MMK Posted June 5, 2013 Share Posted June 5, 2013 I have RXTX-433M RF modules........ in order to increase the range b/w the Transmitter & Receiver to communicate........ I plan to make a amplifier......... can a class A amplifier hooked on before the antenna section on Transmitter module will work???? or Class C???? plz give me a good circuit diagram too as I couldnt find one on google! Plz HELP ME!!!!! Remember that the Transmitter & Receiver is used for activating relays and not for any audio signals! i just wanna increase the RANGE of this system!! Link to comment Share on other sites More sharing options...
studiot Posted June 5, 2013 Share Posted June 5, 2013 Ask here allaboutcircuits.com Link to comment Share on other sites More sharing options...
pwagen Posted June 5, 2013 Share Posted June 5, 2013 (edited) Whether you want class A or class C would depend on what you need for your particular construction. A has a lower efficiency but is simpler and has (I think) less distortion. C, on the other hand, has high distortion but a very high efficiency. From the sounds of it, distortion is less important, so you'd go for efficiency, which means a class C amplifier. As for diagrams, look here: http://www.electroschematics.com/tag/rf-amplifier-circuits/ Edit: I take that back. Look here instead: http://www.angelfire.com/planet/sft_accommodation/rf_amp.htm Edited June 5, 2013 by pwagen Link to comment Share on other sites More sharing options...
Externet Posted June 6, 2013 Share Posted June 6, 2013 Many things have to be considered... What is the current power you are using ? What is the distance wanted to reach ? Is there line of sight between units ? Will it be 2 way communication ? If yes, you will have to amplify the transmitters at both ends. Have you tried by using high gain directional antenas instead of amplification ? Here arew some links of interest: http://www.abacom-tech.com/%2F433MHz-RF-Power-Amplifier-PLA-05W-P93341.aspx http://www.flytron.com/openlrs/108-7w-booster-for-uhf.html You may find kits too. Look for SKYA433YAG125 at: http://www.skyrfid.com/Antenna_UHF_433_MHz.php 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now