[sdiy] Prophet 10 op-amp swaps?

Oakley Sound oakleylist at btinternet.com
Thu Jul 11 10:20:06 CEST 2013

 > Any thoughts on why that CA3280 on the output board would be running 
so hot? Tony, do you remember if yours got toasty as well?

I can't remember them getting hot to be honest. However, looking at the 
schematic again each Iabc pin could take a maximum of 4mA or so which 
would, when the OTA is fully on, mean that the IC is dissipating at 
least 120mW.

Does the 3280 get cooler if you turn down the master volume?



More information about the Synth-diy mailing list