Tait T800 II Series, Service Manual

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A1.2 General
M800-00
31/08/96 Copyright TEL
1.2 Caution: Beryllium Oxide & Power Transistors
The power transistors in current use all contain some beryllium oxide. This substance,
while perfectly harmless in its normal solid form, can become a severe health hazard
when it has been reduced to dust. For this reason the power transistors should not be
broken open, mutilated, filed, machined, or physically damaged in any way that can
produce dust particles.