Sorry for the seemingly blank post...have changed the mail so it is plain text instead of HTML...let's see if this makes it through this time...
Doug -- I use it all the time on my FT-1000D. If you're listening to a weak signal, you may or may not have it centered in the passband where when you reduce the bandwidth to 50 hz you still hear the signal. Yes, you can retune but that is an additional step... Also with an APF you may choose to peak the audio at a pitch different from what you typically use. Most people typically set the pitch on the K3 for 500 - 600 hz and forget it...but sometimes -- especially on weak signal, low band stuff -- you may want to listen to a really low tone which -- because of QRM or because it just happens to be more intelligible at the specific time you're listening. Yes, you can change the pitch and retune -- but all require more steps...when you may have a short window of opportunity on 160 meters...It may be just my personal preference...but it I think it is "doable" and could be made "software optional" for those who don't want it or prefer to operate in a different manner. 73 de Greg-N4CC On Thu Dec 31 11:24 , DOUGLAS ZWIEBEL sent: >RE: Audio Peak Filter requests > >A number of folks have asked for this, including some who have not >commented here. Many of these guys obviously used a "audio peak >filter" before, found it useful, and now miss it. > >As before, I have no issues with any requests, as long as they are >user-selectable as OPTIONS and not mandatory. > >But I have to ask why for this one. It has been my experience that >one uses an audio peak filter when the IF filtering is inadequate...it >is "another layer" of support (rejecting "unwanted" signals). But hey >guys...the stock K3 goes down to a 50hz bandwidth...at IF and AF (if I >understand the DSP correctly). Fifty HERTZ! > >I think that is a just as narrow (if not much narrower) and with as >steep skirts (if not steeper) than you will ever find on the Audio >Peak Filtering on any past or current radio. > >Not only can you narrow down the DSPs to 50hz, but you can also set >the "pitch" to whatever you like. Doesn't that do the same thing >(only better)? > >QUESTIONS: Are you sure that you actually need this? Have you tried >the method cited above? Why/how would an audio peak filter be >"better" or a further enhancement? > >Thanks and Happy New Year! >de Doug KR2Q >PS...recently I posed another such comment on a different topic and I >got some very good answers which taught me at least one new trick...so >this is definitely not a sarcastic question. >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: Elecraft@mailman.qth.net','','','')">Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ---- Msg sent via CableONE.net MyMail - http://www.cableone.net ______________________________________________________________ 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
