Heathkit Schematic model AA-50 needed - diyAudio
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Old 8th June 2007, 08:54 PM   #1
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Exclamation Heathkit Schematic model AA-50 needed

I took this amp apart and carefully made a schematic as I went, and now i've lost the schematic. I cannot find this anywhere on the web. I tried to connect it from memory to no avail.

Specifically I need the schematic for the PSU; it has a 5AR4 rectifier along with 5 caps(60, 25, 40, 40, 20 [500V]). There is a 10w 1.5 kOhm wirewound resistor connected to pin 8 of the rectifier- I had connected this to the (+)terminal of the 60uF cap along with the centre-tap lines from the OPTs- assuming this was my positve volatge- am I incorrect?
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Old 8th June 2007, 11:08 PM   #2
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Try pinging Tom Bavis. IIRC, he has the AA-50 schematic.
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Old 9th June 2007, 12:30 AM   #3
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You rang?

I'm afraid I don't have that one... but it's one of the few Heathkits that was covered in Sams Photofacts... folder 544-7 to be exact. Check with your local library...
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Old 9th June 2007, 12:35 AM   #4
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Thanks for the help, guys
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Old 9th June 2007, 01:05 AM   #5
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Their website appears to be down... I'm assuming that the 'check my local library' comment was facetious? Or might the Fresno, California Public Library have information I can use?
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Old 9th June 2007, 01:51 AM   #6
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No he is not being facetious!!! Library used to have (and still may)
have tons of Sams. I have gotten 2 from my library in the bay area in the last 1 1/2 years. Victoria
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