M110 LR 7.62x51 7.62 NATO 5.56x45mm 5.56 NATO 7.62x54R 7.62x54mmR Rimmed 7.65x53 7.92mm 7.62x39 Russian manufactured 7.62x54R availability Mosin-Nagant M1906 specification light ball L.C.B. Factory 188 LVE Low Voltage Equipment Novosibirsk cartridge factory 200 grain Extra Match 7.62x54R Three Line Rifle model 1891 model 1891/30 91/30 91-30 1891/30 rifle bolt action .308 Winchester .308 power .30-06 .30-03 .270 .270 Winchester Savage 110 rifle Ukraine war 7mm-08 7x57 7x64 6.5mm 6.5x55 6.5mm Creedmoor 6mm Creedmoor 7.62 NATO .300 Win Mag Winchester Magnum SVD rifle .338 caliber 8.6mm 6.8mm 6.9mm 7mm class cartridges 6.9x63mm 7x63mm 7.62x63mm .30-06 Springfield long-action short-action cartridges AR-10 rifles C308 PTR-100 PTR-32 7.62x39mm Ruger American Rifle Scout Rifle Concept Savage Axis II Mossberg Winchester Remington .280 caliber .27 .276 .275 Rigby