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| General Electronics Chat This forum is for general chat about electronics, eg: Dont know what a part does? Dont know how to read a circuit? Want to get an opinion? |
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16th July 2008, 04:26 AM
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How do i open a HC49U crystal case?
how do i open a crystal and still be able to use it outside of its case?
I read that the crystals with HC49U packages are resistance welded together. This is a sort of curiousity question cause i want to experiment with the bare crystal for a project. |
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16th July 2008, 05:15 AM
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A Dremel tool and a very steady hand.
__________________
"Because I be what I be. I would tell you what you want to know if I
could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har." |
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16th July 2008, 05:21 AM
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"How do i open a HC49U crystal case?" << Very carefully
 Agree, your best bet would be a Dremel with a fine cutting disk. |
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16th July 2008, 10:17 AM
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Crystal..gifThere appears to be a slight lip at the base that has been resistance welded. I would try metal snips or diagonal cutters to remove the lip and fracture the weld. Abrasive cuttoff will no doubt open it, but I would be concerned that vibration and contamination from sparks or abrasive dust might damage the crystal.
John |
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16th July 2008, 10:46 AM
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I had and may still have a large collection of older crystals in holders that can be opened easily. Some of my pals have lapped the crystals or marked on with graphite to alter the frequency. If you lived close by I'd give you some - if I still have them. They were given to me - in 6 to 8 mHz range.
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stevez |
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16th July 2008, 04:17 PM
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I don't live close by but thanks for the offer.
i'll see if i can cut out the bottom with a dremel. |
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16th July 2008, 08:26 PM
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Five minutes work with a junior hacksaw and the case is open.
The hard parts are: Holding the crystal firmly in a vice without crushing the can. Making sure that the hacksaw does not pull the crystal out of the can and onto the floor. (As happened on my first attempt, smashing the quartz). JimB
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Experience is directly proportional to the value of the equipment ruined. |
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16th July 2008, 09:05 PM
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wow, nice work!
ever try pulling a crystal out of a quartz cylinder? (the kind for wrist watch crystals) |
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16th July 2008, 10:04 PM
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Quote:
Quote:
JimB
__________________
Experience is directly proportional to the value of the equipment ruined. |
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