DL-300MN, IT, DRY DUMMY LOAD, 300W, 0-150MHz, N Features_300 W Maximum draw at rated output:

Maximum draw at rated output: 15 amps at 240 VAC

a massive inrush current flows

Control Box: 6" x 6 ⅛" x 2 ¼"

has Load Fault LED indicator

And the tubes are so inexpensive that you can replace one for mere pocket change

DL-300MN, IT, DRY DUMMY LOAD, 300W, 0-150MHz, N Features_300 W Maximum draw at rated output:The DL 300M Dummy Load simulates an accurate 50 Ohm antenna up to 150 MHz, enabling you to test your transmitter without radiating a signal on the air. Specifications: DC to 150 MHz. Handles short term RF power up to 300 Watts. VSWR of less than 1. 5: 1 at 150 MHz. 0. 5 lbs. N Connector Product Manuals Download Product Manual