Difference between revisions of "HW-9 VFO"
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* Replace HW-9 internal VFO with a digital VFO | * Replace HW-9 internal VFO with a digital VFO | ||
| − | ** HW-9 VFO has issues | + | ** HW-9 VFO has legendary issues |
| − | *** Mechanical issues | + | *** Mechanical issues with vernier |
*** Drift due to thermal | *** Drift due to thermal | ||
*** Lack of resolution | *** Lack of resolution | ||
Revision as of 15:46, 13 September 2020
This is a work in process - Gathering pieces.
Features
- Replace HW-9 internal VFO with a digital VFO
- HW-9 VFO has legendary issues
- Mechanical issues with vernier
- Drift due to thermal
- Lack of resolution
- HW-9 VFO has legendary issues
- Fits within HW-9 VFO Box
- Controls frequency with rotary encoder
- 10 Hz steps
- DD1306 OLED Display
- I2C Interface
- "Curved" display
- Uses RIT control on HW-9
- +/- 1 KHz RIT
- Blue Pill Microprocessor
- Arduino compatible
- 3.3V
- Understands band switch sor MHz displayed
- Si5351 Oscillator
- I2C Interface
- 3 Outputs
- Transmit frequency
- Receiver frequency include offset plus RIT
- BFO frequency
- Band pass filters to turn square waves to sine waves
