Jensamp 51x Germanium Preamp

Projects > Jensamp 51x Germanium Preamp

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).


  • 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!


220€ for a complete kit (price without VAT)

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