Original Roland EXB-G810860S VCF/VCA Resistor Array - Part 13919166 - Tested. You are viewing a used original Roland EXB-G810860S VCF/VCA resistor array, Roland part no. 13919166. This part is used in the Roland Alpha Juno-1 / HS-10, Alpha Juno-2 / HS-80, and MKS-50.