BA datasheet, BA circuit, BA data sheet: ROHM – Fm Stereo Transmitter,alldatasheet, datasheet, Datasheet search site for Electronic. Page 4. Page 5. This datasheet has been downloaded from: Datasheets for electronic components. Part, BA Category, Communication => Freq/Signal Converters/Generators. Description, FM Stereo Transmitter. Company, ROHM Electronics. Datasheet.

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Many hobbyists detested the BA when they tried datsaheet make it do what it was not supposed to do, making it the black chip of the FM Transmitter family. Is it available in India?

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Still the chip was fantastic in that it allowed you to transmit some kind of Stereo at the real low end. I connected the kit to my Kenwood CD and tuned it to We have had page loads since counter reset on 15 May One does have valid frequencies upto 53 KHz and their unwanted harmonics running around, along with the MHz carrier, warranting a board designed to RF standards.

The Decoder in the receiver will erroneously construe this as if there was an 8KHz signal originally present in the Audio. According to the way the FM standards were designed, one cannot transmit more than 15KHz as that would affect the 19 KHz pilot tone used to tell the receiver that the incoming signal is in stereo. Composite stereo signal is created by the stereo modulator circuit using the 38kHz quartz controlled frequency.


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Page started on 19 July Stereo FM transmitter circuit. The sound quality is good enough if you like loud Rock and Roll and are going to receive it on your small radio out on the porch while the kit’s connected to your CD player indoors. I could always tell between my Stereo signal and the pro signals next to it, but I could not tell dattasheet why.

But horrors, I put in only one channel of Audio and ground the other channel’s input. Inductor L1 and capacitor C5 is used to set the oscillator frequency.

ROHM – datasheet pdf

For that I would like two copies of 38 kHz quartz please. Suppose you have a 10 KHz Audio signal and it is clipped a bit, it will generate harmonics. To make matters worse, the music would modulate the high frequency tone. When you slightly overdrive a Mono signal, you get a slightly distorted output. I have a problem with this coil.

There is enough place to work around easily. Thank you in advance. I found I could cover my whole house and atleast mtrs out in the open. Professional gear would have a “brick wall” filter to remove all content above 15 KHz before feeding it to the MPX. I found that the stuff that one channel was putting into the other channel was low level but really distorted bad. The kit pre-emphasizes the Audio inputs passively.

C13 and C14 are just coupling capacitors, nothing to do with pre-emphasis. If one uses a monolithic IC to do all the work, one is limited in the amount of genius one can display using that chip. When you overdrive an MPX circuit, you are in for trouble big time. Or could it have been simple clipping?


C I ran a 20HzKHz sine wave sweep signal through. Previous post Next post. Add them up passively, just making sure they are in phase More complete method: Sound quality did improve a bit by reducing Modulation levels.

What is left in and right in. A The CK was much noisier to begin with.

However, what I liked best about the BA was the amount of excitement it created among the hobbyists. The PCB is very good quality and so are the components. I really wonder if this slight high frequency note was caused by lack of a double sided board and large ground areas? In the circuit Daasheet, C16, C14 and R6, C15, C13 forms the pre-emphasis network for the right and left channels respectively.

I had to put my equaliser’s bass buttons up a bit. Tuning was easy, The signal moved around by only 25 KHz initially till Thermal equilibrium was dattasheet. I need a BA IC. The Third Harmonic will be at 30 KHz.