Stupid question on Airline Valco schematic

[monfi]

Hello, if I wanna sobstitute power section of this schematic,with a IC poweramp, what part of circuit i've to "remove"? (I not think is all things put after R10)
tnx in advance

[phatt]

Yes R10 is the power amplifier input.
Phil.

[monfi]

  :dbtu:tnx

[J M Fahey]

There´s a couple details to take care of:

1) that amplifier is a single supply (+46V)  type, any chipamp you use will also need to be used in a single supply mode, some datasheets suggest one.
Most are dual supply.

2) being single supply, it needs capacitor coupled input *and*  output.

3)an LM3886 would be happy with a +46V supply and will last forever; a TDA2050 is just on the edge, will work properly but heat sink it well just in case.

[monfi]

 :tu: thank you very much