Home » DC Blocks DC Blocks January 17, 2011 No Comments Inner Only, Outer Only, Inner-Outer, Special Models (High Voltage, Broadband, 75 Ohm, Blocking Attenuators, Terminations and Connectors). DC Blocks are used to block the dc current in a signal path. Post a comment to this article Name* E-mail (will not be displayed)* Subject Comment* Report Abusive Comment Thank you for helping us to improve our forums. Is this comment offensive? Please tell us why.