544-B: Difference between revisions

Revision as of 06:12, 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 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.

Specifications

Range: 0.1 MΩ to 1,000,000 MΩ.
Accuracy: ±3% on the 0.1, 1, and 10 multipliers; ±4% on the lOO 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

@@ Line 21: / Line 21: @@
 * '''Output Voltage AC Supply:''' 100 V or 500 V Jumper Selectable.
 * '''Short Circuit Current AC Supply:''' 12 mA.
 ==Links==
@@ Line 28: / Line 27: @@
 * [[Media:GR Exp 544-B 06_1939.pdf|Experimenter describing Type 544-B June 1939]]
 * [[Media:GR Exp 544-B 02_1940.pdf|Experimenter describing Type 544-B February 1940]]
+==Catalog History==
+{| class="wikitable" style="margin:auto"
+|+
+|-
+! 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==