EveryCircuit - Stereo AM.

10 years ago

Any good idea to detect L and R channel assignment? Pilot carrier...

10 years ago

Won't a simple envelope detection circuit suffice ????

10 years ago

Yes sure, two of them one for positive lets sat "R" channel and one detector for left channel. But the signal on air looses its information about positive or negative voltage. At receiver the wave comes into the antenna from north east west.... And polarity does changed. It needs some method to easily detect e.g. channel R. Or for compatibility R+L channel and L-R. But this is a different thing ;-) how about a low frequency added sine wave to one of the channels?

hurz

10 years ago

BTW, we can simplify this http://everycircuit.com/circuit/6304756100759552

selman

10 years ago

woooooow !!! Nice simplification.....

2ctiby

10 years ago

@selman .....doesn't the reduced Hurz link model simply remove your previous power levels from your mA range down to his microA range by removing the op amps? Is any better channel differentiation proposed or is it just a put down of your efforts?

selman

10 years ago

The power is indeed low, but he got the waveform right....

2ctiby

10 years ago

@selman .....as Hurz said...thereis information loss in transit, but would such a loss be less if you were to retain your higher power....and was his waveform decidedly better to warrent the proposed reduction?

selman

10 years ago

I'm sure that hurz will agree if i say his version is better simplification wise, but not much better in other aspects...

2ctiby

10 years ago

So in effect it is no better, and I am wondering whether your higher power might be more advantageous regarding losses in transit. I am also wondering about how you might follow Hurz suggestion to

2ctiby

10 years ago

Continuation .... add a a low frequency pilot (agreed...a high is inappropriate for AM narrow band). Isn't it a better idea to alter the modulation rather than attempt such a low frequency pilot frequency...in which case your higher power might be back in play?

hurz

10 years ago

@selman do we need that 2cent pain in the ass guy?

2ctiby

10 years ago

@selman. You see Selman, Hurz is incapable of civil discussion with relevant points. He always pulls the superior knowledge in everything and no fair questions or points can ever be debated. He always enforses a superiority view without discussion. He has stepped in to stop my reasonable considerations....All the best in your efforts, but beware of subtly or abusevely being put down by Hurz....his 'help' always seems to offer no encouragement....only a put-down if you query anything.

selman

10 years ago

Hurz can sometimes be a PITA but he's a great guy to learn from... And I've seen comments and responses between you two on 2ctiby's circuits, you guys have to sit down and solve your problems !!!

hurz

10 years ago

@2cent, talking about "hurz" in 3. person is sick, abnormal and not what a community is for. Unlisted circuits can be commented with questions. If you fraud have any, and if your willing to understand and learn. But all this i dont see in your long lasting bullshit. The only what i see is a mega troll.

hurz

8 years ago

Unfortunately Mr 2cent killed that discussion and wasn't helpful at all and to see whats the real problem with this @thebugger invention is. I tried hard to bring @selman into the right direction to find out by himself that on air any DC information is loost! Test it yourself with a high pass filter 1pF 3Mohm and you can see the envelope which shows no more Left and Right channel separation! @thebugger's invention is just not working. Thread closed.

selman

8 years ago

Thanks hurz, good to hear from you.