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Civil Air Patrol
The Civil Air Patrol (CAP), an auxiliary of the U. S. Air Force,
has conducted several drills on the two frequencies attributed to them , CH 1 148.150 and CH 2 148.125, with a PL for the New Hampshire wing of 136.5 hz ( Mass Wing and others may us the PL tone of 100.00 hz) this past month in Southern New Hampshire. Yesterday is the first time received traffic on 148.125 simplex here in New Hampshire. This is in addition to CAP missions, going out on the occasional search for Emergency Locator Beacon., that have come up on the air on 148.15 repeater, over the past several years. I do not have the VHF-AM air band allocations for the CAP in any of my radios and when they were entered into the radios didn't hear much on the air band form the folks in CAP. I will be loading those CAP AM air band SAR frequencies which are readily available at different sites on the web, into the ICOM IC R-2 to see if they may have search and rescue mission or drill traffic along with what's coming across the CAP VHF-FM channels. These two CAP frequencies also are heavily used at air shows. They seem to be in the "repeater talk around" simplex mode. Along with FRS Handy Talkies. Checking the FRS band when hearing activity on the "official" CAP channels may yield other communications, the CAP Cadets and their adult officers appear to use FRS radios. The FRS band is a good place to check for other groups like scouts and Law Enforcement- Fire Explorers, too. Nothing has shown up on the 390 MHz-FM Military (FRS like) intersquad band. This 14 channel UHF-FM band has been checked over the last two air show seasons! Jim |
#3
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CAP uses 100.0 hz PL as a nationwide standard. All CAP repeaters have to
respond to this tone but it is only to be used by low power portables (less than 6 watts with internal antennas) and when out of your home area. Each repeater also has a normal tone (one of the 32 standard PL tones) which is what you will normally hear. Some CAP repeaters do not tranmsit PL tone but do require it before repeating. CAP uses 148.1375 as a Ground channel and 149.5375 as Air-Ground. Both of these are supposed to transmit 100.0 hz also but some radios may not be programmed correctly. CAP still has 26.620 but it is little used. They also have several HF freqs from 2 to 14 MHz and these are used for long range communications in USB. Finally, CAP also has some "inter-squad" radios. These are basically the same as FRS except they are on federal freqs right around 400 MHz. Oh yeah, CAP also operates practice ELTs on 121.775 for training. Steve Silverwood wrote in k.net: In article , says... The Civil Air Patrol (CAP), an auxiliary of the U. S. Air Force, has conducted several drills on the two frequencies attributed to them , CH 1 148.150 and CH 2 148.125, with a PL for the New Hampshire wing of 136.5 hz ( Mass Wing and others may us the PL tone of 100.00 hz) this past month in Southern New Hampshire. You may also want to plug 143.9 MHz in -- that's the input frequency for the 148.15 repeater output. I don't remember the other VHF input, but it's pretty close to 143.9. MARS repeaters use frequencies very close to these, also. Also, if I remember correctly, 123.1 is a common frequency in the VHF aircraft band for "tactical" use by CAP aircraft and for air-to-ground communications. And of course, ALWAYS keep 121.5 programmed in, along with 243.0 if your scanner covers that band -- those are the VHF and UHF "GUARD" frequencies for aircraft emergency communications. Long, long ago, CAP also used 26.620 MHz. This was made available by using old crystal-controlled CB radios and putting the channel 10 CB crystals in backwards (put the Rx crystal in the Tx slot, and vice versa). I believe this frequency has long since been dis-used, with the advent of less expensive VHF FM gear and the passing of crystal- controlled CB equipment into the sands of time. Good point about the FRS frequencies. I'll remember that tip, thanks. |
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