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IC Marking
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16th Oct 2019, 3:11 pm
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G6Tanuki
Dekatron
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 14,007
Re: IC Marking
Ultra-violet light (from one of those handheld 'fraudulent banknote detector things shops used to have a few decades back) can also provide a useful reveal.
[This sometimes helps too with the faded writing on valve envelopes].
G6Tanuki
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