544-B: Difference between revisions

Revision as of 23:09, 28 March 2024

General Radio 544-B

megohm bridge General Radio 544-B Megohm Bridge Available from 1939 to 1963 Manuals General Radio 544-B Megohm Bridge 458-I 1954 (All manuals in PDF format unless noted otherwise)

The General Radio 544-B Megohm Bridge was introduced in 1939 Catalog K1 and remained available through Catalog R 1963.

The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit. It uses a built-in vacuum tube voltmeter (VTVM) as a detector, and an AC power supply 544-P3 for both VTVM and the Unknown voltages.

The 544-B comes installed in an oak hardwood case with operating instructions attached to the inside of its cover. A flexible jack with lead is mounted in the cover for checking the internal standards as explained in the manual. The 544-B was also available modified for use with a battery power supply.

Specifications

Range: 0.1 MΩ to 1,000,000 MΩ
Accuracy: ±3% on the 0.1, 1, and 10 multipliers; ±4% on the 100 and 1000 multipliers
Output Voltage AC Supply: 100 V or 500 V, jumper-selectable
Short Circuit Current AC Supply: 12 mA

Links

Catalog History


Catalog	Year	Page Number
K1	1939	90
K2	1942	84
K3	1944	82
K4	1945	83
L	1948	88
M	1951	92
N	1954	78
O	1956	16
P	1959	8
Q	1961	8
R	1963	47

Photos

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 The '''General Radio 544-B Megohm Bridge''' was introduced in 1939 Catalog K1 and remained available through Catalog R 1963.
-The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit.  It uses a built in vacuum tube volt meter as a detector and an AC power supply [[544-P3]] for both VTVM and the Unknown voltages.  Its comes installed in an oak hardwood case with operating instructions attached to the inside of its cover.  A flexible jack with lead is mounted in the cover for checking the internal standards as explained in the manual. The 544-B was also available modified for use with a battery power supply.
+The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit.
+It uses a built-in vacuum tube voltmeter (VTVM) as a detector, and an AC power supply [[544-P3]] for both VTVM and the Unknown voltages.
+The 544-B comes installed in an oak hardwood case with operating instructions attached to the inside of its cover.
+A flexible jack with lead is mounted in the cover for checking the internal standards as explained in the manual.
+The 544-B was also available modified for use with a battery power supply.
 ==Specifications==