An ionospheric propagation chart rendered in the style of a vintage scientific illustration — signal bounce paths, labeled layers, and PROPAGATION NERD below for the operator who watches solar flux indices with genuine excitement. For the amateur radio operator who is not just licensed but deeply, technically curious.
- Ethically grown and harvested US cotton for sustainability-
- Do not dryclean-
Do not bleach- Tumble dry: low heat- Iron, steam or dry: low heat- Machine wash: cold (max 30C or 90F), with similar colors
