A n Electronic 1000-Cycle Sine Wave Oscillator (Editor's Note) FATHER F. C. Hickey, of Providence College, has pointed out two errors in the article of the above title, by Morris J. Heldman, which we published in our November, 1944, issue. F i s t , in the parts-list below Figure 1, on page 553, the tube designations for V, and V2 have somehow been interchanged. The diagram shows that VI and VB are, respectively, triode and pentode, and anyone suf-
ficiently familiar with electronics will know that this order corresponds with the respective tube designations 35L6 and 12SJ7. Second, experience in constructing this apparatus showed that satisfactory operation required a grid leak of 50,000 ohms between the control grid of tube Vzand the ground. After this, a very satisfactory sine wave was obtained on the oscilloscope.
When you know you ore doing your job perfectly--look for uloys to improve i t a r someone else will.
