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 Post subject: 1.5V AM Transmitter with 100% modulation
PostPosted: Sep Tue 21, 2021 5:55 pm 
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Joined: Mar Thu 01, 2018 1:30 am
Posts: 777
Frequency is 1MHz or 1000KHz.

2n3904 can be used instead. Q2 to Q4 is a discrete Gilbert mixer. The antenna is a 90uH loop cool.

100% modulation obtained. A 1.5V Duracell can be used to power this little TX.


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 Post subject: Re: 1.5V AM Transmitter with 100% modulation
PostPosted: Sep Tue 21, 2021 6:59 pm 
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Joined: Jan Sat 25, 2020 5:23 am
Posts: 793
Location: Colorado Springs, CO 80917
Some more details are published here but you'll need to turn on translation in your browser.

https://ji1nzl-official.blogspot.com/2015/09/cqam.html


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 Post subject: Re: 1.5V AM Transmitter with 100% modulation
PostPosted: Sep Tue 21, 2021 8:35 pm 
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Joined: Mar Thu 01, 2018 1:30 am
Posts: 777
Yes, it's not my design. But didn't bother to give more info. The other ones are my own. That colpitts osc with inductor in emitter


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 Post subject: Re: 1.5V AM Transmitter with 100% modulation
PostPosted: Oct Wed 06, 2021 3:33 pm 
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Joined: Apr Sat 11, 2015 5:30 pm
Posts: 1411
Location: West Point, PA 19486
Dare4444 wrote:
A 1.5V Duracell can be used to power this little TX.


Only if you don't care if your work is ruined by the leaking Duracell.


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