Show where trouble comes in in altering your S C set the trouble in altering the single circuit set lies in getting the tube to oscillate at the high waves and also ta in the loss ot of volume and distance reception when dry cell tubes are used in trying to overcome these two things tile the ultra audion circuit has been suggested at different times but this circuit in itan standard form also has shortcomings making it little better it if any than tb anthe the tuned plate circuit the receiver described herein Is an improved ultra andton circuit t that ills fills secondary circuit connected in ultra audion manner the bill both in iii ease eade ot at oscillation and in distance of reception A glance at the he circuit will show to the tan fan that it to Is a two circuit tuner with the secondary circuit connected in the ultra audion manner the primary and secondary colls coils of the set are the stator and rotor respectively ively ot of an ordinary varlo coupler the secondary darf tuning condenser roay may bo be the one formerly used in the aerial circuit of the old single circuit tuner the other variable condenser has a capacity of this condenser li Is included for the purpose of eradicating the fault of the old standard ultra audlin circuit L e uncontrollable oscillations the two fixed condensers shown in the secondary circuit must be good mica condensers that will not blow when tile the U B Is applied otherwise the tube used in the set will be burned out the grid condenser and leak are standard it Is suggested that the experiment with the grid leak in tats set after he be has earned arned tile the tuning tuala try values and also try shifting it from Is its Is pres present eaf position to ono one wherein it Is connected from the grieto the negative or positive e filament new york sun |