Re: [Elecraft] Looking ahead to Field Day - roofing filter question
Julius Fazekas n2wn wrote: In my CW opinion, I would say you don't need a filter for FD use. While popular, it doesn't hold a candle to the harsh conditions during a 160M or major DX contest, such as CQ WW on 20M. Unless your antennas or operating environment can present signals approximately S9+30 to the K3's front end, there is NO need for ANY roofing filters other than the stock 2.7k. Also remember that 2.7k is already about twice as narrow as the narrowest roofing filters in the FT-1000 family *with* Inrad roofing filters, FT2000, FT9000, IC-7700, IC-7800, etc. Yes Icom and Yaesu claim to have 3k roofing filters but they have been actually been measured at ~5k by Sherwood and others. Advertising hype rules at these companies (as usual). 73, Bill -- View this message in context: http://n2.nabble.com/Looking-ahead-to-Field-Day---roofing-filter-question-tp2284018p2284129.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
Re: [Elecraft] Looking ahead to Field Day - roofing filter question
I use the 500 hz roofer set to cut in when the DSP gets around 750 hz. That eliminates a lot of the crud that comes through. That crud is the growling noise you hear in background of the other rigs when you tighten down their DSP. Buck k4ia k3 #101 In a message dated 2/6/2009 8:38:10 A.M. Eastern Standard Time, btipp...@alum.mit.edu writes: Julius Fazekas n2wn wrote: In my CW opinion, I would say you don't need a filter for FD use. While popular, it doesn't hold a candle to the harsh conditions during a 160M or major DX contest, such as CQ WW on 20M. Unless your antennas or operating environment can present signals approximately S9+30 to the K3's front end, there is NO need for ANY roofing filters other than the stock 2.7k. Also remember that 2.7k is already about twice as narrow as the narrowest roofing filters in the FT-1000 family *with* Inrad roofing filters, FT2000, FT9000, IC-7700, IC-7800, etc. Yes Icom and Yaesu claim to have 3k roofing filters but they have been actually been measured at ~5k by Sherwood and others. Advertising hype rules at these companies (as usual). 73, Bill **Great Deals on Dell Laptops. Starting at $499. (http://pr.atwola.com/promoclk/10075x1217883258x1201191827/aol?redir=http://ad.doubleclick. net/clk;211531132;33070124;e) __ 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
[Elecraft] Looking ahead to Field Day - roofing filter question
Bill, In my CW opinion, I would say you don't need a filter for FD use. While popular, it doesn't hold a candle to the harsh conditions during a 160M or major DX contest, such as CQ WW on 20M. The 500 Hz filter is a good choice for general contesting and semi-crowded conditions. For casual CW, you probably don't even need a special CW filter with the K3. The beauty of the uber-narrow filters in excessively crowded bands is that you can really kill most of the garbage outside of your filter's pass band. I think it's been stated here before, unless you have serious needs, like contesting, the K3 does great bare bones and added roofing filters are not necessary. I'll be hauling my K2 out for FD, love the all-in-one QRP package. 73, Julius Julius Fazekas N2WN Tennessee Contest Group TnQP http://www.tnqp.org/ Elecraft K2/100 #4455 Elecraft K3/100 #366 __ 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
[Elecraft] Looking ahead to Field Day - roofing filter question
I plan to take my K3 to Scorpion ranch for our annual WS4Y Field Day op. I have no roofing filters at present and frankly have been pretty well pleased in the little time I have spent in contest conditions. The DSP filters work quite well. Is it worth the money for a roofing filter and is the 500 Hz 5 pole filter adequate? Times are tough and money tight here so I want to make sure it's worth the $100! But I also would like to wow the other guys at FD =^D 73, Bill NZ0T -- View this message in context: http://n2.nabble.com/Looking-ahead-to-Field-Day---roofing-filter-question-tp2277699p2277699.html Sent from the Elecraft mailing list archive at Nabble.com. __ 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
