Report 0-30V 0-3A Latest Data in Projects Q/A Posted January 29, 2017 On 4.1.2017. at 3:50 AM, audioguru said: To use your transformer then many resistor values will need to be re-calculated and changed. The 16.6VAC will have a peak voltage of only 23.5V. The improved circuit is designed to use a 28VAC/4.3A or 30VAC/4A transformer. If you re-design the circuit then with your transformer its maximum regulated output will be about 16.5VDC at about 1.5A. Thank you very much!