The PE4312 is a 50Ω, 6-bit RF digital step attenuator available for around 2 USD. Pretty neat for implementing real digital AGC! For half-the-price we can get the alternate Archiwave ARW637 or ARW621A ICs which work very similarly to PE4312! References: https://www.lcsc.com/product-detail/C49842521.html https://www.lcsc.com/product-detail/C49842520.html
This short article describes a flight-safe power supply for FieldOps. Simply get these: https://punoscho.in/product/usb-qc-pd-afc-trigger-decoy-board-module-9v/ https://punoscho.in/product/usb-qc-pd-afc-trigger-decoy-board-module-12v/ https://punoscho.in/product/usb-qc-pd-afc-trigger-decoy-board-module-15v/ https://www.mi.com/in/product/xiaomi-pocket-power-bank-pro-10000-mah-33w/ (Xiaomi Pocket Power Bank Pro 10000 33W) OR A 65W USB PD power bank - not needed for 5 to 10W QRP FieldOps https://robu.in/product/adapter-connector-cable-dc-plug-5-5x2-1mm-male-to-5-5x2-1mm-male-adapter-connector-cable-1m/ https://robu.in/product/black-dc5-5-mm-male-to-female-plug-extension-with-on-off-switch/ USB-C to USB-C cable (Zebronics 3A cable for 99 INR) Total cost: < 2500 INR