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Old 24th August 2011, 02:42 PM   #1
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Default Help with 1:2 line level input Tx's

I have a SE 2A3 amp with choke loaded (150H) 6J5 drivers. The sensitivity is around 2Vrms. I would like to get this down to about 1Vrms. A friend suggested using line level 1:2 Tx's at the inputs.

Morgan Jones doesn't address the topic so I'm lost.

Will this work?

Where can I find design/application text?

Where can I get the Tx's?

Or....any comments or suggestions.


Thanks
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Old 24th August 2011, 03:49 PM   #2
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Try the amorphous Lundahl LL1676. Great transformer! But you should go 2:1, not 1:2!
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Old 24th August 2011, 04:14 PM   #3
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1:2 sounds about right to me. You want to step the voltage up from 1V to 2V, so the amp is more sensitive, correct?
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Old 24th August 2011, 04:25 PM   #4
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Quote:
Originally Posted by revintage View Post
Try the amorphous Lundahl LL1676. Great transformer! But you should go 2:1, not 1:2!
He's wanting to change the input sensitivity from 2 volts to 1 volt, which would require a step-up transformer, in which case the proper nomenclature would be 1:2, not 2:1.

se
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Old 24th August 2011, 04:27 PM   #5
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Hammond 560Q is good and fairly priced:
Hammond Mfg. - Broadcast Quality Audio Transformers - (560, 800-844 & 850 Series)
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Old 24th August 2011, 05:05 PM   #6
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Sorry, missread your post. In this case, note input impedance will be lowered 4 times.
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Old 24th August 2011, 05:33 PM   #7
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Quote:
Originally Posted by revintage View Post
Sorry, missread your post. In this case, note input impedance will be lowered 4 times.
Yup!

se
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