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Spockie-Tech
Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
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Frequency choice has proven to be more a case of "What Works and what doesnt" for Robot Wars competitors.
The "Official" Australia ground frequency (29Mhz) sucks badly. It needs massively long antennas (prone to being chopped off or damaged in Robot Wars), is very subject to interference (Causing our failsafing speed controllers to stop or get the jitters), and Radios with 3 or more channels are impossible to get on this frequency. Most cars only need 2.
36Mhz is a bit better, but not much. A Good (not a cheapy) 36Mhz radio works OK if everything else is right, but they still suffer from reception problems on occasion.
72 and 75Mhz Systems from the USA work much better, being double the frequency, and so need shorter antennas and get less interference, but are of dubious legality. Noone in Robot Wars will bite you for using one, but you might find some RC Plane clubs or do-gooder "But thats "Illegal" (gasp) !" nobs whining.
So far the best system price, reliability and features wise has proven to be the "Spektrum" 2.4Ghz systems, which also avoid frequency/crystal clashes and are legal in Australia.
more info here
http://www.robowars.org/wikka/StandardRadio _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
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Thu Nov 02, 2006 4:43 pm |
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