tag:blogger.com,1999:blog-13762514.post116391760433081897..comments2023-05-29T06:15:35.077-07:00Comments on cobalt pet shortwave / mediumwave weblog: mediumwave images on the sw7600grweatherallhttp://www.blogger.com/profile/02060409107575801741noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-13762514.post-1167157281801395582006-12-26T10:21:00.000-08:002006-12-26T10:21:00.000-08:00People always tend to expect perfect image rejecti...People always tend to expect perfect image rejection from dual conversion sets - in fact, it's limited by the filter on the first IF and leakage around it. The Sonys are a particularly good example with less than 40 dB of image rejection. Something employing frontend tracking (rather than a wideband frontend) on MW/LW would have no problem improving this by 20+ dB, all the more the lower the received frequency is. Try an analog set with MW/LW coverage and decently large antenna next to the 7600GR as a "booster".Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13762514.post-1164526704191702122006-11-25T23:38:00.000-08:002006-11-25T23:38:00.000-08:00Dean:That's an interesting thought. I want to inv...Dean:<BR/>That's an interesting thought. I want to investigate that further when I have the time.<BR/><BR/>Thanks for the link to your longwave findings!weatherallhttps://www.blogger.com/profile/02060409107575801741noreply@blogger.comtag:blogger.com,1999:blog-13762514.post-1164526465855369072006-11-25T23:34:00.000-08:002006-11-25T23:34:00.000-08:00To Anonymous:I haven't spent much time evaluating ...To Anonymous:<BR/>I haven't spent much time evaluating the FM selectivity on my S10 MK2 yet. A quick scan through the FM dial suggested to me that it was better than the WRX911. I'll try to find the time to do some more in-depth comparison. This is an interesting area for FM reception; some of the stations above 100 mhz have images on cheaper FM radios that I own.weatherallhttps://www.blogger.com/profile/02060409107575801741noreply@blogger.comtag:blogger.com,1999:blog-13762514.post-1164503538645225922006-11-25T17:12:00.000-08:002006-11-25T17:12:00.000-08:00910 is 2 x 455kHz, which does sound like a single ...910 is 2 x 455kHz, which does sound like a single conversion. Could the AM broadcasters be getting into the final mixer directly, without going through the other stages? I have this problem as well with the Degen 1103.<BR/><BR/>My experience with longwave is that it is location specific--my apartment (in Chicago) is the best place for it I've tried; on a campus roof it's a mess; and in Las Vegas there is nothing on LW save LORAN-C at 100kHz. Whereas in Chicago I pick up at least 4 or 5 beacons (see <A HREF="http://dwarmstr.blogspot.com/2006/09/longwave-radio-beacons.html" REL="nofollow">here</A> for those).Dean W. Armstronghttps://www.blogger.com/profile/01775475819534188248noreply@blogger.comtag:blogger.com,1999:blog-13762514.post-1163969214263270722006-11-19T12:46:00.000-08:002006-11-19T12:46:00.000-08:00Besides battery life, what do you like about the I...Besides battery life, what do you like about the ICF S10MK2? I like my 7600GR too, but on FM it lacks enough selectivity for me. The E5 is much better in this regard. Is FM any better on the ICF S10MK2?Anonymousnoreply@blogger.com