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    De Havilland Tape Preamp

    Awesome info, thanks. I asked Kara if she had ever tried a transformer in place of the OP amp, she said she had not, as it would drive up the price considerably. DIY is the path I may go down as well. A transformer to three tube stages and a cathode follower is what I have in mind. For...
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    De Havilland Tape Preamp

    From Kara Chaffee, posted here with her permission: Hi Brett, The heads in the 10-20mH realm are too low for the 222. Most other heads are 150mH and up, which work fine. I have customers with Flux heads, but you should verify the impedance of the ER head. The 222 uses a really special...
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    De Havilland Tape Preamp

    I'm not crazy about the OP amp in there. I didn't realize there was a cathode follower in there. I thought it was an OP amp feeding an Ampex 351 'inspired' 12AX7 input/eq with a discrete class A BJT output. I actually wrote Kara today asked about the topology and about using FMER heads. The...
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    De Havilland Tape Preamp

    I wrote Wayne Colburn of Pass Labs yesterday as to why his phono preamps use single-ended inputs instead of balanced: Hello Wayne, I am hoping you can explain to me why you use single-ended inputs only on your phono stage designs. I always think of any output from a coil transducer, be it a...
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    De Havilland Tape Preamp

    Hi Bruce, I am considering purchasing a De Havilland for use with my A80RCmkII. Did you ever get the RF issues sorted out? If so, what did you think of it's performance?
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    De Havilland Tape Preamp

    Hi, what did you end up thinking of the piece once you put some hours on it?

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