When tasked by a buyer to create an amplifier that appears pretty much as good because it sounds, Keri Szafir rose to the event. Szafir, a classic audio gear fanatic, achieved each targets whereas constructing the Little Crimson Satan tube amplifier utilizing components available.
The Little Crimson Satan is a single-ended Class-A amplifier constructed round an EL84 vacuum tube. If the EL84 doesn’t sound acquainted, you may realize it because the 6Bq5. These tubes have a mixture of value, energy degree, and sound high quality, making them a favourite in amplifier designs. Even with the previously-used EL84 tube, the Little Crimson Satan produces an output energy of eight watts.
Szafir aimed for a constraint of not drilling any further holes within the enclosure. One instance of avoiding further holes comes from the distant management. The top person can practice the amplifier to a selected distant’s buttons for max flexibility. Nevertheless, this function means the ATTiny45 wants to enter a “programming mode.” As an alternative of drilling a gap and mounting a button, Szafir used a reed relay. Now the end-user can place a magnet close to the reed swap to activate the programming mode!
Whereas many initiatives we function contain printed circuit boards or protoboards, the Little Crimson Satan has era-appropriate point-to-point wiring. That small element provides a little bit of appeal since this amplifier additionally accepts audio Bluetooth alerts!
One distinctive construct resolution includes the ability provide. It’s an exterior field from the amplifier circuit. It incorporates the transformers and management circuit. It offers the Little Crimson Satan’s tube part a compact look whereas nonetheless delivering an audio punch.
Whereas the venture web page write-up is an effective description, Szafir created a set of YouTube movies earlier than delivery the amplifier to the client. The video above is a superb overview of the amplifier and its hand-drawn schematic. And for much more element, right here is the full story behind creating the Little Crimson Satan.
