Audioamp.eu ABF-Q Auto Bias For 4 Tubes With Filament Transformer
I bought 2 of these a few years ago and this one didn't get used.
The ABF-Q module from Audioamp.eu is an automatic bias control system designed for tube amplifiers with four output tubes, configured in push-pull (PP) or parallel push-pull (PPP) arrangements. It ensures optimal performance by dynamically adjusting the bias of each tube, maintaining strict current symmetry between the output stage branches, and preventing DC current flow through the output transformer. This approach minimizes low-frequency distortion and extends tube lifespan.
A notable feature of the ABF-Q is its integrated 6.3VAC isolation transformer, making it suitable for amplifiers where the 6.3 VAC filament supply is referenced to ground.
Sold
I bought 2 of these a few years ago and this one didn't get used.
The ABF-Q module from Audioamp.eu is an automatic bias control system designed for tube amplifiers with four output tubes, configured in push-pull (PP) or parallel push-pull (PPP) arrangements. It ensures optimal performance by dynamically adjusting the bias of each tube, maintaining strict current symmetry between the output stage branches, and preventing DC current flow through the output transformer. This approach minimizes low-frequency distortion and extends tube lifespan.
A notable feature of the ABF-Q is its integrated 6.3VAC isolation transformer, making it suitable for amplifiers where the 6.3 VAC filament supply is referenced to ground.
Sold
Attachments
Last edited:
