tag:blogger.com,1999:blog-1592992209402300549.post4337003337148208257..comments2024-03-29T09:08:47.702-04:00Comments on The Silicon Graybeard: Radio Sunday #2 - Radios Get Sensitive, but Not in the SJW WaySiGraybeardhttp://www.blogger.com/profile/00280583031339062059noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-1592992209402300549.post-13546119349174769722019-04-08T01:03:29.332-04:002019-04-08T01:03:29.332-04:00And do we get to talk about the importance of a lo...And do we get to talk about the importance of a low noise L.O., and the wonders of mixer products?<br /><br />drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-41134915626350747572019-04-07T23:12:53.858-04:002019-04-07T23:12:53.858-04:00No fair getting ahead of me ;-) I figured I had t...No fair getting ahead of me ;-) I figured I had to introduce superhets and IF strips before going to Zero-IF radios. <br /><br />SiGraybeardhttps://www.blogger.com/profile/00280583031339062059noreply@blogger.comtag:blogger.com,1999:blog-1592992209402300549.post-91833651543977699832019-04-07T22:00:25.411-04:002019-04-07T22:00:25.411-04:00I've tinkered a bit through the years with reg...I've tinkered a bit through the years with regen sets, and some are very good, and some not so hot, at demodulating SSB. Bruce Vaughn, NR5Q (SK), who used to write for Electric Radio, was quite a whiz at regen and super-regen sets, and had published many designs.<br /><br />The build a good one takes lots of little tricks, and he'd figured them out to the nth degree. One of these days I might try to reproduce one of Bruce's sets.<br /><br />Many QRP rigs now use Direct Conversion receivers, and even some of the little "SDR" kits are Direct Conversion to I and Q signals, and then the software takes over.drjimhttps://www.blogger.com/profile/05647484115197408897noreply@blogger.com