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10 meter modification for the Ameritron AL-811 and AL-811H amplifier. This mod apply to other Ameritron AL Series RF amplifiers and allow extension to 10 and 12 meters band.

Pictures of the Ameritron AL-811 modification for 10 meter band extension by km5ps

Are you experiencing very high SWR with the 10M Modification to Ameritron AL-811 amplifier ? This is a good forum topic to fix this problem.

Discussion on how properly drive and tune athe Ameritron AL-811 power amplifier

Ameritron Al-811H Tuning for Power/Dissipation/Linearity, and More Generally 811A Tube Amps in Grounded Grid

A solutiom for the Ameritron AL-811(H) RF power amplifier, burnt panel meter lights. A common failure with the Ameritron AL-811 and similar amplifiers is that the panel meter lights burn out prematurely. These bulbs are usually integrated into the actual panel meter. The solution for this is to provide the meter backlighting with LEDs.

This article examines the performance of the Ameritron AL-811H amplifier with the supplied 811A tubes and with 572B tubes, and details a procedure for replacement of existing tubes.

Demonstrating tuning and operation of the ameritron al-811h in this Youtube video

Ea2id demonstration video of the Ameritron AL-811H in spanish

eHam reviews for the Ameritron AL-811 linear amplifier

eHam reviews of the Ameritron AL-811H HF power amplifiers

Easiest possible tuning steps using a closed CW key, FM or AM tuning the Ameritron AL-811H