| Home |
| Search |
| Today's Posts |
|
#17
July 30th 06, 06:38 PM
posted to rec.radio.shortwave
|
|||
|
|||
multipath distortion
On 30 Jul 2006 09:28:29 -0700, "N9NEO"
wrote: Sorry for being such a RX newbie here. I guess I shoulda stayed awake more during signals class. My expertise is very large switching and resonant power supplies and transmitters. So the multipath distortion causes fading of the carrier only?? This makes some sense to me. A small set of the lower sideband frequencies would also cause phase cancellation, but since the audio spectrum is moving around so fast no one notices. I think I'm on the right track here. So use another carrier slaved to the received carrier and you get better reception during fade. Even if it wanders a few cycles during fade you probably don't hear anyway. I guess that is how a sync detector works. I Imagine it would be a chore to build a sync detector from the ground up, but I would also think it must have already been put into an ic chip, no??? I like the link R2000swl posted to AmWindow for the precision full-wave rectifier. I think I'll stick it on a pc board and give it a try. If anybody wants a board let me know. They are very inexpensive. bm, or anyone else, if you have good link to ELPAF or alternative RX circuits then maybe I could throw that down on same board if not too much room. Details of board size at www.expresspcb.com I do the small one double side and no silkscreen 3 boiards 60bucks. You can contact me off board at 73 Bob N9NEO http://users.adelphia.net/~alexmm/Prod_det/detector.htm |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| Interesting Article | Shortwave | |||
| low distortion antenna amp | Homebrew | |||
| Antenna vs Ground - interesting article FWIW | Antenna | |||
| Reflection Delay is it real??? | Antenna | |||
| LQQKing for Construction Article | Antenna | |||
Threaded Mode
