"3.Are the audio filter options needed - would they enhance CW operation?? "
JMHO but I have a contrarian opinion on the KAF2. I installed one but resold it after several months of use. I do a lot of weak signal work on 160 and have probably tried about every audio filter known to man. The ONLY one which actually helped me was the Audio Peak Filter (APF) first implemented in Yaesu's FT-1000D as an analog circuit. Elecraft, Icom and others have now made digital clones of APF in their newer rigs (e.g. K3, KX3, etc). Besides APF, I don't believe there is a better audio filter than your natural ear/brain combination. I've often fooled myself into thinking others helped but when I switched them off, I found there was no real S/N improvement to my ears. Another issue I disliked about the KAF2 was the RFI generated by the clock. If the clock was enabled, there was a "chuff chuff chuff" sound in the audio that was quite annoying (not to mention clock drift, the complexity of setting time, etc). Here are a few audio mods that I've made to my K2: 1. TF3MA's sidetone mod. This cleans up the sidetone to a more pure sinusoid, allowing better zero-beating by ear. Without it, I found it easy to zero beat on a spurious product. The improvement also does not fatigue my ears as much as before during extended operating. This one is definitely worth doing in my opinion. 2. TF3MA's LF audio cutoff mod. 3. JG1XLZ's KSB2 audio quality mod. (not needed for CW). I don't have time to find links for these but you should be able to find them in a keyword search. They are all free and simple to install once you have the parts. 73, Bill W4ZV -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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 Message delivered to [email protected]
