R.L. Drake AL-4 Loop Antenna 150-1500 kHz Plug-In for SPR-4 SW-4 Set Screw Arms (Less Spreaders)

R.L. Drake AL-4 Loop Antenna 150-1500 kHz Plug-In for SPR-4 SW-4 Set Screw Arms 16 Inch Wide 43 Inch Tall (Less Spreaders)

  To make this unit complete you will need some standard 1/4 diameter tubing, and cut it to length.

 The last picture is of a complete unit.

• Compatible Radios: Explicitly engineered for the RL Drake SPR-4 solid-state programmable receiver and the Drake SW-4 / SW-4A shortwave receivers. [1, 2, 3, 4]
• Frequency Coverage: 150 kHz to 1500 kHz (LF and AM Broadcast bands only). [1, 2]
• Assembled Dimensions: 16 inches wide by 43 inches tall. [1, 2]
• Spreader Arm Specs: Aluminum tubing measuring 0.25 inches (1/4") in diameter. The top/bottom vertical spreader segments measure approximately 21.5 inches, while the horizontal cross-spreader segments span 8 inches on each side from the center hub to form the correct 16" width footprint. [1, 2]
• Design Variant: This is the early factory production variant that uses Allen/set screws to clamp down on the smooth aluminum spreader rods instead of the later thread-locking tube variant. [1, 2]

Original R.L. Drake AL-4 directional shielded loop antenna for medium-wave reception from 150 to 1500 kHz. Plugs into the top-panel ¼-inch jack of the Drake SPR-4 and SW-4/SW-4A receivers for 360-degree rotatable nulling of interference. Features central aluminum hub with four aluminum tube arms secured by Allen set screws. Assembled size approximately 16 inches wide by 43 inches tall. Includes plastic handle with ¼-inch phone plug and connecting cable. Excellent accessory for classic Drake shortwave receivers seeking improved broadcast-band performance.