Hi. Plz cn sum1 tell me that if the inductor told in circuit of transmitter told in aran's site i.e 28AWG Enamel coated magnet wire is not available. Can i use any simple wire as inductor. Also cn i get the working theory ¤t and voltage dessipation of each component of device. Waiting 4 quick rply. N thanks in advance. U cn also mail me at badarsuhail@gmail.com.
Thanks for your rply but i wanted to ask that can i use any coil or only specified in the diagram. Circuit tells me to use a 28AWG enameld magnet wire. But it is nt available in my area. Cn i used any othr coil.
sorry to say but this not the answer to my question. i am not the only one in the world to use short mobile language. For your convenience i will repeat my question.which i have been trying from the start to know but have not got a satisfactory answer. what i get is just information about my grammar or spellings mistakes. that is not cool. but no hard feeling from my side. THE QUESTION IS: i asked that can i use any coil or only specified in the diagram. Circuit tells me to use a 28 AWG enameled coated magnet wire. But it is not available in my area. Can i used any other coil? waiting for a reasonable reply to my question.this time.
If you change the wire diameter it will alter the diameter and (if close spaced) also its length. This will result in a change of inductance that will change the frequency.
Enter the coil sizes specified in the article and calculate the inductance. Now choose the wire size you want to use and alter the number of turns, diameter, or length until you get the same inductance.
Thanks. But using a simple coil instead of 28 AWG enameled wire will make any difference to the working of circuit? I am very grateful for your concern.
I don't know of a coil that is more simple than the coil in this project. If you purchase an inductor then it might work only at a lower frequency than the FM radio band.
My FM transmitter uses 1mm enamelled wire that I "borrowed" from the crossover coil in a speaker enclosure. It has 8 or 9 closely spaced turns around a 3mm former. It is spaced away from other parts and away from the circuit board. It is tuned with a 5pF to 35pF trimmer capacitor.
It is tuned by voltage so it needs a regulated power supply to keep its frequency stable. It doesn't have pre-emphasis like FM radio stations so treble frequencies will not be received.
Hi, I have just gotten into electronics recently and I LOVE it. I wish to build the FM Radio Transmitter but cannot find the 3-18pf adjustable capacitor. Is there any substitution for this part?
Hi, I have just gotten into electronics recently and I LOVE it. I wish to build the FM Radio Transmitter but cannot find the 3-18pf adjustable capacitor. Is there any substitution for this part?
Electonics parts distributors like Digikey in Canada and the US have hundreds of trimmer capacitors. It does not need to be exactly 3-18pF but could be 5-30pF or anything that can be adjusted from 0pF to about 50pF.
Hi, I have just gotten into electronics recently and I LOVE it. I wish to build the FM Radio Transmitter but cannot find the 3-18pf adjustable capacitor. Is there any substitution for this part?
Electonics parts distributors like Digikey in Canada and the US have hundreds of trimmer capacitors. It does not need to be exactly 3-18pF but could be 5-30pF or anything that can be adjusted from 0pF to about 50pF.
I am not from Canada or the US but thanks for the advice. I have found an adjustable cap that does 4.2-20pf
20pF might limit the lowest frequency to 94MHz. To go lower then simply squeeze the coil tight. 4.2pf might limit the highest frequency to 104MHz. To go higher then simply spread apart the coil.
Fm transmitter
Posted - Sep 15 2009 : 4:09:32 PM
