Show filament control jack saves 5 aves overloading tubes by H 8 S DOLESKI the illustration shows shown a filament filar nent control jack for two tubes I 1 experienced a blown tube when turning out opt me second tube to guard accy further trouble of the same kind I 1 devised the control DET ill showing control arrangement to protect tubes with ith ft n shown to bal ance the lie first turn oil in both tubes and adjust the lie vol 01 ol time then plug in the lie first till tube only und and adjust the resistance for lie file bk st volume but bill lu do not touch the lie rheostats with tills this no tube will be overl 0 I 1 with etli either plug in use kudlo |