Chuck, Shorter one is 2.25"
Coil one is 3.75". Coiled part is 1.25" -- Best regards, Mark mailto:[email protected] Myakka Technologies, Inc. www.MyakkaTech.com Proud Sponsor of the Myakka City Relay For Life http://www.RelayForLife.org/MyakkaCityFL Please Donate at Please Donate at http://www.myakkatech.com/RFL.html ------ Thursday, January 19, 2017, 8:15:06 PM, you wrote: CM> Put a ruler down by the board and shoot another picture. CM> The loading coil in the inductive antenna shortens it but hard to tell. I CM> would guess the shorter one is a quarter at 902 and the coil is the 315 MHz CM> antenna. CM> Quarter wavelength at 928 Mhz is more like 3 inches. CM> -----Original Message----- CM> From: Mark - Myakka Technologies CM> Sent: Thursday, January 19, 2017 5:46 PM CM> To: [email protected] CM> Subject: [AFMUG] Enhancing my home automation system. CM> I'm using a z-wave based home automation system. Works well even CM> though distance between devices is a bit too short. I have a z-wave CM> garage door opener that needs to talk directly to the base unit. CM> Haven't been able to get to work though any repeaters. CM> Z-Wave runs on 908.42 mhz. So I figured I could just open the box put CM> a solder a jumper on, and attach an external antenna to give me more CM> range. Attached is a picture of the device. There are two antennas CM> in the device on for the zwave 908 and another for the door sensor CM> that runs around 300mhz. Not sure which one is which. Is the straight CM> one that is about 2" long the 900 or is it the curly one? CM> The curly one is soldered at two point on the board, whereas the CM> straight one is only soldered at one point. Can anyone tell which is CM> which from picture?
