New answers tagged receiver
4
votes
Discrete-Component Mixer design
A good resource on Gilbert cell mixer online is here:
https://www.qsl.net/va3iul/RF%20Mixers/RF_Mixers.pdf
I would use a single-balanced version, as it simplifies the circuit and implementation. Using ...
- 1,154
5
votes
Discrete-Component Mixer design
If its possible to build a Gilbert-Cell Mixer using discrete components
Guess what Gilbert did! Yes, that's possible :)
and get it working on either a breadboard or a PCB
yes. Note that at ...
- 17.3k
1
vote
Do highly sensitive radio receivers experience less fading
No. No one builds an AM radio with 0.0224uV sensitivity (about -149dBm on 50 ohm), but at that level of sensitivity, any extra gain is useless for any purpose (and practically speaking harmful because ...
- 1,154
0
votes
Can an audio amplifier be used to transmit or receive radio signals?
SAQ Grimeton in was built 1922-1924 in Sweden and operates on 17.2 kHz. It still operates occasionally and has been heard all over Europe, and in Canada, USA, Brazil and Alaska. So yes, radio ...
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1
vote
Can an audio amplifier be used to transmit or receive radio signals?
You can transmit audio this way, but this is not strictly transmitting a radio signal. It works with transformer coupling, as you say; there's no need for the Ground and Antenna symbols on your ...
- 12.2k
0
votes
Accepted
Can an audio amplifier be used to transmit or receive radio signals?
Short answer: not without a carrier wave:
Transmitting an audio-modulated radio frequency is fairly easy
Receiving that signal to the exclusion of other signals, and driving a speaker with recovered ...
- 1,219
1
vote
Can an audio amplifier be used to transmit or receive radio signals?
A short answer is not really.
An audio amplifier can respond to frequencies from 20 Hz to 20 kHz and when connected with a speaker, the coil in the speaker resonates as per the output frequency and ...
- 1,154
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