There was a time when only the richest ham radio operators could have a radio with a panadapter. Back in the day, this was basically a spectrum analyzer that monitored …read more (https://hackaday.com/2026/02/25/adding-a-panadapter-to-a-classic-receiver/)

The MOST Effective Thermal Mass Works Like a Sunburn
https://hackaday.com/2026/02/25/the-most-effective-thermal-mass-works-like-a-sunburn/

Way, way back in the days when men wore beards and wide-lapelled suits in exotic colors, only NASA had access to photovoltaics and ‘solar’ meant solar thermal. In those days …read more (https://hackaday.com/2026/02/25/the-most-effective-thermal-mass-works-like-a-sunburn/)