[RFI] Ferrite core and hot glue?

[Larry Benko]

Martin,

About the only way to damage a ferrite core is to heat it above the 
curie point or to crack it by dropping it or contacting it with a hard 
object.  61 material ferrite has a Curie temperature in excess of 300 
deg. C.  I have measured cores that were held to a PCB via nothing, hot 
glue, silicone, epoxy, and double sided tape and couldn't measure any 
difference.  However if you use so much adhesive that it get up on the 
turns the performance can change since there will be some increase in 
the winding capacitance.

Larry, W0QE


On 8/23/2019 3:22 AM, Martin Kratoska wrote:
> I need to fix a choke balun wound on a BN61-2402 binocular core to the 
> PC board. The hot glue has 200 degs C when applied. Can it destroy the 
> core?
>
> 73,
> Martin, OK1RR
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