Portabellabz 208 Hub
The Hub makes it possible to plug 3 cards side-by-side to a 208 or Easel, or even up to 6 thanks the rear edge connector of the ToolBox series cards.
Passive Hub : the Hub’s power rails are connected to the 208/Easel’s +/- 15V rails. Most PSUs (BEMI/Buchla USA, 211r, Meanwell PD2515) should be able to power 3 cards or more this way.
Powered Hub : an optional +/-15V PSU is added to the Hub to avoid extra load on the Easel’s internal PSU. This solution is mostly intended for the early BEMI Easels with a weak internal PSU, the Hub daisy chains off the power brick supplied with the BEMI Easel so there is no extra wall outlet needed.
If you don’t know which PSU is inside your Easel, this simple test is a good indicator : insert – vertically, not at an angle, to avoid a short in the contacts – a card such as the 208 ToolBox or VCS3 Card, if the Easel’s oscillators pitch changes, the PSU is weak and a powered Hub is recommended.
A powered Hub can be used in any configuration and accepts DC input from 9V to 36V.