I"m quite new with this rejuv. thing, that said,....Today 1 Beltran showed up, the one without the manual, I got all excited and
hooked it up. None of the adapters fit, so I had to make one, The test was a Sony tube... I may be wrong here and I wont know till
I see the manual with the other one...But unlike the 470, This thing seems to rejuv. @ a lower voltage and a higher amperage, while
fluctuating the heater voltage ,Result Awesome 1st test, This thing is a beast!...The 470 on the other hand seems more newbee/user
friendly, and the adapters are still available.