455kHz #96 Filter
The INRAD #96 filter connects to the Connection Board that is located on the radio top, just behind the speaker.
•Remove the Connection Board.
•Remove the stock 3kHz filter – Labeled CFJ455K.
•Install a coax at each filter connection point, noting the shield connects to the circuit board ground.
•Install the Connection Board
•Solder the coax leads to the #96 filter, noting the shield connects to the filter ground. Either terminal set can be used for input or output.
•Install the #96 filter to the speaker bracket using Velcro type material. Access to the PLL board below the Connection Board requires removal of the Connection Board. Velcro type installation allows for easy access to the PLL Board.
o An alternate location is above connector CN403 on the side panel. This location is troubled by inductors L464 and L465 and can short to ground if contacting the bottom of the #96 filter. Again, Velcro material is used to allow access to the PLL Board.
Bench testing of the radio showed no circuit tuning was required after installing the new filter.
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