Author Topic: Needed: 5Watt FM transmitter diagram (Read 2715 times)

flatdish2 · « **on:** February 21, 2008, 03:02:34 PM »

mga sir,,pa share nman po kung sino may diagram ng 5w fm transmitter...salamat po...

Philippine Electronics Forum · « **on:** February 21, 2008, 03:02:34 PM »

wheeler · « **Reply #1 on:** February 29, 2008, 10:54:07 AM »

check mo to sir..http://english.cxem.net/radiomic/bug13.php
3 watts lang pero malakas na rin basta gamit ka ng magandang antenna.

Philippine Electronics Forum · « **Reply #1 on:** February 29, 2008, 10:54:07 AM »

zer0w1ng · « **Reply #2 on:** February 29, 2008, 11:27:53 AM »

Quote from: flatdish2 on February 21, 2008, 03:02:34 PM

mga sir,,pa share nman po kung sino may diagram ng 5w fm transmitter...salamat po...

What frequency? 100MHz?
Look in here: http://www.epanorama.net/schematicsforfree/Radio/index.php
There is a 4Watt 100MHz FM transmitter there.

Philippine Electronics Forum · « **Reply #2 on:** February 29, 2008, 11:27:53 AM »

Born2BeWired · « **Reply #3 on:** March 01, 2008, 10:26:56 AM »

If you are new to RF, pick a project with detailed construction procedures, and follow these instructions to the letter (clone, if you will). In RF, lalo na medyo mataas ang RF power output na gusto mo, every details counts. Ground planes, shielding, and components/PCB layout becomes essential parts of the circuit.

Para sigurado, yung mga galing sa mga reputable publications or HAM organizations tulad ng ARRL (ARRL Handbook), QST magazine, CQ magazine. Do not waste your time on RF circuits tested only using simulations.

Philippine Electronics Forum · « **Reply #3 on:** March 01, 2008, 10:26:56 AM »

flatdish2 · « **Reply #4 on:** March 03, 2008, 11:14:28 AM »

maraming salamat sa inyong lahat...

Philippine Electronics Forum · « **Reply #4 on:** March 03, 2008, 11:14:28 AM »

rommelpm · « **Reply #5 on:** May 29, 2008, 06:25:05 AM »

Quote from: zer0w1ng on February 29, 2008, 11:27:53 AM

What frequency? 100MHz?
Look in here: http://www.epanorama.net/schematicsforfree/Radio/index.php
There is a 4Watt 100MHz FM transmitter there.

Tanong ko lang mga 'Bro, paano ba napapalakas ang power output nang transmitter ano ba ang dapat i-adjust dito? Dun kasi sa mga basic transmitters ay may LC Oscillator at the output which is tuned to a certain frequency...and I suspect that the adjustments will be on the LC tank circuit... $:-\$

secondly, pano ba mako-compute o ma-aaproximate kung gaano kalayo puwedeng ma-transmit ang signal.

zer0w1ng · « **Reply #6 on:** May 29, 2008, 08:43:52 AM »

You have to match the impedance of the output to the impedance of the antenna to have a maximum power transfer possible.

Output power also is dependent on the gain of the transistor (amplifier). So, adding an additional high power stage can increase the power dramatically.

maldihtah13 · « **Reply #7 on:** May 29, 2008, 04:39:47 PM »

may ginawa ako dati ung katulad ng sa alexan fm stereo transmitter mahina lang output nun pero pinapasok ko sa rf amplifier un naging 5 watts.

tikbalang · « **Reply #8 on:** May 31, 2008, 08:04:32 PM »

Quote from: nomad13 on May 29, 2008, 04:39:47 PM

may ginawa ako dati ung katulad ng sa alexan fm stereo transmitter mahina lang output nun pero pinapasok ko sa rf amplifier un naging 5 watts.

kumusta yung performance nung ba1404?

maldihtah13 · « **Reply #9 on:** June 03, 2008, 01:14:25 PM »

Quote from: tikbalang on May 31, 2008, 08:04:32 PM

kumusta yung performance nung ba1404?

ok nman pero mahirap lang magtune.

may idea ako for a FM transmitter. Bili ka ng fm modulator/transmitter sa cdrking then pwede mo paghiwalayin ung transmitter at usb decoder. gwa ka controller ng transmitter pra maiset ung transmiting frequency.

Philippine Electronics Forum · « **Reply #9 on:** June 03, 2008, 01:14:25 PM »

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