Tube Lamp Type Output Transformers


F SERIES
Wide band output transformers with third winding for NFB exclusives use, which can make stabilized
NFB circuit, eliminating unstable oscillation though the changes of secondary load. Impedance for
NFB winding is 16 Sg taps are provided for the models excepting F781, 782,783, so that UL
circuits can be constructed.
Stock
Mark
Catalogue
No.
Impedance Frequency
Range
Output Primary Maximum
DC current
Case
Primary Secondary Balance Unbalance
o
F-475 5K(Single) 4,8,16 30-50K 7.5W 45mA F2
o
F-483 5K(Push) 4,8,16 30-50K 15W 110mA*2 10mA F2
o
F-485 8K(Push) 4,8,16 30-50K 15W 110mA*2 10mA F2
o
F-486 10K(Push) 4,8,16 30-50K 15W 110mA*2 10mA F2
o
F-682 3.5K(Push) 4,8,16 30-50K 30W 200mA*2 20mA F3
o
F-683 5K(Push) 4,8,16 30-50K 30W 150mA*2 10mA F3
o
F-684 6.6K(Push) 4,8,16 30-50K 30W 150mA*2 10mA F3
o
F-685 8K(Push) 4,8,16 30-50K 30W 150mA*2 10mA F3
F-781 2.5K(Push) 4,8,16,32 30-50K 50W 250mA*2 20mA F4
o
F-782 3.8K(Push) 4,8,16,32 30-50K 50W 250mA*2 20mA F4
o
F-783 5K(Push) 4,8,16,32 30-50K 50W 250mA*2 20mA F4
Insulation Resistance:DC500V 100M
Insulation Strength :1.5KV 1-Minute Except F475-486:1.0KV 1-minute

F

Model Name Case dimensions Fixing dimensions Screw Terminal Fixing
Screw
A+-2 B+-2 H+-2 a+-0.5 b+-0.5 d c+-2 h+-2
F1 71 68 91 54 -- M4 30 14 2
F2 80 90 105 57 71 M4 44 13 4
F3 90 100 115 64 79 M4 44 13 4


F-2000 SERIES
Output transformers for 2-pole tubes exclusive use, marking a constant loss 0.25db value for first
time for the output transformers. This fact was due to our attempt to have good selection of iron
core, sufficient margin for output capacity, and a success to reduce the primary winding resistance
to below 1/5 of the traditional level. Further, satisfactory results ware obtained for the frequency,
phase characteristics which were factors of inverse proportion.
Stock
Mark
Catalogue
No.
Impedance Frequency
Range
Output Primary Max
DC current
Primary inductance
Primary Secondary
o
F-2003 3.5K 8,16 30-100KHz 8W 100mA 13H
o
F-2004 5K 8,16 30-80KHz 8W 100mA 16H
F-2005 7K 8,16 30-70KHz 8W 100mA 21H
o
F-2006 2K 4,8,16 10-60KHz 10W 100mA 17H
o
F-2007 3K 4,8,16 10-60KHz 10W 100mA 25H
Insulation Resistance:DC500V 100M
Insulation Strength :AC1.5KV 1-minute

F Outer dimensions are as same as F-2020 series.


F-2020 SERIES
Output transformers for push-pull exclusive use for output 50W. in combination with
various kinds ofvacuum tubes including 5-pole and 3-pole tubes, these can be used
in many different circuits
Stock
Mark
Catalogue
No.
Impedance Frequency
Range
Output Primary Maximum
DC current
Primary Inductance
Primary Secondary Balance Unbalance DC 0mA DC 10mA
o
F-2020 3.5K
With UL tap
4,8,16
Cathode NFB winding
10-100KHz 50W 150mA*2 10mA 90H 60H
o
F-2021 5K
With UL tap
4,8,16
Cathode NFB winding
10-80KHz 50W 150mA*2 10mA 150H 70H
Insulation Resistance:DC500V 100M
Insulation Strength :AC1.5KV 1-minute

F2020


F-2010 SERIES
(Bilirite Series)

Output 100W push-pull exclusive use output transformers which can be used in combination with 5-pole tubes, 3-pole tubes and many other kinds of vacuum tubes in various circuits (F-2011, 2012)

Stock
Mark
Catalogue
No.
Impedance Frequency
Range
DC 0mA
Output Primary Maximum
DC current
Primary Inductance
Primary Secondary Balance Unbalance DC0mA DC10mA
o
F-2011 3.5K P-P
(With UL tap)
4,8,16
cathode NFB winding
5Hz-100kHz 100W 200mA*2 5mA 110H 80H
o
F-2012 5K P-P
(With UL tap)
4,8,16
cathode NFB winding
5Hz-80kHz 100W 180mA*2 5mA 210H 150H
o
F-2013 10K
(Single)
4,8,16 20Hz-500kHz 40W 100mA 50H(DC 100mA)
Insulation Resistance:DC500V 100M
Insulation Strength :AC2KV 1-minute

F-2010

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