egulator, including 2x25VA Talema
mains transformers on the PCB. The 290 is using fast recovery diodes in the power supply and only FETs
(JFETs and MOSFETs) in the regulators. It delivers 2x +/-24V regulated voltage at 200mA with the
Talema transformers delivered. Other voltages are available on request.

The set-up procedure consists of adjusting the output voltage to the desired value. For +/-24V connect
2x220 Ohm/5W resistors to the outputs. Connect a DVM across one of the resistors. Adjust the output
voltage to the desired value with trimpots P1/P2. If you have an oscilloscope and/or an audio µV meter,
connect them across the load resistors and check the residual hum/noise. The scope should not show any
ripple and the µV meter should show less then 5µV of noise over the audio bandwidth.

NOTE: The kit is delivered with C19-C26=35V caps for +/-24V regulated voltage. For higher output
voltage 50V caps are recommended!

The EB-117/290 design is the intellectual property of Erno Borbely/BORBELY AUDIO. Commercial
use and duplication in any form is prohibited.