telescoping

W3FF Portable Dipole  ^pop - This is the antenna w3ff designed for his walking portable station. It is a dipole constructed out of the plastic plumbing pipe CPVC. There are telescoping whips at the ends of each side of the dipole, and these whips are adjusted to bring the antenna into resonance on each of five HF Bands 10, 12, 15, 17, and 20 Meters

Homebrew Travel Antenna - This is a low cost homebrew two band travel antenna for 20 and 40 meters. It is based on the B&W Travel Antenna concept with a telescoping whip and a loading coil

Stealth Multiband Vertical  ^pop - A vertical antenna for 40 and 80 meters band, using a telescoping fiberglass fishing pole.

Tri-Mode Buffer Amplifier Box - The TMB-1 is an RF amplifier unit / receiving accessory that can be used with a low-impedance broadband loop, a high-impedance terminated loop (such as a Pennant, Flag, or Kaz Delta), and whip (telescoping rod) antennas.

Easy 160m for telescoping crank up tower - 160m Is it a sloper? or tower drive?

Glen Martin Engineering, Inc.  ^pop - Glen Martin manufactures aluminum and steel amateur antenna self-supporting and telescoping towers, mounts, masts, thrust bearings and accessories.

Luksa Industries - Luksa industries design and manufacture mechanically operated aluminum telescoping masts and telescoping tripods to support communications and military antennas

Delhi Towers - Amateur radio towers by Wade Antenna ltd. Wallmounts,masts and accessories, tripods, dmx self spporting towers, telescoping masts

Nott Ltd. - All band 10 thru 80 meters antennas. Park 'n Talk telescoping whip antenna mounts, folded unipole antennas