Heathkit AA-81 schematic - diyAudio
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Old 22nd January 2007, 12:07 AM   #1
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Default Heathkit AA-81 schematic

Does anyone have a schematic for a heathkit model AA-81 amplifier? It uses two EL34s with a 6AN8 driver and 5AR4 rectifier. Thank you.
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Old 22nd January 2007, 02:12 PM   #2
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Sure sounds like Dyna Mark II - probably just different component values...
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Old 8th August 2012, 09:54 PM   #3
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Can anyone tell me if the bottom plate of an AA-81 has ventilation holes? My bottom cover looks factory, but has no ventilation. This seems wrong...
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