> I found the APF in my Icom 7800 worthless. Same here. Icom's implementation of APF in the '7700/'7800 is really an "Audio Passband Filter" with low Q. It's really no different than narrowing a DSP passband filter.
What's unique about the FT-1000D's APF is that the Q is very high, although its affected with APF tuning. The high Q of the circuit forms a very narrow filter with fixed gain, and variable peaking frequency. Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
