Lithium Batteries

[Jeffrey Lomicka]

I fine tuned all my Hawkeye and Eagleeye transmitters this way when I 
had access to a spectrum analyzer in my company's hardware lab. It was a 
little painful, because you have to catch it in the act of transmitting, 
so you have to keep waiting for them to time out and sense motion 
again.  Pressing the buttons helps too. My goals was to get them all 
close enough to 310Mhz that the high Q front end of the RFX could 
actually read them.  While I was successful in increasing their range, I 
was not successful in getting the RFX to read them. Most of my motion 
sensors are still only seen by the MR26.  (I have the dual band RFX that 
reads 310Mhz X10 and 455Mhz OS weather sensors.  The weather sensors are 
working fine.)

On 4/9/21 10:40 PM, Jerry — MacSolutions wrote:
> Awesome, I might give this a “go.”
>
> Thx!
>
> —Jerry
>
>> On Apr 9, 2021, at 7:33 PM, Doug Kiekow <dougy at iphouse.com 
>> <mailto:dougy at iphouse.com>> wrote:
>>
>> https://mega.nz/folder/r0MDzAAL#WZJHne6hFnRTRSFnXVQG8Q 
>> <https://mega.nz/folder/r0MDzAAL#WZJHne6hFnRTRSFnXVQG8Q>contains some 
>> photos of ms14a and a ds12a. The antenna is simply soldered to the 
>> pcb trace shaped as a ring. If you have a signal strength meter, 
>> patience and careful hands you can also tweek the frequency by 
>> bending the small wire loop (4mm) either toward or away from the 
>> board.  The amount of bending is minuscule.
>>
>> dougy
>
>
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