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Old 9th July 2012, 01:18 AM   #1
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Default Any body can help to identify this pair of OPTs.

I've got a pair of ADC pre-amp opts by chance. Model No. TF1A13EB, frequency response 250-20KC, and impedence ratio 100K : 600Ohms. I can't find the detailed specifications for these transformers. Anybody can give me a hint? Many thanks.
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Old 9th July 2012, 08:23 AM   #2
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Looks like they came out of some army equipment.
Product / Part Number: A8046 - TRANSFORMER,AUDIO F by ADC TELECOMMUNICATIONS INC. - 00144 - ArmyProperty.com
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Old 9th July 2012, 08:34 AM   #3
AJT is offline AJT  Philippines
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Quote:
Originally Posted by Kenneth Zhu View Post
I've got a pair of ADC pre-amp opts by chance. Model No. TF1A13EB, frequency response 250-20KC, and impedence ratio 100K : 600Ohms. I can't find the detailed specifications for these transformers. Anybody can give me a hint? Many thanks.
everything's been given, what more do you need? you can measure dc resistance of windings if that will be of use to you...not a hifi traffo it seems...but at low levels who knows? use it in a circuit to find out...maybe as a headphone opt.....a headphone of 32ohms reflects about 5k in the primary....
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Old 9th July 2012, 09:06 AM   #4
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ADC made commercial/military grade transformers - I've got some coupling transformers that are speced as +/- 0.1dB across the telephony range, and happily go flat beyond my audio measurement range. Yours may be excellent, and have a DC mA rating as well, so may work well as a SE valve driven line driver.
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Old 9th July 2012, 09:59 AM   #5
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look like they may be sonar transducer matching transformers??
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