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Old 21st March 2009, 03:23 AM   #1
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Default OPT test data?

There's a PDF document out there somewhere from a well known audio enthusiast. It documents measured performance data from a variety of well known output transformers. The author categorized their performance (A, B, C, etc.) depending how well each test subject fit profile A, etc. He also noted the -3dB point at one or both ends of the audio spectrum. The last few pages of the document had images of typical "A" transformers, "B", etc.

Does anyone recall the link to the document I referencing? I can't seem to find it now...
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Old 21st March 2009, 12:32 PM   #2
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It was John Atwood - it's at one-electron.com. If you don't have that site bookmarked for schematics, you should...
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Old 22nd March 2009, 12:17 AM   #3
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Yes, that's the one. Thank you, Tom. I've got it printed out at the office, but I don't have access to that printed copy right now.
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