>> I has tried replacing the 10uF caps with 100uF in AF-amp, also in >> data-sheet for LM4811MM we see grounded pin 10 have to add for 1uF cap. >> The result is excellent with my ProSet.
If anyone is going through the trouble of changing the 10uF caps at C9 and C13 on the front panel DSP Board, I suggest going to 330 uF to ensure that a broad range of headphones are covered, including old models with fairly Lo-Z drivers. http://www.n1eu.com/K3/k3audiomod.htm The National LM4811MM spec sheet notes that the bypass cap (Cb) value as described above is critical with respect to turn-on clicks and pops. >From the data sheet: "Capacitor Cb is the most critical component to minimize turn on pops since it determines how fast the LM4811 turns on." It's already at 10 uF. Before changing it, I would test for clicks/pops both ways to ensure that artifacts are not present. Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
