[AMPS] glue

[km1h@juno.com (km1h@juno.com)]

On Tue, 26 Jan 1999 22:04:39 -0600 Jon Ogden <jono@enteract.com> writes:
>
>>Has anyone had any experience in glueing a broken choke on a ceramic 
>form
>>back togeather?  I have one in my tank circuit that I glued back 
>togeather
>>with a good grade of 5 min. epoxy and I wondered about the rf heating 
>it up
>>and destroying the bond after a period of time.
>
>Hi Larry,
>
>I tried it once with super glue and it really didn't last too long.  
>Started giving me problems after a couple of weeks.  Perhaps epoxy 
>will 
>work better, but don't use superglue.  Someone told me that it is a 
>dessicant which means that it ends up absorbing moisture.  This 
>moisture 
>will eventually cause the bond to fail. 



Hmmmm. At work we use Loctite Super Bonder 499. This is a modern offshoot
of SuperGlue ( contains cyanoacrylate ester).
It is developed as a "thermal cycling resistant gel instant adhesive" 

Ceramic is not mentioned on the tube short list but I use it daily at
1-60GHz including bonding ceramic and other parts to ceramic. 
Dont know about HF QRO but it survives 100W at 7 GHz from -35C to +75C.

Sometimes it takes a bit more than " someone told me it dont work". 
Whatever happened to first person experience and experimenting?

73  Carl  KM1H


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