Bias Meter

Object/Artifact

Sidney Museum and Archives

Name/Title

Bias Meter

Entry/Object ID

2008.039.010

Description

Meter for measuring percent bias. These are used by electricians to measure and adjust idle current (bias) of power tubes in guitar or audio amplifiers. Circular clear plastic housing. White meter face, printed in black with individual unit markings from a top "0" to "35/M" on right and to "35/S" on left. Black metal needle centrally affixed with clear plastic screw with top slot, on top of housing, used to calibrate needle. Below needle component is printed "PERCENT BIAS/ES=560 UA. D.C./Western Electric/Made in U.S.A./AA3E" Housing drilled with three screw holes for attaching and reverse of meter has two horizontally-placed brass screws, near top area.

Acquisition

Source (if not Accessioned)

Wallace, Susan

Notes

Accession Date: 10-Dec-08 Mode of Acquisition: gift

Lexicon

Legacy Lexicon

Object Name

Meter, bias meter

Class

Communication, Tools & Equipment for - Written Communications T&E - Writing Accessories

Created By

Jones, Isabel

Create Date

April 25, 2009

Updated By

[email protected]

Update Date

October 8, 2026