I was in Skycraft the other day and they have a good stock of Dx6 and Dx7. Price is not bad.
Just think... You could go the field one day, see three guys flying and only two MAAC cards on the frequency board?
Should we add a few places for MAAC cards on 2.4Ghz? Do we need to keep the limit of 5 fliers at a time? You could have the flight stations full, a heli hovering off to one side and a foamy floating around off the other side!
These questions are sure to come up in the near future.
Sorry Joe - have no idea what you are talking about but it does sound interesting! This question may be too simple for a response but I was reading about radios the other day and noted that the JR radio I was reading about featured a "single conversion" receiver. All my receivers are "dual conversion". I think that dual conversion means the incoming signal is - shall we say - filtered twice by the reciever to eliminate interference, etc. I should know, but is this what "dual conversion" means in lay-man terms? In regards the JR - single conversion receiver - am I assuming correctly that they may use slightly different technology and hence their signal only requires a single filtration? I will not be able to attend the next three monthly meetings so if anyone in the know would like to respond, it would be appreciated. . . Cheers - John Mickle
Your transmitter encodes the information to send on a 72Mhz signal.
Single Conversion Rx: Has a filter to accept only the desired frequency (channel). It then mixes this signal with an internally generated signal to convert the 72Mhz to IF (intermediate frequency). Not too sure what the actual frequency is, 455Khz or 10Mhz. Now the 10Mhz signal is filtered so only the desired frequency is accepted then decoded to give the original signal.
Dual Conversion: Works just like the single conversion up to the point of the first IF. This is a higher frequency, not sure what the number is, but it is some value less than 72Mhz. The dual conversion will take this first IF, filter it and pass it through another conversion to produce a second IF. This second IF is in the range of Khz now. Finally it is filtered and decoded.
The new Dx7 system does not use the 72Mhz band so it does not have a place on the frequency board. It uses 2.4Ghz. This is the same as your cordless telephone. You can use your phone without getting mixed up with your neighbor, also using his phone on the same 2.4Ghz band. There are over 100 channels available in the 2.4Ghz band with protocols set in place to have the devices automatically pick a free channel. The Dx7 will actually use two channels, so theoretically, 50 planes could be in the air at once with no interference.