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1996

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Re: Controlled Impedance - Dielectric Constant- Comment
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From [log in to unmask] Tue Jun 4 17:
43:01 1996
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Regarding dielectric constant, I have found that 4.5 is an average for FR4 material however if you check the data sheet information from supplier to supplier you will see a range of 4.2 to 4.9

Ron

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