GreenEarth USB Rechargeable AA Batteries | 1450 mAh | Quick Charge USB Charger | 500 Cycles Reusable | NiMH Double A 1.2v (2 Pack) About this item: ✅ USB RECHARGEABLE BATTERIES – Whether you’re camping or at home, you can simply charge them with a single USB port. No need to buy batteries frequently.…
DetailsSimple SDR Receiver that can receive frequencies up to approximately 30MHz, if an optional Si5351 clock generator is used. Without this, it receives up to about 20MHz, using the ESP32 clock dividers. The circuit is so simple that it can even be built on a breadboard. Tayloe Quadrature Detector circuit on a solderless breadboard Circuit…
DetailsAntuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with…
DetailsThis item is a set of 10 band pass filters (BPF), one for each of the HF bands 160, 80, 60, 40, 30, 20, 17, 15, 12 and 10m. The filters are designed for receiver input filtering and use the popular double-tuned-circuit which is reliable and easy to build, without needing access to any special equipment. The kits…
DetailsAntenna Rotator with Arduino. More info on www.ea7hg.com or ea7hg@hotmail.com https://www.youtube.com/watch?v=N6pSJuTp1pE https://www.youtube.com/watch?v=rb6bFKrHNz4
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