# NoteCarrier B Schematic

**URL:** <https://discuss.blues.com/t/notecarrier-b-schematic/1407>\
**Category:** Notecarrier B\
**Created:** [May 7, 2023, 2:36pm UTC](https://discuss.blues.com/t/notecarrier-b-schematic/1407 "2023-05-07T14:36:47Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Pradeep](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/pradeep/32/479_2.png) [@Pradeep](https://discuss.blues.com/u/Pradeep)\
**Post date:** [May 7, 2023, 2:36pm UTC](https://discuss.blues.com/t/notecarrier-b-schematic/1407/1 "2023-05-07T14:36:47Z")

</div>

Hi All,

I’m currently designing my own notecarrier based on the notecarrier B. And I found that they have used this circuit in between the connector, but I can’t find the reason. Can anyone help me with that?

 ![image](https://us1.discourse-cdn.com/flex020/uploads/blues/original/1X/5c2882289986fc5d8ff1d6b2277eb2a4f96a5a8e.png)

Regards,  
Pradeep S.

---

<div class="post-metadata">

**Author:** ![robouden](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/robouden/32/336_2.png) [@robouden](https://discuss.blues.com/u/robouden)\
**Post date:** [May 7, 2023, 10:09pm UTC](https://discuss.blues.com/t/notecarrier-b-schematic/1407/2 "2023-05-07T22:09:26Z")

</div>

Pradeep,

Those are BAV99BRVA ([https://t.ly/SV4O](https://t.ly/SV4O))probably for protecting the lines from spikes.

Regards,  
Rob Oudendijk