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Commentary

Auto transformer with large core volume.

15067 has a wide range and can usually be used with 70 or 140 v lines.
Almost all impedance matching can be performed by changing the connection, and the frequency range is 30 Hz to 15 kHz.

Insertion loss is also minimized.

Model Rating

Type	Autotransformer
Frequency characteristic	30 Hz to 15 kHz
Insertion loss	0.3 dB (70 V Line)
Operating current	2.2A (per coil)
Maximum allowable operating current	4.4A (overall, maximum output = maximum voltage x maximum input current)

15067 Allowable Values and Connection Method of Auto Transformer
		Operating line and maximum output		Input terminal	Load terminal	Impedance ratio	Voltage ratio	Maximum output current
		30Hzminimum	60Hz minimum
step down		70V at 150W	140V at 300W	1&4	1&2 or 2&4	1:0.25(1/4)	1:0.5(1/2)	4.4amp
		70V at 150W	140V at 300W	1&4	1&3	1:0.5(1/2)	1:0.7(7/10)	3.1amp
		70V at 50W	140V at 300W	1&4	3&4	1:0.062(1/16)	1:0.25(1/4)	2.9amp
step up		50V at 150W	100V at 300W	1&3	1&4	1:2	1:1.4(1-2/5)	2.2amp
		35V at 150W	70V at 300W	1&2 or 2&4	1&4	1:4	1:2	2.2amp
		17.5V at 50W	35V at 100W	3&4	1&4	1:16	1:4	0.75amp

	Parallel connection 70 v, 300W line 4, 8 Ω
	Serial connection 140 v, 300W line 16, 32 Ω
	Split connection 70 v, 80W line 8, 16, 32 Ω