Using Fixed Condensers

Radio Record, Volume II, Issue 31, 15 February 1929, Page 27

Using Fixed Condensers

Me ST amateurs have one or two spare fixed condensers on hand, but not everyone knows that a great many sets would greatly benefit by the addition of a "001." The idea is that: in con-denser-controlled reaction sets (popularly called "Reinartz reaction’) the reaction condenser should have a fixed condenser of about .001 mfd. in series with it, to prevent H.T. shorts. To insert the condenser, first of all examine the connections to the reaction condenser. In most sets: you will find that one of its. sets of plates is connected to H.T. positive (possibly via reaction coil), and the other set of plates is connected to the filament wiring. All you have to do is to break one of these leads and connect to condenser in series. In other words, cut the lead and take one of the ends to one side of the fixed condenser and the

other to the other side: of the fixed condenser, There will be no alteration to reaction effects, ete., but now, if the reaction condenser plates are accidentally shorted, no damage will -result from stray H.T.