preamp circuit - chip options

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lordearl

Member
Joined 2007
Just bought this board (see attached circuit), with OPA604 installed.

What measurements are important to take before trying, say, AD843 or LME49710?
 

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AndrewT

R.I.P.
Joined 2004
a filtered square wave into a variety of reactive loads.

Has the pre-amp input got at least 10dB of overload headroom above the maximum input signal you are likely to send?

Are there any filters at the input of the pre-amp?

Do I read >+20dB of gain correctly?

There are hints of Walt Jung in the schematics, but whoever designed it, ignored much of Walt's advice.
 
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