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 • POWER   TRANSFORMERS •
USED IN EARLY MODELS
Power Transformers

 

   PHILCO power transformers are made to the high specifications of the Philco Research Laboratories; they are built for continuous operation without excessive heat; and are all approved by the Underwriter's Laboratories. All windings are dipped in insulating varnish and baked. Heavy impregnated insulating material between the windings insures further protection. The transformers are all subjected to a 1500-volt primary to secondary insulation test for one minute.

Extremely rigid construction gives complete freedom from mechanical noise and hum. All transformers listed below are for operation on 100 to 125 volts, 50 to 60 cycles. The voltage ratings are listed at 120 volts primary. The transformers are designed for top mounting on the sub-base with wiring on the under side.

Universal mounting clamps are available for top mounting with wiring on top of the sub-base.

POWER TRANSFORMERS
Secondary
Voltages*		 Current Rating
in Amps		 Used with Tubes Part
No.
340
2.5
5.0		 .03
4.0
2.0		 Plates of 80 Tube
1-24, 1-27
1-80		 5785
685
6.3
5.0		 .07
2.5
2.0		 Plates of 80 Tube
3-44, 1-36, 1-37, 1-42
1-80		 6454
750
2.5
5.0		 .065
7.0
2.0		 Plates of 80 Tube
3-24, 1-47
1-80		 5266
740
6.3
5.0		 .11
2.5
2.0		 Plates of 80 Tube
3-44, 1-36, 1-37, 1-42
1-80		 6457
670
6.3
5.0		 .13
3.5
2.0		 Plates of 80 Tube
2-44, 1-36, 3-37, 1-42
1-80		 6554
660
2.55
2.5
5.0		 .12
12.25
3.45
2.0		 Plates of 80 Tube
2-35, 1-24, 3-27
2-47
1-80		 6072
700
6.3
5.0		 .135
3.5
2.0		 Plates of 80 Tube
2-44, 1-36, 3-37, 2-42
1-80		 6804
720
6.3
5.0		 .145
4.5
2.0		 Plates of 80 Tube
4-44, 4-37, 2-42
1-80		 6672
750
2.67
2.68
5.0		 .11
10.5
3.45
2.0		 Plates of 80 Tube
4-24, 1-27
1-45
1-80		 3752
700
2.5
5.0
5.0		 .08
7.45
.5
2.0		 Plates of 80 Tube
3-24, 1-27
2-71-A
1-80		 4234
750
2.67
2.68
5.0		 .12
14.0
3.45
2.0		 Plates of 80 Tube
4-24, 4-27
2-45
1-80		 4446
700
2.5
2.5
5.0		 .11
7.45
3.0
2.0		 Plates of 80 Tube
3-24, 1-27
2-45
1-80		 4813
630
2.5
2.5
5.0		 .10
12.25
2.0
2.0		 Plates of 80 Tube
3-24, 4-27
1-47
1-80		 5362
665
2.5
2.5
5.0		 .095
9.2
1.5
2.0		 Plates of 80 Tube
4-24, 1-27
1-47
1-80		 5117
750
1.55
2.5
2.68
5.0		 .105
4.3
1.75
3.45
2.0		 Plates of 80 Tube
4-26
1-27
2-45
1-80		 3400
575
1.5
2.47
5.0
4.8		 .08
4.3
1.87
.6
2.0		 Plates of 80 Tube
4-26
1-27
2-71-A
1-80		 3271
375
1.55
2.47
4.85
4.80		 .037
4.3
1.87
.35
2.0		 Plates of 80 Tube
4-26
1-27
1-71-A
1-80		 3073
750
2.67
2.68
5.0		 .11
7.0
3.45
2.0		 Plates of 80 Tube
3-24, 1-27
2-45
1-80		 3868
660
2.67
2.68
5.0		 .12
14.0
3.45
2.0		 Plates of 80 Tube
4-24, 4-27
2-47
1-80		 5594
750
2.5
2.68
5.0		 .11
5.25
3.45
2.0		 Plates of 80 Tube
2-24, 1-27
2-45
1-80		 3516
750
2.5
2.5
5.0		 .105
10.5
3.45
2.0		 Plates of 80 Tube
4-24, 2-27
2-45
1-80		 4938
* All secondary windings, except 5 volt 80 filaments, have center tap connections.


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