how long does the wire antenna need to be for picking up short

1K Plus™ Multiband End Fed Half Wave Antenna, NOTE: This antenna can’t cover the whole 80/75M band with low SWR, for lower SWR on the upper-end

EFHW-8010

Homebrew ATU for 160m with a way too short antenna!

DX Engineering Receive Short Element Active Vertical Antennas DXE-RSEAV-1

AUC11K - Accessories Unlimited Short Hood Mount Kit for CB Antenna

Why does an antenna require a counterpoise? - PA9X

DX Engineering Receive Short Element Active Vertical Antennas DXE-RSEAV-4

The Shortwave Antenna - How It Works - Which Ones Work Best

EndFed Random Wire '' EFRW'' Antenna – F5NPV – V85NPV

Long Wire Radio Antenna

EndFed Random Wire '' EFRW'' Antenna – F5NPV – V85NPV

Excellent features: *** Covers 80-40-20-17-15-12-10-6 meter ham bands *** Low SWR on most bands or use antenna tuner *** 1.5KW PEP (SSB-ICAS) ***

Off Center Fed Dipole Antenna, 80-6 Meters, 1.5KW/5KW PEP rated - FREE shipping in USA

Instructions for Putting up a Long-Wire Antenna - IW5EDI Simone - Ham-Radio

Ham Radio Site - Short 160m Antenna