300W British 6N oxygen-free copper OFC enameled wire ring transformer power amplifier 25V four-wire winding
The iron core of this transformer is produced and imported by Airlink in the UK. The 0.27mm thick non-breakpoint steel sheet has good winding quality. The primary and secondary coils are made of 6N oxygen-free copper OFC enameled wire with low internal impedance and temperature of 220 degrees produced by Rowan Cable Products Ltd in the UK. The secondary coil is wound, a high-quality high-purity copper film is added between the primary and secondary as a shielding layer, and a steel sheet of the same quality as the iron core is added to the outer ring as an outer layer to touch the shielding layer. The whole machine has strong anti-interference and noise isolation capabilities . The hand-wound secondary adopts balanced radial wiring method, double-wire parallel winding, etc. The consistency between the voltage and output current of each group can reach within +/-0.5%, there will be no vibration and noise, and each transformer will After the load, aging, insulation and other tests are fully qualified, they will be shipped.
The primary wire diameter is up to 0.8mm. Calculated according to 3A 1 square meter, this wire diameter can safely output up to 350W power, and the primary DC internal resistance is 3.6 ohms, which is lower than the famous brand transformers such as Talema and Porcupine with the same power. These imported transformers are generally 300W. The primary DC internal resistance is about 4.8 ohms. Since the iron core and enameled wire are very good, the quiescent current of each transformer is only about 7.7mA (Talema 300W is 16mA), the loss is small, and the adjustment rate is as low as 500W transformer level, only 6%. It can be seen that this This transformer is definitely an extremely high quality product. Diyers who have used the transformers I designed and made in the past know that what I sell is the details, materials, craftsmanship, and sound.
Specification:
Power: 300VA
Primary input voltage: AC115V AC230V can be customized
Secondary:
0-12V x 2 0.6A wire diameter 0.5mm
0-25V x 4 3A wire diameter 1.12mm (four wires are wound in parallel to ensure the same voltage for four groups, and can be used in series)
Primary DC Internal Resistance – <3.6R
Adjustment rate – 6%
Primary Wire Diameter – 0.8mm Temperature Resistance 220°C
Primary lead – 0.75mm square Taiwan Teflon silver plated wire, default length 30cm
Middle layer shield – high quality 0.06mm pure copper foil
Size: Approx. 115*57 MM
Weight: 2.7Kg
Secondary lead wire – If the enameled wire diameter is above 0.5mm, the default primary wire is used to lead out; if the diameter is less than 0.5mm, 0.5mm square Taiwan Teflon silver-plated wire is used to lead out, and the default length is 30cm
**Delivery mounting bracket
