Fourpuffs-wrong again. The HF ant from 1982 onwards when ordered from BAE, was installed on a reel between the aft loo and the rear galley and was usally controlled by the senior cabin crew member when so instructed by the flt deck.
When fully unravelled it could reach a length of 500m!. You can imagine the embrassment this caused if it was still deployed on landing. Many an unhappy time I've spent trying to get it untangeled from the tail on a dark winters night.
I hope this answers the original question.