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- Frequency? (D: I would prefer 70cm/440MHz, easier to get PAs and is less problematic in regard to doppler)
- Bandwith? (HAMs usually use 2.4 MHz, commercial products use 5-8 MHz)
- Power? (run the PA+Modulator all the time or only at timeslots)
Ampli
Energy budget
| Device | Input voltage | Power usage | Usecase | Size | Weight |
|---|---|---|---|---|---|
| Raspi Zero | 5V | 240mA Source, 350mA max | Video recording (with camera) | PCB: W(65mm) x D(30mm) | |
| HV320E | 5V/12V | 1420 mA@5V | Encoding, Modulating, Transmitting | PCB: W(100mm) X D(70mm), Case: W(105 mm) x D(75 mm) x H(35 mm) | PCB: 55g, with Case:175g |
Bill of Materials
| Qty. | Device | Weight | Price |
|---|---|---|---|
| 3 | RaspberryPi 0 | 9g | $5.00 |
| 3 | PiCamera Module | 3g | $19.95 |
| 1 | HV320E Modulator | 55g (less case) | $280 |
| 1 | Amplifier | ~20g | ~50 |
| 1 | Power Distribution Board | ~40g | ??? |
| X | Heatsinks | ??? | ??? |
| X | Cables | ??? | ??? |
| 1 | Lithium Polymer Battery | ??? | ??? |
| Totals: | ~500g | $550 |
Some material:
https://kh6htv.files.wordpress.com/2017/12/an-28a-hv320rev18dec2017.pdf
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