Hi
I am trying to repair a small indoor weather station that my wife has in the kitchen , there is not really a lot I can replace ,I am just replacing stuff on it that I have in stock .
The pat in question is like a very small Capacitor , it measures 4.37x6.73mm , it has 2 legs and the writing on it is 30mH and it is black in colour .have searched online for anything resembling this but only come up with larger part in the micro Henry ! .



spike

 

inductor

mH = millihenry
uH = micro

 

Yes sorry meant to say Milli .

 

These would do the job. Then you just have to find a use for the 49 spares!
http://www.ebay.co.uk/itm/50Pcs-Dru...294346&hash=item1c58905e85:g:GNwAAOSw9LxZun13

 

Thanks for that , is there a way to test this one I have ! .

 

You could measure its resistance - expect it read 0Ω to 5Ω. this will tell you if the winding is open circuit but it won't tell you about shorted turns.

 

Thanks for that , is there a way to test this one I have ! .

Measure the resistance. If it measures near zero ohms, then the device is most likely good. I really doubt that this part is bad.

 

162Ω

 

Does your meter read zero ohms when you connect the leads together?
I don't think 162Ω is a good value for a 30mH inductor.

 

Yes it is zero

 

168 is a little high, but not out of the ball park high. Here's a link to a similar part: https://www.digikey.com/product-detail/en/abracon-llc/AIUR-16-333K/AIUR-16-333K-ND/5043385

 

Thanks for that SLK001 ,I mean it could be the screen that has gone , not had it that long , there is another part on the board that I can't id , it is around 7x3mm 2 legs seems to be a metal container no marks on it will post a pic .it is at the bottom of pic , CR1

 

Digikey may be out of the OP's range, I have got the odd one from Coil Craft via their free sample policy!
Max.

 

Hello,

When I look at Bourns for the inductors, I see a DC resistance of 65, 80 or 91 Ohms, dependend on the series.
The small metal part is a crystal, there could be a frequency written on it.

Bertus

 

Thanks to all for your help n input , think I have enough info now to sort some bits out .

cheers

Spike

 

Thanks to all for your help n input , think I have enough info now to sort some bits out .

cheers

Spike

The Peak Atlas LCR meter would be helpful - but its not pocket money price.

A quick & dirty DIY method is to build an oscillator that doesn't need tapped inductor or capacitor - run the inductor up with a known capacitance and calculate inductance from the frequency you end up with. Can't remember if the best candidate is a Butler, Armstrong or something else - so I can't find a link to post.

Part number inductors were very common in big name brand TVs etc, but a trend is developing for numeric codes that follow the same 3 digit pattern found on SMD resistors.