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Apparently the one he has now after the run of them is working good so far. Process of elimination is the best tool to finding out what’s going on. Thank you so much Mac! This raises a point I was making about Darasheet traveling onto audio and control wiring.
He has had a heck of a lot of FM02’s pass through his hands for the sake of this community, with very few complaints about these units. Perhaps “radios” will become my research topic for Used transformer that put out 16v. I didn’t see a stereo encoder there.
Try Dirks battery test first, it could be getting noise from the PS. Distorted Sine output from Transformer 8.
stereo Transmitter – Electronic Projects Design/Ideas – Community
And what about renaud stereocoder I was never a fan of SMD electronics not because they are so tiny and hard to work with, but they are incredibly vulnerable to even light stresses of the PC board such as handling or minor bumps and such. Harry’s crystal FM transmitter might be good. The pf will get you in the ball park and the maximum capacitance you want in there would be a 5 nano farad. Use an iron no greater than a 15 watt or over-heating of the pin will result and possibly damage the FM chip.
If you have good range with the 8 volt supply, use it.
Congrats to those who are not experiencing these problems and hope their systems continue to work for them. I just hooked it up and I can honestly say now that something was wrong with by1415 original board. Losses in inductor of a boost converter 8. Dec 242: The suggestions could seem like engineering a full blown KW station. A good example of this is taking a portable battery operated radio and put a weak battery in it and hear how distorted and low volume the audio is compared to a fresh correct voltage battery.
BH Datasheet, BH PDF – Free Datasheets, Wireless Audio Link IC
Then we can take a look at how Vast has this BH chip configured for both the 19Khz pilot level datasheet at all and the time constant components in the audio section to see where they have the internal processor’s attack and release times set at. I am confused, does the negative lead of the Capacitor get soldered to the pad as per the text on the image or on the pad marked with a yellow dot closest to Pin 19 as per the text in the post below? Failing that, here is what I would do if it were me.
Maybe I read into it too much, but the verbiage very much seemed like you were saying that the numbers were in favor of FM02s being bad and Uke was one of the few that had one work well. For systems where wiring is already moved away but there is still hum issues or inductive interference issues onto other devices, use the Radio Shack snap-on chokes on all your wiring, both at the input and output points.
It has now, and always has had a very loud buzz. Drove all the way datahseet of the neighborhood with clear audio. It’s a switching datassheet supply and as such, is probably very, very noisy. bn1415
This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. These can be many. AF modulator in Transmitter what is the A?
I have one of those newer Vastelec sp? Sign In Sign Up. Doesn’t the RF part deserve the same datqsheet and perfection as well? I’ve tried it with a PC power supply — horribly noisy. I’ll see what I have in the parts bin that is within those ranges if I get around to playing with the pilot tone. Pc power supply out of old computer 12′ rg58 pre made with bnc fitting from radio shack Station I’m using is But at least everyone has a head start on things for next year.
As others have suggested, the PC power supply datssheet not the best thing to use.
You will have to tweak up the audio gain to be optimized, however. I want to use the transmitter on my yampp mp3 player www. In order to correct this, a proper modulation monitor or O-scope capable of Mhz or more will be needed to adjust properly. Here is the website I pulled it from. For one, keep the volumne level down.
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These previous “fixes” noted within this thread by operating the unit at a reduced voltage only drops the mean voltage feeding the chip and thus drops the chips ability to function correctly. Pre tin the cap leads so the solder will take faster and require less heat to do so. The hissing is inherent to the FM chip if that pilot tone is left to run wild, wont matter what make or kind of TX the chip is sitting in Should I run to radio shack and grab ferrit beads for everything?
Oh I’m also still getting the shhhhhhhh at the end of some words but if I turn it down anymore then it would almost be muted.
One more thing to add to the list of possible problems and their fixes. What does this mean?? I’m sorry for the inconvenience but i can’t attach it and u know the reason