https://github.com/marek128b/ham-radio-transceiver-da

this is a homebrew 20m qrp transceiver.
https://github.com/marek128b/ham-radio-transceiver-da

amateur-radio cw esp32s3 radio ssb

Last synced: 3 months ago
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this is a homebrew 20m qrp transceiver.

• Host: GitHub
• URL: https://github.com/marek128b/ham-radio-transceiver-da
• Owner: Marek128b
• Created: 2024-05-03T16:09:31.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2024-10-09T08:24:37.000Z (3 months ago)
• Last Synced: 2024-10-10T14:01:15.812Z (3 months ago)
• Topics: amateur-radio, cw, esp32s3, radio, ssb
• Language: C
• Homepage:
• Size: 51.2 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 18
• Metadata Files:
  • Readme: README.md

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README

        
# HAM-Radio-transceiver-DA

**table of content**

- [HAM-Radio-transceiver-DA](#ham-radio-transceiver-da)

  - [Hardware](#hardware)

    - [Transceiver basic setup](#transceiver-basic-setup)

      - [Receiver basic setup](#receiver-basic-setup)

      - [Transmitter basic setup](#transmitter-basic-setup)

---

## Hardware

test MSG

### Transceiver basic setup

Source: [land-boards.com](https://land-boards.com/blwiki/index.php?title=File:FARHADPNG.PNG)

 


#### Receiver basic setup

The receiving part of the radio works as follows.

1. The signals get picked up by the antenna 

2. The picked up signals get filtered to select the right band we want to receive. 

3. As the signals are at -80 to -110dB at this point we need to amplify the signal using a Termination Insensitive Amplifier.

4. To hear the right station we need to mix the signal with a variable frequency oscillator to bring the station you want to hear in the passband of the IF-Filter.

5. Amplify the signal 

6. The signal goes through the SSB-Filter designed for 16MHz and 2.7kHz of bandwidth. 

7. Amplify the signal 

8. Demodulate the signal using a ring mixer. 

9. Amplify the signal for the headphones. 

#### Transmitter basic setup