BA1404 based stereo coder..

[DigitalJunkie]

Hey guys..

I've got a BA1404 based stereo coder circuit mostly built up.I know it's not the best solution,but I had the chip around,so I figured what the heck.I'm not planning on using the RF stage,just the stereo coder half,and I'll extract the MPX signal from there.
I may buffer/filter them aswell with a couple op-amps before mixing.(I've read this can help signal/sound quality alot.)Basically it said that even minor overdeviation can cause big harmonics and phase shifts in the mpx circuitry,etc and will cause treble distortion,and possibly some nasty stuff in the RF signal and subcarriers.


Anyways,I'm wondering about the values C7/C8 in the original FM10 (inplace of the 38khz crystal.) I'm hopeing to go that route for now(for testing,etc.),untill I can find a crystal.

Which brings me to...
Will Ramsey sell me a 38khz crystal? and how much are they? smile.gif

Also,if anybody has any tips on building this thing,I'd love to hear them!
Thanks!

[ April 07, 2004, 12:19 AM: Message edited by: DigitalJunkie ]

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