The Jensamp 51x is a version of the RCA BA71 preamp circuit with some modifications, including a DI input and improved output stage. Like the original BA71, it employs germanium transistors (parts kits come with NOS ASY26). As it runs on +/-24vdc, the Jensamp is compatible only with 51x Alliance racks, not 500-series. A limited number of kits and PCBs is offered (check links below for availability).

Features

• Option for Lundahl or Haufe transformers
• Vintage NOS ASY26 germanium transistors
• Compatible with 51x Alliance 511 racks
• Gold alodine front panel
• DI instrument input
• Limited number of kits!

Pricing

220€ for a complete kit (price without VAT)

Read More:

• The story of the original Jensamp
• Parts and PCBs available at the White Market
• The original development thread
• Build and support thread