Interesting. I had the opposite experience. I was on 40 meters yesterday afternoon for about 30 minutes. Signals were all pretty strong as Europe is just across the pond from my QTH. I did a lot of listening, comparing 1.1 KHz with 1.0 KHz and 550 Hz with 500 Hz. The difference of course, is that my 1 KHz and 500 Hz filters kick in. What I heard was a noticeable reduction in thumps, pops and AGC desensing as I stepped across the filter engagement boundary. There were a number of situations when I was at 550 Hz and could hear the other guy's signal being pumped up and down as my AGC was affected by someone 400 Hz away. I step down to 500 Hz, and the other guy's signal suddenly becomes smooth and consistent - no more AGC pumping.
- Keith N1AS - - K3 711 - -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Hachadorian Sent: Monday, February 23, 2009 9:52 AM To: Elecraft reflector Subject: Re: [Elecraft] So, anyone going to get more CW filtering? Last week I sold my 500 Hz filter, and ordered a 250 from Elecraft. On Friday night, the new filter hadn't arrived yet, so I operated in the CW DX Contest with only the 2.7K filter. It worked great! I couldn't see any difference between the 2.7K and the old 500. The skirts of the DSP (set at 300 BW) dominate over the filter skirts, and I never had one case of desensing or overload. On Saturday afternoon, the mailman delivered the new 250, and I installed it immediately and operated the rest of the contest with it. Once again, I couldn't see any difference. The radio sounded exactly like it did with the 2.7K and the 500. If you frequently feel the need to crank your DSP width way down below 300 Hz, you may benefit from the 200 filter, but I don't do that and don't plan to buy the narrow filter. Dave Hachadorian, K6LL Yuma, AZ ______________________________________________________________ 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
