joeyjojo
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Quote:
Probably $5-600 for a bare minimum build
Yep this is better (I was allowing for a larger attenuator)
Probably $5-600 for a bare minimum build
Fourth, I'm looking at this power entry module (Mouser 631-FN282B-6-06). It's cheaper than the non-medical grade ones for some reason, OK to use?
If you're using a source that is "too hot", then you might want to add an input attenuator at the amp. Here is a schematic of a switchable attenuator. It is drawn for an unbalanced (2 or 3 channel) amp, for a 4-channel balanced amp you'll need to double everything for the negative signal, and use either a 4PDT switch, or two DPDT switches.
If you use the same value for all the resistors, then the attenuator will drop the effective gain of the amp by one half (-6dB). A good value to use is anywhere from 10K to 47K.