| All returns accepted | ReturnsNotAccepted |
|---|---|
| Brand | Ameritron |
| Type | Linear Amplifier |
| Model | AL811H four tube only |
Check the listing for details. Ameritron AL811 External Fan and Bias Correction requires tools and some skill. Condition: New. Listed at 52.00 USD. Almost all Ameritron 811 and AL811H amplifiers have far too little airflow even for normal SSB operation. The Cooltron fan, appearing since at least 2009, is a terrible air mover. It flows roughly 20-30% of the necessary airflow on 60Hz mains. In countries with 50Hz mains, the Cooltron fan only flows
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