Hammond 290BXX Vertical Cover 660Vct 138mA Power Transformer

The 290BXX is a 290 Series tube guitar amplifier power transformer described by the manufacturer as "290BX C/W VERTICAL COVERS", in other words the 290BX supplied complete with vertical covers. The series table lists it as the vertical version of the 290BX, with no single amp model assigned. It suits builders and technicians whose chassis layout calls for a vertically covered transformer.

Electrically it matches the listed 290BX ratings: a 120V @ 60 Hz primary, 660Vct @ 138 mA on Secondary 1, a 50V bias winding on Secondary 2, 6.3V @ 3A on Secondary 3 and 5V @ 3A on Secondary 4. The winding is paper.

The 290 Series was designed for drop in replacement of original units, with parts designed physically to look similar to original factory units where possible. The series also notes that material used and design specifications were kept as close as possible to the original part to preserve the stock "tone".

The 290BXX has a shipping weight of 5 lbs (2.27 kg). It is RoHS and REACH compliant, with UPC 623980397870 and UNSPSC 39121301. Compare it with the 290BX when deciding which cover style your amplifier requires.