Safety First

Be extremely cautious & careful with live Electricity, Charged Capacitors

and Exposed Connections, spacing-out is lethal

Always when working on energized equipment

Be slow, deliberate and methodical

When measuring live equipment, one hand in the pocket

the other hand holding the Voltage probe.

Even de-energized equipment can shock when Capacitors

Discharge and find a current path, right through your Heart.

Proper training is the responsibility of the Hobbyist

to learn from a proper safety curriculum

ShermanAudio is a Hobby, not a Business

If you need Safety Training visit the OSHA Website for lots of great resources


"Untrained people create problems, Clever people fix them, Wise people avoid them"

The message is not discouragement, but a realistic safety position on

working with exposed residential AC connections, PC Boards or wires

Safety example: Building external power supplies

If you want to create an external Power Supply solution great, but do it the proper way as shown in my illustration below

One never should create a Power Supply with exposed potentially live connections, the umbilical cord with the

exposed pins always is fastened to the Preamplifier while the receptacle that contains the dangerous

voltages is always installed on the Power Supply

Preamplifiers benefit from separate Power Supplies, but please do it right!

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