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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Rolling the RANE AC23
Rolling the RANE AC23
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Old 1st September 2012, 11:05 PM   #1
midyim is offline midyim  Australia
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Default Rolling the RANE AC23

A long time ago I replaced the duals with AD712s & the quads with LT1058s.

I have a small stash of AD797an which I could implement with adapter boards to replace the duals....but not for the quads.

? Is it worthwhile updating to more current ICs eg: OPA627s/AD797BR or AR....these been available as plug in modules off the net.

Thks....eng hoe
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Old 1st September 2012, 11:54 PM   #2
ticknpop is offline ticknpop  Canada
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Rolling the RANE AC23
You need jfet input opamps only or the bias current iof bipolar opamp inputs upset how the bandpass filters work.
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Old 2nd September 2012, 12:42 PM   #3
midyim is offline midyim  Australia
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Ok...the ICs I mentioned are Fet inputs.

Thks...eng hoe
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