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Flexible Interface Accepts and outputs one-of-eight control signals
they all have to be replaced
6 position antenna switch
AMERITRON mounts the 572B tubes vertically
Air-Cooled: Quiet pressurized ventilation keeps tubes safely cooled
AL-811HX, HFAMP, 800W, (4)811ATUBES, EXPORT240VAC Cooling Fan Flexible Interface Accepts and outputsOnly the AMERITRON AL 811H gives you four fully neutralized 811A transmitting tubes. You get absolute stability and superb performance on higher bands that cant be matched by un neutralized tubes. AMERITRON mounts the 811A tubes vertically, not horizontally, to prevent hot tube elements from sagging and shorting out. Others, using potentially damaging horizontal mounting, require hard to find 811A tubes to retard harmful sagging and shorting. Powerful