Ultralinear "1/2 Blackface" Mod Kit 1/2 Blackface Ultralinear Kit:70W UL Models If you order a Jupiter

If you order a Jupiter or Orange drop signal cap upgrade along with this kit

weak and thumpy

getting the correct kit with the correct instructions will make the experience better and easier

Flameproof 1W metal oxide resistors are used for the high voltage applications in the power supply

Ultralinear "1/2 Blackface" Mod Kit 1/2 Blackface Ultralinear Kit:70W UL Models If you order a JupiterThis is a great mod for those dreaded ultralinear Fender amps of the late 70s. All 135W & 70W silverface Fender amps are ultralinear, and quite different from their blackface & earlier silverface relatives. They are known for sounding colder and harder. Different transformers & power supplies make these amps impossible to truly blackface, but it is possible to get them to sound better and have a softer feel! These kits are easy to install and improve