Drip Electronics Opto4 & Opto5

Projects > Drip Electronics Opto4 & Opto5

The Opto5 is the latest version of Drip’s LA2a-based optical-compressor PCB. The Opto5’s most significant upgrade from previous versions is the addition of three release speeds. In addition to the Opto5 PCB, Drip offers preassembled T4B optical cells. Rack cases for this project are sold by DIY-Racked.

Notable Features:

  • Ground plane and full star grounding
  • On board power supply and tube heaters
  • Sowter transformers mount directly to PCB
  • Option for Lundahl LL1922 and LL5402 transformers
  • Employs dual T4B optical cells (also available from Drip)


  • $250 including 3 pairs of T4B cells for each release speed

For more information visit www.dripelectronics.com.