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Question : stereo tape head preamp

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by sairam.simha, Jul 15, 2005.

  1. sairam.simha

    sairam.simha New Member

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    hi can anyone guide me as to how to use the 741A (dual op amp) for pre amping a stereo tape head.

    thanx in adv
  2. Nigel Goodwin

    Nigel Goodwin Super Moderator Most Helpful Member

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    A 741 is a VERY bad choice, it's an ancient low spec opamp, there are many much better opamps to use (and probably none that could be worse?). A tape head preamp requires very high gains and low noise, a 741 would not really be suitable.

    A quick look on Discovercircuits gave this link http://www.electro-tech-online.com/...0Head20Preamplifier20For20PC20Sound20Card.pdf.
  3. chemelec

    chemelec Well-Known Member

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    You will also need the Proper Frequency Compensation for your Preamp.
    I think its an "NAB" Curve for Tape.

    There is a Transistor Preamp on my site that is Suitable, but you will need to come up with the part values for this NAB compensation.
    I have determined the values for an "RIAA", Phono Comp, But never had a reason to figured out the NAB Tape Comp. It is Simular to the RIAA, But a bit different Slopes.

    This is a Good Preamp and works best with a Supply of 15 Volts, and up to 40 volts.

    http://www3.telus.net/chemelec/Projects/Preamp/Preamp.htm

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