Alternator gauge question

I rigged up my Tektronix meter and took a test drive.It's charging 12.37 parked & climbs up to 16 volts at cruise. This is consistent with the Amp(Alternator) Gauge. Battery holds charge. Car starts fine other than having to jump solenoid. Other than Autometer Temp & oil pressure gauge, there's no extra Electrical stuff, no radio, fans etc. Definitely got a charging system problem . Now I just have to diagnose the Voltage Regulator and wiring to it.