Identifying part in handheld transmitter

[pipingmike]

Hello,

I am recycling an old handheld door buzzer in a project of mine and am familiarizing myself with its internals. It is from Linear Corp, model DXT-23, with part number SNT00377. It operates at 315MHz at 3.3 volts from two 2032 batteries. I have come across this RFM module where I cannot find a data sheet for it and websites that appear to be selling it do not have pictures of it to confirm it is the same part I am looking at. I have emailed support of who I think is the manufacturer (https://www.rfmi.co/) is and they do not have the part number in the system. Any help is appreciated  .

Bonus: If possible can anyone verify the value of this inductor? I have a rinky dink plastic caliper to measure the length and diameter. It's measurement were:

N: 10
Diameter: 2mm
Wire thickness: <1mm
length: 4.5

using a calculator I got .0072 micro H and noticed standard is .1 uH, if I tweak diameter to 2.4mm I get around that value. Let me know if you think .1uH is a good bet.

Here is Imgur Album with related photos (Board Overview, RFM up close, Inductor up close, board info, rinky dink caliper)

https://imgur.com/a/WYPXCOq

Thank you

[floobydust]

The TO-39 metal can is a common 315MHz SAW resonator. Nowadays they are smaller SMT and even using a PLL and crystal oscillator with an IC. You can get bushels of 315MHz TX boards on eBay or Aliexpress.

[wasedadoc]

The TO-39 metal can is a common 315MHz SAW resonator. Nowadays they are smaller SMT and even using a PLL and crystal oscillator with an IC. You can get bushels of 315MHz TX boards on eBay or Aliexpress.

Many of those boards are made in 315 and 433 MHz versions. If going that route be sure to select the 315 model.