Complete Stereo AM Transciever

883

11:22:28

So I finally found out what my invention is called. Seems like back in the 80's someone had the same thought as me and called it the Kahn-Hazeltine system. Not a polar AM yet it serves a common function.
So this is the final version of the modulator. I've changed the oscillator since the one in my previous circuit was working only because of an EC glitch and wouldn't have worked in reality. I also found out that it has a few disadvantages over other stereo AM techniques. Looks like it has a very poor stereo separation at >5Khz reaching to none at 7Khz. Still it has a lot of advantages over other techniques like simplicity better use of the occupied channel etc.

Just added the modified detector circuit you'll need to demodulate and restore the original signal. Since the transmitter is modified so is the receiver.

published 11 years ago

Nikolay_S

11 years ago

Resistor is not needed at the top circuit.

Nikolay_S

11 years ago

Real PM modulator suppressed carrier frequency by 18 dB. It is necessary to reduce energy costs in the transmission.

thebugger

11 years ago

I keep telling you this is not a Polar Modulator. It's a Kahn-Hazeltine modulator. Although the goal may be similar the means of achieving it are different.

adreno

11 years ago

If its already the Kahn-Hazeltine system it's can't really be your invention now can it? Just splitting hairs here.

thebugger

11 years ago

It's not my invention but the fact ia that i thought of it without looking in the Internet for it which sorta makes it my invention too,doesn't it?

hurz

8 years ago

Yes, its your invention and its made from you fantasy. But unfortunately you havn't even tested it in simulation to see it does not work! Read what "sideband" is before being again a foulmouth.

hurz

8 years ago

And this @thebugger bla bla bla ... "I also found out that it has a few disadvantages over other stereo AM techniques. Looks like it has a very poor stereo separation at >5Khz reaching to none at 7Khz." This is a copy from wiki you never did this yourself, foulmouth asshole!

Prince12345

8 years ago

explain to me what is going on

hurz

8 years ago

@Prince12345 @adreno, to clarify for you. Buggzy found a text description about this Kahn-Hazzeltine thing, what he did not found is a schematics or circuit. So he dicided to reinvent something which is unfortunately not working. So its his invention, how he thinks, it is made, but epic fail in function. This seperating stereo disadvantage is exactly in this text written in wiki, so he just copied it and haven't found out by himself. But this circuit is not working at all, or try yourself and highpass this signal before you try to go on air. Tip, DC components can not be transmitted.

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