Where did the Vista Fire air tacs change too, I had clear voice for a day or two, then it all seem to disappear.
Keep in mind that all the frequencies for air to air, air to ground, command and tactical as listed in the database are for initial attack only. Once a fire goes beyond 10 am of the day following a fires start/discovery it enters the extended attack phase. That is when all the frequencies are changed. If a fire is managed by the following Incident Management Team: Type 5 (least complex, usually involves one crew, engine etc.), Type 4 (a little more complex, may involve more than one resource, a single division), Type 3 (more than one division, multiple resources) frequency use is generally local, except for aviation. Day to day Forest, Fire or Service nets are used for command, along with R5 tacticals, but aviation will be assigned the same as a large fire, that is, the initial attack aviation frequencies are vacated, to be replaced with Geographic Area Coordination Center/NIFC Comm Division assigned frequencies. Type I (biggest and most complex resources assigned and most complex and important values, such as structures threatened) and Type II (now called CIMT's or Complex Incident Management Teams) then use the NIFC radio cache frequencies. Management of frequency use is done by NIFC and if you can't find any radio traffic on the frequencies listed in the database then you have to search the federal VHF High band. The frequencies chosen for command, tactical and aviation might be frequencies allocated to other federal agencies, but currently not in use in the area of the fire. Victor (VHF AM Aviation band) frequencies are coordinated with the FAA so the choice of frequencies might seem very random. So try the NIFC system frequencies shown in the database and if unsuccessful. you have to do a search. Keep in mind the frequency allocation is 162-166-5000 are repeater inputs, 166.5000-169.5000 are simplex or tacticals and 169-5000-173.9875 are repeater outputs.
I hope this helps.