What are some of the common power/signal short forms on amplifier circuit boards?
A general Google search comes up with the electrical definition, but not necessarily how they are used on an amp board.
These are the easy ones,
SGND = Signal Ground
In = Signal In
Out = Speaker Out
Now how about,
PGND = Power ground, I take it this is "0" from a +0- unregulated power supply, but not chassis ground?
When there is no "Speaker -", where do you connect it? (I see this on many Apex amps)
What other common short forms/labels are not necessarily straightforward for the beginner?
Thank you for your patience,
David.
A general Google search comes up with the electrical definition, but not necessarily how they are used on an amp board.
These are the easy ones,
SGND = Signal Ground
In = Signal In
Out = Speaker Out
Now how about,
PGND = Power ground, I take it this is "0" from a +0- unregulated power supply, but not chassis ground?
When there is no "Speaker -", where do you connect it? (I see this on many Apex amps)
What other common short forms/labels are not necessarily straightforward for the beginner?
Thank you for your patience,
David.
In most audio amplifiers, the speaker returns to the power supply common.
Guitar amplifiers connect many of the circuit common leads to various points
on the chassis, which is not good practice for audio.
There's no official standard terminology, but markings should be clear and self-explanatory,
though often they are not. Common is a better term to use than ground, in most cases.
The chassis may indeed be grounded by the power cord's green safety ground lead.
Guitar amplifiers connect many of the circuit common leads to various points
on the chassis, which is not good practice for audio.
There's no official standard terminology, but markings should be clear and self-explanatory,
though often they are not. Common is a better term to use than ground, in most cases.
The chassis may indeed be grounded by the power cord's green safety ground lead.
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