is this normal to find inside?

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caution

Member (SA)
Mar 25, 2014
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Boomboxery
That's not glue, it's wax. Most older tuner circuits have a small amount applied to the coils in order to provide some mechanical stability, in order to maintain tuning alignment by keeping free-standing oscillator coils from separating, which would change their inductance. You'll also find wax-soaked foam inserts inside the inductors sometimes.
If you need to work on the circuit you can just melt it off.
 

Superduper

Member (SA)
It's wax. Tuners are extremely sensitive and finicky animals. Therefore after assembly, each tuner goes through final adjustment and alignment. Component placement, length of leads, shape of those copper coils, all affects alignment. For that reason, after the alignment, most of the ares that can be affected are "set" in wax to hold them in place. You know how it's easy to bend caps and transistors out of the way? Well, don't do that in the tuner, lol.
 

Perrin21

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Jun 21, 2017
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Preston, Lancashire, UK
Superduper said:
It's wax. Tuners are extremely sensitive and finicky animals. Therefore after assembly, each tuner goes through final adjustment and alignment. Component placement, length of leads, shape of those copper coils, all affects alignment. For that reason, after the alignment, most of the ares that can be affected are "set" in wax to hold them in place. You know how it's easy to bend caps and transistors out of the way? Well, don't do that in the tuner, lol.
its probably to stop people tuning their tuner into the police bands lol.
 
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