Thread Tools 
This thread is privately moderated by Ribble, who may elect to delete unwanted replies. 


United States, PA
Joined Dec 2011
2,855 Posts

Discussion
Transmitter Power Output
TRANSMITTER POWER SETTING
EU limits output power to 100mW US limits output power to 200mW = 200mW output power 2.4GHz RF 0dbm = 1mW 3dbm = 2mW 6dbm = 4mW 10dbm = 10mW 20dbm = 100mW 23dbm = 200mW A Simple yet effective RF Sniffer http://macgregor.co.uk/support/faq/gen2.htm 2.4GHz Antenna 1/4 wavelength = 30.7mm = 1.21 inches  DH9104 & DH9100 TX schematic drawing (actually transmits 4 channels) http://www.rcgroups.com/forums/showthread.php?t=1571121 



United States, PA
Joined Dec 2011
2,855 Posts

Motor Amps using battery MAH rating and flying time
Calculate motor amps from flying time
Motor amps ? If you start with a full battery and get an accurate time how long the battery lasts, you can figure out the average current that the motor drew during those minutes. Amps = (mah) x (1amp/1000ma) x (60minutes/1Hour) / (RunMinutes) Amps = (mah) x (60/1000) / RunMinutes Amps = 0.06 x mah/minutes Example: Amps = 0.06 x mah / Minutes Amps = 0.06 x 1000 / 6 = 10 amps average current Amps = 0.06 x 1000 / 3 = 20 amps average current = 1000mah battery that lasts 3 minutes Amps = 0.06 x 1300 / 3 = 26 amps average current Amps = 0.06 x 1300 / 4 = 19.5 amps average current Amps = 0.06 x 1300 / 5 = 15.6 amps average current Amps = 0.06 x 1300 / 6 = 13 amps average current Amps = 0.06 x 2000 / 6 = 20 amps average current = 2000mah battery that lasts 6 minutes Amps = 0.06 x 2000 / 3 = 40 amps average current Amps = 0.06 x 680 / 6 = 6.8 amps average current Amps = 0.06 x 680 / 3 = 13.6amps average current Amps = 0.06 x 900 / 6 = 9 amps average current Amps = 0.06 x 900 / 3 = 18 amps average current Well, more or less. Pick a ratio of MAIN/TAIL and apportion the total amps A good ratio may be 3/1 where main = 75% and tail gets 25% 
Thread Tools  
Similar Threads  
Category  Thread  Thread Starter  Forum  Replies  Last Post 
Discussion  Futaba 4YF Transmitter Output Power  Earl Boebert  Radios  3  Jun 27, 2011 12:04 AM 
Question  Hitec transmitter output power???  Hovertime  Hitec/Multiplex USA  1  Jul 07, 2004 05:48 PM 
Question  GWS transmitter output power???  Hovertime  GWS (Grand Wing Servo)  11  Jul 06, 2004 04:10 AM 
Different transmitter output power  what significance?  Vic Peh  Radios  1  Nov 08, 2003 07:28 AM  
Power output of a typical Transmitter.  Kevin Murray  Power Systems  17  Sep 23, 2001 06:13 PM 