TS-2023-HIBU-MAINS

Power Transformer TS-project-2023

€ 111,32 (€ 92,00 tax exclusive)


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In TubeSociety-project-2023 we studied a new tube-amplifier concept where the driver stage is constructed with opamps and fets while twin power-triodes drive the toroidal output transformer.

The driver-section resembles the input circuit of the Trans-PP80 amplifier (see the audioXpress-May-2023 download below). However, its fet-current-course is now applied as a driver (with 150 Vac amplitude) for the low plate impedance 6AS7-GT twin-triode. The driver section is extremely linear, as is the low impedance ‘voltage-source’ drive of the OPT resulting in neglectable magnetic distortions. All segments of the amp are optimal clean due to their local feedbacks. Therefore none extra global feedback is needed for. To exclude that the power supply influences the audio quality, Joost created new Maida-power-supply circuits and PCBs.

The result? Like previous TS-year we notice the specious soundstage where stress is absent.

Please find all the details plus circuits in the description of the TubeSociety Project-2023.

The TS-2023-HIBU mains transformer contains all the windings to power the driver and tube output stage of a stereo amplifier. See the short-specs below.

Specifications TS-2023-HIBU-MAINS
Power: 140 VA
Primary: 2 x 115 Vac
Sec.-1: 225 V-ac / 370 mA-ac      [6AS7-GT section]
Sec.-2: 120 V-ac / 100 mA-ac      [6AS7-GT section]
Sec.-3: 6,3 V-ac / 5,5 A-ac             [6AS7-GT section]
Sec.-4: 2 x 18 V-ac / 200 mA-ac  [driver section]
Diameter: 120 mm
Height: 45 mm
Weight: 1,8 kg

Download: pdfTS-2023-HIBU-mains_specifications.pdf
Download: pdfAudioXpress May-2023: VDV-Trans-PP80

PCB’s: www.meten-en-aan-buizenversterkers.nl sections “projecten” and “PCB Webshop”
Applications: https://mennovanderveen.nl/index.php/en/tubesociety/projecten-tubesociety?view=article&id=190