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+ | ====== CW Filter Model FR4 ====== | ||
+ | {{fr-4.jpg?150|}} | ||
+ | ===== Description ===== | ||
+ | The FR4 filter is for use between receivers or transceivers, and high impedance headphones. It is a passive audio filter centered around 850 Hz. A switch is included to completely remove the filter from the headphone line for phone reception. | ||
+ | |||
+ | ===== Specifications ===== | ||
+ | ***Center Frequency:** 850 Hz | ||
+ | ***Bandwidth at 6 dB Down:** 400 Hz | ||
+ | ***Bandwidth at 60 dB Down:** 2.4 KHz | ||
+ | ***Input Impedance:** 2000 ohms | ||
+ | ***Output Impedance:** 2000 ohms | ||
+ | ***Insertion Loss:** Less than 3 dB | ||
+ | ***Size:** HWD 2-1/2" x 4-3/4" x 6" | ||
+ | ***Shipping Weight:** 1 lb 12 oz | ||
+ | ***Finish:** Baked enamel case, molded plastic side panels with wood grain inserts |