The CBLK DC Blocks are designed to block dc voltage while passing frequencies from 300 kHz to 3 GHz. They produce a flat frequency response and specify an insertion loss of 0.02 dB at 300 kHz and 0.2 dB at 3 GHz. Input voltage is rated at 16 WVDC maximum and operating temperature ranges from -55°C to +90ºC. For more information, call CRYSTEK CORP., Fort Myers, FL. (800) 237-3061.