npub178rvtslm3qykq8uy5afswta2qz5pk9atjxsepht4x8ldddssp6kq4sqekt (npub178r…qekt)
Always expand acronyms upon first use, in exemplica "HF CDAA."
HF is obviously high frequency (for most) but the CDAA bit is, well, ambiguous at the very least.
enquiring minds want to know.