Can some one recommend me a low range FM transmitter design?

[Kim Christensen]

wow this look's good!
Has it been tested? were can i find a documentation? how far will it transmit?

You can find his post here. Sounds like he built it, tested it, and it worked fine. He hasn't been active since 2019.

[Zero999]

wow this look's good!
Has it been tested? were can i find a documentation? how far will it transmit?

You can find his post here. Sounds like he built it, tested it, and it worked fine. He hasn't been active since 2019.

Yes. it's not my design. I would consider taking the signal from a tap on the inductor in this case, to reduce the output power level.

Audioguru lost his logon details and started posting from another account, but even then he's not been here since 2020.
https://www.eevblog.com/forum/profile/?u=554352

He's still quite active on electro-tech-online, but I was banned from there over 10 years ago.
https://www.electro-tech-online.com/members/audioguru.16360/

[ezalb98]

wow this look's good!
Has it been tested? were can i find a documentation? how far will it transmit?

You can find his post here. Sounds like he built it, tested it, and it worked fine. He hasn't been active since 2019.

thanks!

[mikerj]

You can't transmit into a dummy load

Who said anything about using a dummy load on the TX side?

[vk3yedotcom]

The Talking Electronics website has a pretty good section on small FM transmitters.

I've had good luck with them. Eg:



You might get 500m down the street or outside.

But if you're trying to transmit to an average radio that's indoors the range will likely be less.

[Juri 69]

There are many similar circuits on this site, and practical designs are posted. But I warn you - this is not entirely legal!!! You can assemble the circuits - work without going on air on the equivalent load! Study the circuitry and, most importantly, the design features of high-frequency microwave circuits!


https://vrtp.ru/index.php?act=categories&CODE=article&article=2369

[wasedadoc]

There are many similar circuits on this site, and practical designs are posted. But I warn you - this is not entirely legal!!! You can assemble the circuits - work without going on air on the equivalent load! Study the circuitry and, most importantly, the design features of high-frequency microwave circuits!


https://vrtp.ru/index.php?act=categories&CODE=article&article=2369

1. I surmise that you have not read and understood all previous replies.

2. I would hesitate to class 100MHz as high frequency microwave.