multiplex decoder chips

Radio Road

Which tuner to get and getting the most from it. Thank God, for the radio!

Posted by stellavox (A) on September 24, 2015 at 14:06:55

In Reply to: RE: Sherwood tuner posted by Eli Duttman on September 23, 2015 at 17:45:25:

Ely,

For what it's worth, the LM1800 is what I refer to as a "first generation" multiplex decoder IC. There was a second generation that had better all-around specs - like lower THD and higher separation. I believe the Sanyo LA3361 was one but there were a few others - Hitachi and Rohm come to mind as manufacturers. I also remember that some were "pin for pin" compatible with the 1800. Have no idea what few if any of them may be found found today.

Circuitry was very simple compared to the discreet units and as your diagram shows - only one "simple" adjustment ("free running" 19Khz oscillator) is necessary - as the note indicates.

Charles

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Follow Ups Full Thread

Topic - Sherwood tuner - Audiogabby 16:56:26 09/23/15 (16)

RE: Sherwood tuner - Audiogabby 07:40:54 10/24/15 (0)

RE: Sherwood tuner - Audiogabby 17:23:31 10/08/15 (1)

I've still got one in a box upstairs :-P - mhardy6647 14:30:44 10/09/15 (0)

I'd like to agree with but add to mrhardy's thoughtful and apposite post - Timbo in Oz 23:50:28 10/06/15 (0)

well - mhardy6647 05:55:47 10/05/15 (3)

Quick comment and question - caffeinator 13:11:53 10/08/15 (2)

found it - caffeinator 18:14:32 10/08/15 (1)

Good :-) - mhardy6647 18:24:16 10/08/15 (0)

RE: Sherwood tuner - geezerrocket 09:49:00 09/30/15 (1)

RE: Sherwood tuner - kbuzz 12:56:51 01/04/16 (0)

If radio is important to you investing in a directional antetnna with gain is a good idea. - Timbo in Oz 15:20:40 09/27/15 (0)

RE: Sherwood tuner - HoosierAudio 16:50:51 09/24/15 (1)

RE: Sherwood tuner - Audiogabby 18:02:44 09/24/15 (0)

RE: Sherwood tuner - Eli Duttman 17:45:25 09/23/15 (2)

multiplex decoder chips - stellavox 14:06:55 09/24/15 (0)

RE: Sherwood tuner - Audiogabby 05:04:25 09/24/15 (0)

Follow Ups

multiplex decoder chips - stellavox 14:06:55 09/24/15 (0)

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