TubeSociety currently pays attention to small-power-tube-amplifiers, like single ended or push-pull amplifiers with EL84 / 6V6 / E34L and so on. Their results will be published around September 2022 in the TubeSociety Project-2021 reports. For such small power amplifiers (around 10 Watt) a special power transformer (MAINS-B) was developed.
Its anode-voltage B+ winding delivers 230 V-ac, which results in 322 V-dc after rectification and buffering. This winding has an ac-current capacity of 160 mA-ac. After rectification and buffering the maximum dc-current equals 100 mA-dc. These B+ voltage and current allow amp designs with an mono output power up to 15 Watt (PP) or 8 Watt (SE) or stereo 2 x 5 Watt .
For trimming the quiescent currents with negative bias voltage, an extra 25 V-ac winding is present. Also two separate filament voltage windings with 2,5 A current capacity each allow multi power tube application with separate filament supply for the driver stage.
Primary: 230 V-ac
Sec.-1: 230 V-ac / 160 mA-ac
Sec.-2: 6,3 V-ac / 2,5 A-ac
Sec.-3: 6,3 V-ac / 2,5 A-ac
Sec.-4: 25 V-ac / 100 mA-ac
Diameter: 80 mm
Height: 56 mm
Weight: 1,3 kg
Applications : check this website around September 2022; see TubeSociety section TubeSociety-Projects