# Top of transformer came off

**URL:** <https://discourse.myriadrf.org/t/top-of-transformer-came-off/5942>\
**Category:** LimeSDR\
**Created:** [29 March 2020 16:19 UTC](https://discourse.myriadrf.org/t/top-of-transformer-came-off/5942 "2020-03-29T16:19:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![blipton](https://avatars.discourse-cdn.com/v4/letter/b/e9c0ed/32.png) [@blipton](https://discourse.myriadrf.org/u/blipton)\
**Post date:** [29 March 2020 16:19 UTC](https://discourse.myriadrf.org/t/top-of-transformer-came-off/5942/1 "2020-03-29T16:19:32Z")

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Should I have any concern that the flat “GU” top came off on two of the baluns?

 ![image](https://canada1.discourse-cdn.com/flex034/uploads/myriadrf/original/2X/f/f17966208e03be41978c22080160a7a7ac7d80d4.jpeg)

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**Author:** ![ccsh](https://avatars.discourse-cdn.com/v4/letter/c/3be4f8/32.png) [@ccsh](https://discourse.myriadrf.org/u/ccsh)\
**Post date:** [29 March 2020 18:34 UTC](https://discourse.myriadrf.org/t/top-of-transformer-came-off/5942/2 "2020-03-29T18:34:10Z")

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You can find the answer by search tool 🙂

[Something fell off during assembly of the enclosure - #3 by ccsh](https://discourse.myriadrf.org/t/something-fell-off-during-assembly-of-the-enclosure/1672/3)

> [@Black square plastic element with "GU" indication on top](https://discourse.myriadrf.org/t/black-square-plastic-element-with-gu-indication-on-top/1411/5):
>
> Yes, only this “hat” has been removed. Nevertheless, is was there for some reason, I am just curious what it is stuck_out_tongue Following photos show exactly problematic element (second photo shows another board where hat is in right place): [[image] ](http://tinypic.com/images/goodbye.jpg)[[image] ](http://tinypic.com/images/goodbye.jpg)

> [@Broken transformer T4 TCM1-63AX+ (RX1-H)](https://discourse.myriadrf.org/t/broken-transformer-t4-tcm1-63ax-rx1-h/1573):
>
> Hello Guys, After struggling with the coax connecters i see that the top from the transformer T4 TCM1-63AX+ (RX1-H) is broke off. It looks like this small plate itself is not broken. Maybe i can just glue it again. Is this possible and what glue shall i use? Regards Ben

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**Author:** ![d0ug](https://avatars.discourse-cdn.com/v4/letter/d/bbe5ce/32.png) [@d0ug](https://discourse.myriadrf.org/u/d0ug)\
**Post date:** [6 April 2020 07:54 UTC](https://discourse.myriadrf.org/t/top-of-transformer-came-off/5942/3 "2020-04-06T07:54:25Z")

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Likely your matching networks are all out of wack with those pieces of the magnetics missing. Those pieces almost certainly tuned the ferrite core to a specific response, without them it’s no longer tuned as it should be. Does it still work, probably, but probably not as well as it did before.

You probably need to go look up the schematic for the board, find out what those parts are, the values and go look up some electronics supplier like mouser or digikey and get replacements. Hopefully you own and are good with a hot air gun, or know someone who is.

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**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [7 April 2020 10:34 UTC](https://discourse.myriadrf.org/t/top-of-transformer-came-off/5942/4 "2020-04-07T10:34:34Z")

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IIRC those pieces on the top of the transformers are simply for the pick and place machines to pick them up by. So provided the ferrite itself and any of the wires are not damaged, it shouldn’t cause any problems.