Heathkit AA-81 schematic

astouffer · 22nd January 2007, 12:07 AM

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.

Tom Bavis · 22nd January 2007, 02:12 PM

Sure sounds like Dyna Mark II - probably just different component values...

ewhitaker · 8th August 2012, 09:54 PM

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...

22nd January 2007, 12:07 AM	#1
astouffer diyAudio Member Join Date: Jun 2004 Location: Pittsburgh, crumbling wasteland	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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22nd January 2007, 02:12 PM	#2
Tom Bavis diyAudio Member Join Date: Jun 2002 Location: Macedon NY	Sure sounds like Dyna Mark II - probably just different component values...

8th August 2012, 09:54 PM	#3
ewhitaker diyAudio Member Join Date: Nov 2008	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...