It’s not the whole truth though, as [Albert van Dalen] demonstrates with his tube preamplifier running from only 3.3 V. If your first thought is that he must have made a flyback converter to ...

Electronic bass and treble circuits allow for volume ... Pricing & Availability: The C55 Solid State Preamplifier and C2800 Vacuum Tube Preamplifier are available via authorised McIntosh dealers.

[Justin Scott]’s tube preamplifier is a great example, with its novel use of a pair of Nixie tubes to indicate the volume to which it has been set. The audio side of the preamp comes courtesy of ...