A premium transformer kit for EL84 push-pull amplifiers—DIY-friendly, reliable, and designed for outstanding sound quality.

It’s an ideal starting point for both first-time and experienced builders.

The technical features:

Power Transformer:

Primary voltage: 230/240Vac/50Hz OR 120Vac/60Hz (Please state the primary voltage suitable for your country)

Secondary voltages: 0-230-240-250-260Vac /300mA

6.3Vac/5A

6.3Vac/1A

Core size:EI96/50

Weight :3Kgr

Mounting: drop through chassis

Output Transformers:

Primary Impedance: 8K

Secondary Impedance: 4/8 Ω

Ultralinear tap : 25%

Maximum output power : 17W

Frequency Response: 10Hz-96Khz -3dB

Core material: high quality grain oriented silicon steel M6 (19Kilogauss)

Core size : EI75/30,

Lamination thickness /0.35mm

Weight 1.2Kgr per transformer

Choke:

Inductance: 2H

Airgap set at :250mA ( the airgap is optimized for keeping the inductance stable over DC current variations more than 250mA rated working current)

DC resistance :62Ω

Max current:400mA

Core size:EI48/16

A high-quality, beginner-friendly transformer kit for EL84 single-ended amplifiers—easy to build with, delivering excellent bandwidth,and outstanding sonic detail.

The technical features:

Power Transformer:

Primary voltage: 240Vac/50Hz OR 120Vac/60Hz (Please state the primary voltage suitable for your country)

Secondary voltages: 0-230-250Vac /200mA

6.3Vac/3.5A 

Core size:EI84/40

Weight :2.1Kgr

Mounting: Vertical

Output Transformers:

Primary Impedance: 5K

Secondary Impedance: 4/8 Ω

Ultralinear tap : 25%

Primary Inductance Lp=40H @17Vrms/50hz

Airgap set for : 35mA

Primary Dc resistance: 255 Ohm

Max Dc current :150mA

Maximum output power : 7W

Frequency Response: 8Hz-40Khz -3dB at 1W output power

Core material: high quality M6 grain oriented silicon steel (19000Gauss), made in Europe.

Core size : EI75/25

Lamination thickness: 0.35mm

Choke:

Inductance: 15H

Airgap set at :120mA

DC Resistance :270Ω

Max current: 200mA

Core size:EI60/30