Power Lab 711 (711K, 711W)

The Precise Power Lab 711 combines a variable high current low voltage power supply with an isolation transfomer that can be used independently or can be switch-connected as series-aiding or bucking for a variable isolated supply up to 3 amps AC for 90-140 volts, which can in turn be selected as rectified and filtered from 110-180 VDC at 75 mA continuous. 

Variable low voltage at high current is available as AC from 0-24 volts up to 20 amperes or DC from 0-15 or 0-30 Volts at 10 amps continuous. 

The high current low voltage variable AC can also be switched to boost or buck line voltage directly from 90-140 VAC up to 10 amps continous but without isolation.  The 711 was available as either 711K (kit version) at $49.95 or 711W (wired version) at $64.95.  The 711 isolation transformer was rated at 100 watts.  A model 713 was also available at higher cost but increased isolation transformer output to 300 watts.  

In questo link sono elencati 46 modelli, di cui 45 con immagini e 14 con schemi.
Elenco delle radio e altri apparecchi della Precise Development Corp.; Oceanside, Mineola, NY