Pages

Saturday, April 16, 2011

1 km. FM Transmitter

Description

This one is a high power long range (use yagi antenna)  FM Transmitter  that provides very good frequency stability in about 1km range and very good microphone sensitivity. It can be used inside guitars, as a part of remote control systems or in other similar applications.

The features said above are achieved by including an RF amplifier stage with 10dB gain and AF preamplifier stage to boost the modulation.





The circuit construction is simple. L1 is integrated into the PCB with 3.25 turns. Transistors are not critical. The BC547s can be replaced with any small signal NPN type transistor and BC557 is a general purpose PNP transistor so it can also be replaced easily.

The power consumption is low. The finished circuit draws about 30mA. A single 9V battery is ample to power the FM wireless microphone.

The PCB file is given in the download section of the project page. You should check Harry's page for more detailed information about the components, PCB modifications and the other features of the circuit.


if you need more details then post a comment below

37 comments:

  1. please the pcb for this circuit

    ReplyDelete
  2. sure this work??

    ReplyDelete
  3. 01829296878 এই নাম্বারে ভাই পারলে একটা মিস দিয়েন । আমার একটা বানানো দরকার ্

    ReplyDelete
  4. I built this circuit with a pcb design from smovpo Smile to say that after construction of this circuit with a 9v & yagi antenna its range is only 100mtr. All the circuits that are published in net is nothing but a toy transmitter. It is nothing but wastage of money.
    Sibaram Datta, Sarisha, South 24 Pgs.

    ReplyDelete
  5. I built this circuit with a pcb design from smovpo Smile to say that after construction of this circuit with a 9v & yagi antenna its range is only 100mtr. All the circuits that are published in net is nothing but a toy transmitter. It is nothing but wastage of money.
    Sibaram Datta, Sarisha, South 24 Pgs.

    ReplyDelete
  6. Right now it appears like Wordpress is the best blogging platform out there right
    now. (from what I've read) Is that what you are using on your blog?

    My blog: www.auschat.com.au

    ReplyDelete
  7. Good day! I know this is kinda off topic but I was wondering which
    blog platform are you using for this website? I'm getting sick and tired of Wordpress because I've had issues with hackers and
    I'm looking at options for another platform. I would be fantastic if you could point me in the direction of a good platform.

    My web site; lowest mortgage rates

    ReplyDelete
  8. Hello to every body, it's my first pay a quick visit of this web site; this web site contains awesome and truly good data in support of visitors.

    My homepage - members.f7social.com

    ReplyDelete
  9. Fantastic site you have here but I was curious about if you knew of any user
    discussion forums that cover the same topics talked about
    here? I'd really like to be a part of online community where I can get feed-back from other knowledgeable people that share the same interest. If you have any recommendations, please let me know. Cheers!

    my webpage ... exercises to improve vertical

    ReplyDelete
  10. With havin so much written content do you ever run into any problems of plagorism or copyright infringement?
    My site has a lot of unique content I've either written myself or outsourced but it appears a lot of it is popping it up all over the internet without my permission. Do you know any ways to help reduce content from being ripped off? I'd
    definitely appreciate it.

    Feel free to surf to my blog workouts to improve vertical

    ReplyDelete
  11. Hi there to every single one, it's actually a pleasant for me to pay a visit this website, it consists of important Information.

    Also visit my web-site exercises for vertical

    ReplyDelete
  12. Pretty! This has been an extremely wonderful article.
    Many thanks for supplying this info.

    Take a look at my web-site: http://wiki.zero1.al

    ReplyDelete
  13. Sweet blog! I found it while browsing on Yahoo News. Do you have any tips on how
    to get listed in Yahoo News? I've been trying for a while but I never seem to get there! Cheers

    Feel free to visit my web blog :: Www.Kentuckyfloydchicken.Com

    ReplyDelete
  14. Hello there! This is kind of off topic but I need some guidance from an established
    blog. Is it very difficult to set up your own blog?
    I'm not very techincal but I can figure things out pretty fast. I'm thinking about making my own but I'm not sure where to start. Do you have any ideas or suggestions? Appreciate it

    Here is my web blog ... workouts for vertical jump

    ReplyDelete
  15. I used to be suggested this blog through my cousin. I'm no longer certain whether or not this publish is written via him as nobody else realize such certain about my difficulty. You are incredible! Thanks!

