. The design and construction of a radio station for the Armour Institute of Technology . I 70. rheostat control furnishes current toall three bulbs in multiple. The detectorhas a separate £ potential battery of25 volts while the amplifier plates receivetheir potential from a filler circuitoperated from the HO volt lighting condensers across the primaryand secondary receiving coils aid in tuningwhile another across the telephones im-proves the pitch of the received 71. ... )] I Jl . • ..... .. JORY_ A vacuum tube connected asin Pig 31 may be employed to generate thelo
. The design and construction of a radio station for the Armour Institute of Technology . I 70. rheostat control furnishes current toall three bulbs in multiple. The detectorhas a separate £ potential battery of25 volts while the amplifier plates receivetheir potential from a filler circuitoperated from the HO volt lighting condensers across the primaryand secondary receiving coils aid in tuningwhile another across the telephones im-proves the pitch of the received 71. ... )] I Jl . • ..... .. JORY_ A vacuum tube connected asin Pig 31 may be employed to generate thelocal radio frequency currents for beatreception, ihe grid and plate circuits areuopjiled through coils 12 and L3. The gridcircuit is tuned to a given frequency ofoscillation by the condenser G-I and theplate circuit by the condenser C-2. -heconditions present in the plate circuitare substantially those of the circuitof . : here an oscillation circuitincluding coil 1 and condenser 0 is shuntedby the battery B, the circuit being im-pulsed by the opening and closing of theswitch S, ,/hen the switch 6 is closed theenergy supplied by the battery is storedtemporarily in coil L and condenser C butwhen switch S is opened this stored energyis released and the stored energy is madeto oscillate in the circuit LC at a radiofrequency determined by the product of thecapacity and the inductance of the circuit. 72. How switch S oan be considered to bereplaced in Pig 31 by the valve gridS which var
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Keywords: ., bookcentury1900, bookdecade1920, bookiddesignconstr, bookyear1920
