[Got a couple questions regarding this fm transmitter]

Ah frig so much for the easy solution to my problem. I'm not really an expert in designing, You wouldn't by chance have a circuit that I could use?

[Got a couple questions regarding this fm transmitter]

wow thanks for the super fast response. I am not very good at designing circuits myself.  200ft would probably not be good enough as I would like to use this transmitter in my truck and have it transmit the fm signal over my property especially in the garage and in my house. Also would like to be able to hear the signal when I mow the lawn etc..

Do you have any idea what would be involved to modify the existing circuit? Do I just remove the existing components connected on pin11 on the bh1417 chip and connect this pin to a seried 10pf ceramic capacitor and run this to the input on the attached amplifier? I got that attached amplifier circuit here http://electronics-diy.com/BH1417_PLL_Stereo_FM_Transmitter.php Theres a FAQ section near the bottom of this page with a link to this amplifier. On the amplifier page it says that the input should be at least 100mW to achieve 1W output. I would assume that the bh1417 would push 20mW max. This should give me about 200mW right? I dont want to alluminate the whole country side. LoL Maybe I could put a variable attenuator on the output of this amplifier? What are your thoughts?

ps I would be using Q1 Transistor: 2N5109, MRF227, 2N4427, 2N3866 in the amplifier circuit below.


One other side question, what are your thoughts on the bandpass filter on the output? This bandpass filter is made by Soshin Electronics Co. labelled GFWB3. It is a small 3-terminal printed bandpass filter and operates in the 76-108MHz frequency band. It has very steep cutoffs and was wondering if I should bother changing this exiting LC circuit with this? Is it worth it or not in your oipinon?

[fm transmitter scematic required]

oh I just saw this post. I too would be interested in finding an amplifier for it so I can get at least 500ft range. I live in a rural area and I would like to boradcast my satelitte radio from my house to the garage.

[Got a couple questions regarding this fm transmitter]

Hello everyone , I just joined here from NB Canada. I just purchased the Micromitter stereo FM transmitter kit based on the following circuit. see url below.
http://electronics-diy.com/schematics/BH1417_fm_transmitter.htm

I had a couple questions if you may,

First, has anyone tried removing the attenuator and if so what range can I reasonbly expect to gain with it removed?

Secondly on another page on diy that comments the BH1417 chip,  I read a comment saying the following,

BH1417 chip may also be used a stand alone stereo encoder. The advantage of that is that you have full freedom of using a transmitter & amplifier of your choice. You will still have a pre-emphasis, limiter, stereo encoder and low pass filter in one small package because very few external components are required for these blocks. PIN 5 is MPX output that can be directly connected to an external FM transmitter through a 10uF cap.

Has anyone tried amplifying this circuit or does anyone know of an amplifying circuit that would work with this kit? I would like to achieve about 500ft of range with this unit. I would appreciate any suggestions.

Many thanks for reading my post.