Ameritron AL-811H HF Amplifier Information
Find resources for the Ameritron AL-811H, including manuals, tuning guides, modifications, and user reviews for this popular HF amplifier.
The Ameritron AL-811H is a popular HF amplifier, often chosen by operators for its balance of power and cost. This amplifier uses a bank of 811A vacuum tubes in a grounded grid configuration, providing a significant boost to a transceiver's output for working DX or punching through pileups on crowded bands. Many hams find the AL-811H a reliable choice for daily QSOs and contesting, especially on the lower HF frequencies.
This category provides resources for AL-811H owners, including the official Ameritron AL-811H manual and various operational guides. Operators can find tuning instructions to optimize power and linearity, along with common modifications like extending coverage to the 10 and 12 meter bands. There are also practical solutions for routine maintenance, such as replacing panel meter lights, and enhancements like QSK and keying interface modifications for improved operating convenience.
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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. -
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. -
Ea2id demonstration video of the Ameritron AL-811H in spanish -
Demonstrating tuning and operation of the ameritron al-811h in this Youtube video -
eHam reviews of the Ameritron AL-811H HF power amplifiers -
Ameritron Al-811H Tuning for Power/Dissipation/Linearity, and More Generally 811A Tube Amps in Grounded Grid -
Easiest possible tuning steps using a closed CW key, FM or AM tuning the Ameritron AL-811H