- Oled IO:
- Mainboard
- 8 Bands RF
⚓ Symptoms
TX on 4 bands cooks the final PA (IRLML2060), the 4 others bands are OK.
Power usage, default settings, on CW, keying, power supply was limited to 700mA:
| band | power usage |
|---|---|
| 80 | 483mA |
| 60 | 516mA |
| 40 | 601mA |
| 30 | 517mA |
| 20 | 700mA |
| 17 | 700mA |
| 15 | 700mA |
| 10 | 700mA |
Unlimiting the PSU, or setting a limit of ~800mA will ends up with the PA cooked.
The 40m band was worked on WSPR and JS8 for a few hours on unregulated 3S 18650 without issues.
⚓ Tests
Some ideas to tests: https://twitter.com/DaSharkbiscuit/status/1481926263732330497
⚓ Around 14 Jan
I did another test in Tx in CW (table upper), and the PA doesn’t seems to cook itself immediately, from what I remember, when keying, the power usage stayed around 400/500mA for one to two seconds then switched to +700mA and the PA cooked if offered more.