OK, then you had it right.
Those inductive coil antennas are every bit as good, if not better than a
whip.
-----Original Message-----
From: Mark - Myakka Technologies
Sent: Thursday, January 19, 2017 6:41 PM
To: Chuck McCown
Subject: Re: [AFMUG] Enhancing my home automation system.
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
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------
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?
