SSB 2.3Khz Filter for the FT-897, FT-857 and FT-817

Installing & Testing the filter

[@tx2sturgis]

Remember, the built-in DSP filtering in the 897 is in the AF stages, and the optional filters function in the IF stages. Big difference.

[@M70ACARRY]

Mostly helps transmit audio

[@jgwimmer]

Ok, why did you shoot this video in a dark room other than your 1 light shining on the board?