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Thanks, but I do not always have patience. A few people here like Willen I have chatted with for many years.I have read this whole thread, and audioguru, your patience with everyone in it amazes me.
I have read this whole thread, and audioguru, your patience with everyone in it amazes me.
I don't know why FM station frequencies are not managed properly in your country.
Here, car radios and home stereos have digital tuning. Since our FM frequencies are only odd (89.9MHz, 90.1MHz, 90.3MHz, 90.5MHz etc) then the digital tuning only tunes to an odd frequency so the 90.0MHz crystal transmitter will not work. Fm transmitters whose frequency drifts also will not work.
The Oriental S8050 transistor does not have a detailed datasheet like a 2N3904 American transistor. Some might work and others might not work in an FM transmitter.Hi Ag, i still use my s8050 almost one year now it runs off a mobile phone battery,i don't know it's technical speculations but it works great and clear moreover it's frequency doesn't change automatically unlike the Pn22,bc54v,2n3904 etc
Hi Ag, i still use my s8050 almost one year now it runs off a mobile phone battery,i don't know it's technical speculations but it works great and clear moreover it's frequency doesn't change automatically unlike the Pn22,bc54v,2n3904 etc
Hi ziddik, which is the circuit you made successfully and working too?
It doesn't have pre-emphasis so the de-emphasis in all FM radios will make it sound awful (no high audio frequencies), especially in North America.Hi will here is the link to my circuit
Won't it work if I add 470R and 100nF as a Pre-emphasis in the place of 1st 330nF (Mic to base on MOD4)?
You have more pre-emphasis means you have less hiss noise (on basic circuit)?
No it will not work.Won't it work if I add 470R and 100nF as a Pre-emphasis in the place of 1st 330nF (Mic to base on MOD4)?
When FM broadcasting began a long time ago the transmitters were not very powerful and the FM radios had poor sensitivity so there was a lot of hiss. The higher amount of pre and de-emphasis reduced the hiss. Now modern transmitters are very powerful and modern FM radios are very sensitive so less pre and de-emphasis works fine but it was not changed in North America.You have more pre-emphasis means you have less hiss noise (on basic circuit)?