My local red cross section is preparing plans for a command verhicle.
One of the main things that will have to be installed is VHF and UHF communications, both as net controll station and as repeater.
Lets first list the frequenties in use, there are 5 channels between 146 and 147 Mhz 2 channels around 165 Mhz and a repeater channel 165 Mhz in 171 Mhz out, the two UHF repeater pairs are 455 Mhz in 465 Mhz out. The VHF repeater 165/171 is unlikely to opperate from the verhicle because those are fixed on hardened sites so the VHF repeater in the verhicle will most likely opperate 146 in 165 out and never in combination with the NCS function. The UHF repeater can opperate in combination with the NCS function.
when opperating as NCS there can be maximum 2 VHF and 1 UHF nets going. the VHF nets can opperate either on one of the simplex frequenties or the repeater frequentie with the repeater being fixed on a building, the UHF nets can be either with external repeater or trough the internal repeater.
The posibilety to link between nets is desired but not required.
Now for hardware there are a few conflicting demands, it has to be fast setup, no exposed parts other then the controll surface, low cost and the abilety to freely set and transmit 5TVO.
Our maximal allowed power is 10 Watt no restriction in antenna gain or hight.
Does anyone have a suggestion what setups would fit the bill?
Andre
One of the main things that will have to be installed is VHF and UHF communications, both as net controll station and as repeater.
Lets first list the frequenties in use, there are 5 channels between 146 and 147 Mhz 2 channels around 165 Mhz and a repeater channel 165 Mhz in 171 Mhz out, the two UHF repeater pairs are 455 Mhz in 465 Mhz out. The VHF repeater 165/171 is unlikely to opperate from the verhicle because those are fixed on hardened sites so the VHF repeater in the verhicle will most likely opperate 146 in 165 out and never in combination with the NCS function. The UHF repeater can opperate in combination with the NCS function.
when opperating as NCS there can be maximum 2 VHF and 1 UHF nets going. the VHF nets can opperate either on one of the simplex frequenties or the repeater frequentie with the repeater being fixed on a building, the UHF nets can be either with external repeater or trough the internal repeater.
The posibilety to link between nets is desired but not required.
Now for hardware there are a few conflicting demands, it has to be fast setup, no exposed parts other then the controll surface, low cost and the abilety to freely set and transmit 5TVO.
Our maximal allowed power is 10 Watt no restriction in antenna gain or hight.
Does anyone have a suggestion what setups would fit the bill?
Andre
