[Noisebridge-discuss] Help needed to debug FM transmitter.

[Sriram Srinivasan]

Thank you Jake. 

> I have a lot of experience with FM transmitters and i can tell you that the one you have is not going to make a good signal for you.  It's called a "free running oscillator" because it does not have a PLL to steer the frequency.

Ah. I'd heard of this, but no one has said it in such strong terms. 
> 
> If you want to have a radio station that's on for more than a few minutes, and something powerful enough that it can be heard farther away than shouting, you need to get a PLL-based transmitter.  There are a zillion options on Aliexpress.com.  Many of them are total crap.


> I suggest one with a BH1415F chip, between 5-15 watts output, and don't pay more than $100 including shipping.  Some of them have problems but most will work for you without any modification.  If you see one that looks good to you, email me the link and i'll tell you what i think.
> 


I also ordered parts for the BH1417 and PLL based design here:

BH1417 Stereo PLL FM Transmitter

What do you think of this one? 

--sriram.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.noisebridge.net/pipermail/noisebridge-discuss/attachments/20130704/066bd189/attachment-0003.html>