203.63.20.127
This Post Has Been Edited by the Author
In Reply to: RE: More questions regarding voltage regulator tubes posted by vetmedrobert@gmail.com on August 03, 2017 at 12:36:51
Vs 230VDC drop to 150V = 80V, so your calculation is not based on a 230V drop, but rather the 80V. (good news for you).
Load current is 10mADC
Say you want 10mA to the load and 15mA through the shunt,25mA total. And if you pull the load the VR tube can sink this 25mA with no problem, OK. We are talking DC current here.
If you want to drop 80V at 25mA = 3k2 (3k3) power dissipated is the DC current squared multiplied by the resistor. In this case 2W. Use a 10W wire wound resistor and be done with it.
Been there, done that. You know.. in time consider a series CCS to the shunt.
3k3 5W+, 10W better and go !!
Shane.
Follow Ups:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2017, Audio Asylum, all rights reserved ]
[ Take5 ]