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Vintage tube amp Heathkit AA-71

post #1 of 7
9/13/10 at 9:29am
Thread Starter 

Hey, I am hoping someone can help me find a schematic for this amp. also maybe a instruction manual. I got this thing at a garage sale a while ago it works pretty good but it doesn't have the volume I think it should there is a plug (un filled) on the front that is marked PRE_AMP POWER and i don't know what it is for it looks like a tube jack but I don't know what to put in there.

thanks any sugestions or links to schematic would be grand.

God Bless,

Bill

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post #2 of 7
9/13/10 at 10:58am

Hunt on Google or E-bay......Is this a tube amp??? does it have a volume control???

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post #3 of 7
9/13/10 at 11:03am

The AA-71 is a mono tube power amp that was designed to get it's AC power from the partnering pre-amp.  Honestly, without that, I am not sure how you got it to power up at all, unless someone had modified it.  Here is a nice picture of one that has been modded to take a standard IEC power cord, and otherwise dolled up.  Looks like it could be a nice amp, but you really need two of them...

 

http://www.audiocircle.com/index.php?action=gallery;sa=album;id=3108#

 

BTW the Heath company still exists, in Benton Harbor Michigan - you might call them and ask...


Edited by Skylab - 9/13/10 at 11:04am
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post #4 of 7
9/13/10 at 11:22am

Heathkit will send you a copy of the original manual for around $25. I got one for a preamp.

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post #5 of 7
9/13/10 at 11:46am

Data Professionals owns the IP to the old Heathkit stuff now.  They're selling the manuals and, according to the website, have a variety of parts you can purchase, too.

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post #6 of 7
9/13/10 at 11:50am

Very  nice, Uncle Erik!  Never knew that.  The AA-71 manual can be ordered on-line there for $5.

 

That is a nice looking amp, the AA-71.  One 6SN7GT and one 6L6/5881 per side.  Very cool.  A buddy of mine uses Heath W5M tube monos with his Quad ESL-63's.  Sublime sound, baby.

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post #7 of 7
9/13/10 at 12:00pm

Thanks!  Though not on point, another great resource for vintage gear is Sam's Technical Publishing.  Sam's Photofacts cover almost all of the old commercial and industrial tube gear.  You get the schematics, parts lists, substitute parts, photos with labeled parts, just everything.  You can easily clone old gear from Photofacts, too.

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