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Phil Allison[_4_] Phil Allison[_4_] is offline
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Default Input transformer for Spectra Sonics 101 preamp

Rick Ruskin wrote:

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No, because the input impedance on those is already 600 ohms. It is
dominated by the emitter resistor on Q1. If you put a step-up transformer
on there, you get an even lower input impedance which is probably not
what you want.

There's no free gain to be had here.




The current version of these units state 64db of gain with the same
101 card.



** Bull****, it ain't the same card.

An input tranny that gave 10dB more gain would reduce the impedance to 60 ohms. Way to low for any modern mic.


You won't take no for an answer - will you ?


...... Phil