On Tue, Feb 11, 2014 at 7:47 PM, RussellMc wrote: > Max 2644 output is around 50 mW input max at Vcc =3D 5V,. > Output is about +6 dBm max (fig top left page 4) or about 4 mW (!) > > Either the MTC-01 is making << 10 mW or the Max2644 is not going to help > you vastly. > Odds are the RF level is much lower than 10 mW as with a hald decent aeri= al > and sensible receiver 10 mW can get you vastly further than that. > > The MTC RF MAY need attenuating to present input overload if power is as > high as it might be, but probably not. You may be able to link couple to > the output tank (if it exists) which allows any degree of attenuation > desired by moving relative coil positions. > > Turns out the MTC-01 is transmitting at 0.12mW (someone found the FCC document for it). The chip inside is a CYRF6936 ( http://www.cypress.com/?rID=3D14284) which has a max TX power of +4dBm. It has been reported that sticking a better antenna improves range to ~30m, so I'll try that first. Then it might be worth making an amplifier for it. I can't seem to find any 2.4GHz amplifier modules. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .