For example, MP147 refers to Mo-Permalloy cores used in power electronics and high-precision inductors.
It utilizes the same large-diaphragm capsule as the iconic U 47 but uses a modern tube circuit for ultra-low noise.
If you are in a manufacturing or engineering environment, "147 work" is almost certainly a reference to . This governs the "Control of Hazardous Energy".
Proper work requires "Authorized Employees" to apply lockout/tagout devices to ensure the safety of everyone in the vicinity. 3. Electronics and Materials Science