Picked up a HB-1B from eBay a while ago.
Internal battery. 4 band with extended receive.
The missing piece was a small paddle. Already had a paddle but heavy and easily damaged in the pack.
Decided on a Palm Pico for size and weight.
The paddle is wired backwards. The dat on right and dit on left. Not a issue for FT817 as can reverse the config in radio. HB-1B not that developed. Didn’t want to cut the lead so just installed backwards. Works a treat.
More to come after field testing………….