18Vx2 300VA Toroid Transformer DIY HiFi Audio Power Amp

You are bidding on a new 300VA toroidal transformer(Antek AN-3218). It is precisely made for high-end power amp or CNC equipment. It has very low power loss and magnetic leak. Labeled input 115 + 115 Vac (Dual coils) and outputs 18Vac x 2 (dual coils). It has CE certified. Mounting hardware is included. The test results are excellent. (note: Please increase 10% of rated power when this transformer use in 60 Hz power source)

Open Circuit Test (core loss test):

TEST CONDITION: Apply variable voltage to primary coil (115V terminals) from 115-180VAC at 60Hz. No load on secondary coils.
1. Primary V = 120VAC, Primary I = .03A or core loss is 3Watt.
2. Primary V = 140VAC, Primary I = .07A or core loss is 8Waat.

Short Circuit Test (copper loss test):

TEST CONDITION: Apply variable voltage to primary coil (115V terminals) from 1-20VAC at 60Hz and short circuit on secondary coils. The test result is 7.8V and 2.75A or 22Watt which is the maximum rated copper loss

Dielectric Test:

TEST CONDITION: Apply dielectric meter between primary coils and secondary coils; and increase voltage up to 3500VAC. No initiate any spark.

Load Test Result:

TEST CONDITION: Input 115VAC 60Hz to the primary coil; parallel 2 secondary coils, 5 ohm 250W resistors as dummy load and room temperature at 25 degree C. Temperature rises 5 degree C after an hour test at load test #3.
1. Primary I = 0.02A, Secondary V = 18.1VAC at 0.0A, Power = 0 Watt
2. Primary I = 1.45A, Secondary V = 17.6VAC at 8.50A, Power = 149 Watt
3. Primary I = 2.92A, Secondary V = 17.1VAC at 16.2A, Power = 278 Watt

Dimension – 4.8” Diameter x 2.9” High.
Weight – 7.3 LB net.
Wire lead – 12” color-coded.

If you have more technical questions, please visit antekinc.com or e-mail to antek1000@yahoo.com.