Let him learn the hard way about RF design work. There's a reasonable=20 chance what he makes will work for short range (line of sight in a=20 good-sized room), it doesn't have to pass FCC, and you don't care if=20 other RF devices in the same general frequency band are rendered=20 unusable. This makes is far easier to 'succeed' even if what is created=20 is not a practical or legal product. With a RF power amp you don't even=20 need an antenna to get a few feet of range, the zigbee modules I've=20 designed (cc2591 RF poweramp was used) get a few feet sans antenna. I=20 didn't do the RF part of the design for a reason. I agree $149 is a no-brainer, but VG wants to prove he can do it for=20 cheaper himself. At the least he'll have some more EE experience at the=20 end. VG: when TI says the design should be copied as accurately as possible,=20 believe it. If it is a 4-layer design and you want to do it in 2,=20 figure half the range at best and a good chance of unusably poor=20 performance. Good luck to you! J V G wrote: > On Sat, Nov 19, 2011 at 12:46 PM, Reginaldo Duarte > wrote: >> Believe me, it will be much cheaper and you also don't have to worry abo= ut >> RF layout wich is a pain in *** if you don't have the necessary equipmen= t. > > You mean this? https://estore.ti.com/CC85XXDK-HEADSET-PurePath-Wireless-H= eadset-Development-Kit-P2452.aspx > > I'm trying to AVOID paying hundreds of dollars. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .