This past week, I received the printed circuit boards (PCBs) for the v2.2 Stepped Attenuator. The attenuator includes all the improvements listed in my March 18th post. There were 51 boards in the shipment; this is enough to build two motorized attenuators and two headless attenuators. My plan for the next few days (Ok weeks) is to populate the boards and test the complete attenuators in the glass/aluminum version of the vacuum chamber.

With any luck these will be the first fully functional versions of the vacuum based stepped attenuator.

Wish me luck…

Knock on wood…

Control board for the DÆ Stepped Attenuator v2.2.