    Visit my site therideremuda.com

    ReplyDelete
  16. always i used to read smaller articles which also clear their motive, and that is also happening
    with this article which I am reading at this time.



    Feel free to visit my web site; http://xn--fcebook-8va.it/

    ReplyDelete
  17. Hi there, the whole thing is going nicely here
    and ofcourse every one is sharing data, that's really excellent, keep up writing.

    Also visit my site :: workouts to increase vertical leap

    ReplyDelete
  18. Hurrah, that's what I was searching for, what a information! present here at this blog, thanks admin of this web page.

    my page - http://www.thebookshelfoperation.com/

    ReplyDelete
  19. Informative article, exactly what I needed.

    Here is my web-site :: Xasca.Science.Uu.nl

    ReplyDelete
  20. Wow, this post is fastidious, my sister is analyzing these kinds of things, so I am
    going to tell her.

    Here is my blog: Workouts to increase vertical jump

    ReplyDelete
  21. I visited multiple web sites however the audio feature for audio
    songs current at this site is truly excellent.


    my web blog; vertical leap Exercises

    ReplyDelete
  22. I have been exploring for a little bit for
    any high quality articles or blog posts on this sort of
    area . Exploring in Yahoo I eventually stumbled upon this site.
    Reading this info So i am happy to convey that I've an incredibly excellent uncanny feeling I found out exactly what I needed. I most definitely will make certain to do not overlook this site and give it a look on a relentless basis.

    Here is my web site :: atherton home manhattan futon sofa bed 6 piece living room set

    ReplyDelete
  23. It's amazing to pay a visit this site and reading the views of all mates regarding this post, while I am also zealous of getting know-how.

    Here is my page; http://friendfeed.com

    ReplyDelete
  24. Greetings! Very helpful advice in this particular article!
    It's the little changes that make the biggest changes. Thanks for sharing!

    My webpage: http://verticaljump.einfohound.com/

    ReplyDelete
  25. Since the admin of this website is working, no uncertainty very shortly it will
    be famous, due to its quality contents.

    Review my homepage - exercises to improve vertical leap

    ReplyDelete
  26. Gooԁ day! Would you mind if I ѕhаre your blog with
    my zyngа group? Thеre's a lot of folks that I think would really appreciate your content. Please let me know. Cheers

    My web page ... outdoor security camera systems

    ReplyDelete
  27. When someone writes an post he/she retains the thought of a user in his/her mind that how a
    user can know it. Therefore that's why this piece of writing is perfect. Thanks!

    Feel free to visit my blog post workouts to jump higher

    ReplyDelete
  28. Hmm is anyone else having problems with the images on this blog loading?
    I'm trying to determine if its a problem on my end or if it's the blog.
    Any feed-back would be greatly appreciated.

    my page - exercises to increase vertical leap

    ReplyDelete
  29. I'm not sure why but this weblog is loading very slow for me. Is anyone else having this issue or is it a problem on my end? I'll check back later
    and see if the problem still exists.

    Here is my page: vertical leap exercises

    ReplyDelete
  30. Greetings! Quick question that's entirely off topic. Do you know how to make your site mobile friendly? My website looks weird when browsing from my apple iphone. I'm
    trying to find a theme or plugin that might be able to
    correct this problem. If you have any suggestions, please
    share. With thanks!

    Visit my web site :: how to dunk

    ReplyDelete
  31. I'm gone to inform my little brother, that he should also pay a visit this web site on regular basis to obtain updated from most up-to-date reports.

    Also visit my homepage: Exercises to Increase vertical leap

    ReplyDelete
  32. Hello to every one, the contents present at this web page are really awesome for people knowledge, well, keep up the nice work fellows.


    Stop by my blog post :: workouts to jump higher

    ReplyDelete
  33. Spot on with this write-up, I really feel this site needs much more attention.
    I'll probably be returning to read more, thanks for the info!

    Feel free to visit my web-site :: Daycare Fullerton

    ReplyDelete
  34. Can I get a detailed analysis for this circuit

    ReplyDelete
  35. can i get ditals of thi circute plz i want to made it

    ReplyDelete