AL-811HDXCE HFAMP, 800W, (4)572B, EXPORT/CE, 220VAC UHF Frequencies from 1

Frequencies from 1

Power goes into the antenna instead of into heat

AL-811HD gives you the AL-811H with four 572B tubes installed

Get an extra DC power harness for your ALS-500M amplifier

AL-811HDXCE HFAMP, 800W, (4)572B, EXPORT/CE, 220VAC UHF Frequencies from 1Get the AL 811HD with 572B tubes AL 811HD gives you the AL 811H with four 572B tubes installed. Get a higher power tank circuit and grid overload protection. Grid Overload Protection protects the tubes from excessive grid current due to mistuning and it protects against excessive drive power. Four 572B tubes give you more plate dissipation than a single 3 500Z tube. AL 811HD gives you 800 Watts output in SSB and 600 Watts for continuous duty in CW,