RE: how would i use this?

Posted by openmind (A) on January 22, 2024 at 09:13:08

In Reply to: RE: how would i use this? posted by ltman on January 21, 2024 at 21:53:40:

The symptoms you describe sound a lot like IBOC noise. The best documentation on that is on Brian Beezley's page below.

http://ham-radio.com/k6sti/hdrsn.htm

The good news is that your Scott has oscilloscope outputs. One of those is the FM detector output. That can drive the external decoder.

I've used that decoder and I suspect it will reduce or eliminate your problem. You can also add a post-detection filter before the decoder.

The bad news is that the LM 4500 chip is out of production. I don't know whether Mr. Fitzgerald is still offering the chips and boards. It would be best to contact him directly through that site. Good luck!

https://www.usaudiomart.com/details/649544801-hh-scott-lt-11 (Open in New Window)

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Follow Ups Full Thread

Topic - how would i use this? - ltman 10:28:42 01/19/24 (15)

RE: how would i use this? - ltman 17:13:34 01/27/24 (3)

RE: how would i use this? - openmind 10:15:46 01/30/24 (2)

RE: how would i use this? - ltman 19:58:26 02/03/24 (1)

well it works I guess - ltman 21:37:52 02/05/24 (0)

RE: how would i use this? - ltman 11:59:10 01/27/24 (0)

IF the LT-112B has a detector output, you can use an external MPX unit - mhardy6647 16:44:55 01/20/24 (0)

RE: how would i use this? - 6bq5 12:29:21 01/20/24 (8)

RE: how would i use this? - ltman 11:59:24 01/21/24 (7)

RE: how would i use this? - 6bq5 12:42:36 01/21/24 (6)

RE: how would i use this? - ltman 21:53:40 01/21/24 (5)

RE: how would i use this? - openmind 09:13:08 01/22/24 (4)

RE: how would i use this? - openmind 14:09:32 01/22/24 (3)

RE: how would i use this? - openmind 20:08:33 01/22/24 (2)

RE: how would i use this? - openmind 20:12:40 01/22/24 (1)

and it seems there are plenty of LM4500s available on the bay - ltman 12:15:04 01/27/24 (0)

Follow Ups

RE: how would i use this? - openmind 09:13:08 01/22/24 (4)

RE: how would i use this? - openmind 14:09:32 01/22/24 (3)

RE: how would i use this? - openmind 20:08:33 01/22/24 (2)

RE: how would i use this? - openmind 20:12:40 01/22/24 (1)

and it seems there are plenty of LM4500s available on the bay - ltman 12:15:04 01/27/24 (0)

RE: how would i use this?

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