Can you identify this heat shrinked componented named LR?

Community General Discussions
1

Hi All,

In salvaging transistors to make H-Bridges, I cam across this receiver circuit board from a Maisto Rock Crawler.  It has two components that are shrink wrapped, and the PCB lists them as LR1 and LR2.  Wikipedia lists L, and I think LS, but there is no LR.  And I couldn't find anything similar by googling "heat shrink resistor," "heat shrink diode," and heat shrink component." 

id_component.jpg

I also tried googling "rc power filter" and similar but had no luck that way either. And searching for 350991 (which is writte on LR1) doesn't yield anything either.  That number must be related to the shrink wrap itself.  

If you are able to identify this component for me, it would be appreticated.  I don't want to take off the heat shrink because i don't have a heat gun to shrink new tubing.  And when I use a soldering iron to shrink the tubing it takes too long and is uneven, unless i spend a long time on it.

Thanks in advance!

 

2

Sounds like a coil.

Sounds like a coil.

3

Just take that shrink tube

Just take that shrink tube off :slight_smile: I believe you will not need that anymore.

It would help if we could see a bigger photo of both sides and a close up of the magic component. Any numbers on the board may find something in google…

4

Ok fine, i took off the

Ok fine, i took off the shrink and it turned out to be a coil of wire.

IMG_20150114_060815.jpg

Time to harvest those transistors!  I've got a bunch of PCBs in my parts drawer that are taking up space.  I'll return to LMR if I get stumped on making the h-bridges.

5

Thanks all for the updates

Thanks all for the updates about this component.  I never heard about a choke before, and it was an interesting read.  I previously thought it was up to capacitors to get rid of noise, but now those caps have some competition!