Author Topic: RF trnsmitter yung pang FM radio (Read 1564 times)

necoleis · « **on:** January 30, 2008, 12:43:10 AM »

meron po ba kayong schematic ng RF transmitter na pang FM radio? Paki post naman po

necolei

Philippine Electronics Forum · « **on:** January 30, 2008, 12:43:10 AM »

paranz · « **Reply #1 on:** January 30, 2008, 12:48:53 AM »

i-google mo na lang siguro marami eh..

if you are interested to build one, hanap ka ng circuit na may electret mic. (ECM) and using 2-3 transistors. Good project na yan.

Philippine Electronics Forum · « **Reply #1 on:** January 30, 2008, 12:48:53 AM »

necoleis · « **Reply #2 on:** January 30, 2008, 12:55:50 AM »

pwede rin po bang i connect ang mp3 player dun? yung pong parang mey radio station ako pero sa bahay lang or sa kotse hehehehe.

necolei

Philippine Electronics Forum · « **Reply #2 on:** January 30, 2008, 12:55:50 AM »

paranz · « **Reply #3 on:** January 30, 2008, 01:02:48 AM »

yeah pwede. alisin mo lang ang ECM ok na yan

Philippine Electronics Forum · « **Reply #3 on:** January 30, 2008, 01:02:48 AM »

necoleis · « **Reply #4 on:** January 30, 2008, 01:05:52 AM »

salamat po. naka kuha na po ako ng link ng FM Radio transmitter. share ko lang po.

http://www.electronickits.com/kit/complete/surv/ck200.htm completo yan with schematic just download the PDF file

necoleis

Philippine Electronics Forum · « **Reply #4 on:** January 30, 2008, 01:05:52 AM »

paranz · « **Reply #5 on:** January 30, 2008, 01:33:53 AM »

good find.. thats one of the simplest FM transmitter around, and it uses reactance modulator technique for FM modulation.

the circuit is not really good though, since first transistor amplifier stage (the ECM preamp) uses a self-bias circuit which is very sensitve to transistor gain variation. Half of the time the circuit will not work as well as advertised.

Born2BeWired · « **Reply #6 on:** January 30, 2008, 10:54:06 AM »

Quote from: necoleis on January 30, 2008, 01:05:52 AM

salamat po. naka kuha na po ako ng link ng FM Radio transmitter. share ko lang po.

http://www.electronickits.com/kit/complete/surv/ck200.htm completo yan with schematic just download the PDF file

necoleis

This kit does not have any frequency stabilizing circuit. Just about anything will throw its frequency off mark.

It will work fine with old analog type FM receiver equipped with AFC (automatic Freqency Control) function. But (I suspect) making it work it newer PLL FM receiver will be a challenge.

Mayor Johnaray · « **Reply #7 on:** February 03, 2008, 02:30:11 AM »

Ehem bili ka na lang sa CDRKing

Ito link http://www.cdrking.com/local/products/index.php?action=mnu&temp=2&typeno=7294644-366654-481500020-0550430&prod=FM%20Modulator/Transmitter

Mas makakamura ka pa kaysa mag assemble ka pa.

Pero kung gusto mo talaga mag assemble meron nyan sa ALEXAN sa RAON or sa DIVISORIA

Philippine Electronics Forum · « **Reply #7 on:** February 03, 2008, 02:30:11 AM »

Philippine Electronics Forum