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![Minimum voltage applied to a super-bright LED [2048x1400 - 375KB]](https://poal.co/static/images/44da2928b8b163a3.jpg){kind=link}
![Unfortunately, the old radio isn't going to sing again for a while. [4032x3024 - 981KB]](https://poal.co/static/images/272f1d1117151753.jpg){kind=link}
![The next thing on my bench. [4032x3024 - 1.54MB]](https://poal.co/static/images/8faedb372765775c.jpg){kind=link}
![A vintage TRF Coil from CARCO of Cleveland, OH [2000x2667 - 484KB]](https://poal.co/static/images/ccc9a6232322366d.jpg){kind=link}
![I've got an old power supply on the bench. [3024x4032 - 1.03MB]](https://poal.co/static/images/81c141c1c031b1f0.jpg){kind=link}
![Got a 1970s power supply on the bench. [3024x4032 - 811KB]](https://poal.co/static/images/c6a1869726261606.jpg){kind=link}