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Updated: May 7, 2025
This device is built on exactly the same principle as the telephone induction coil just described but it is more effective because it is designed especially for modulating the oscillations set up by vacuum tube transmitters. As with the telephone induction coil, the microphone transmitter is connected in series with the primary coil and a 6 volt dry or storage battery.
If the Enemy after parrying Tierce shou'd Rispost strait or under, to the first you may disengage and volt, and to the other volt strait, advancing the left Foot a little in Lunging, in order to have the Liberty of Volting, because you cannot easily do it when you are extended: It is more easy to take the Time opposing with the left Hand; and 'tis best of all to parry and thrust strait in Quarte; if after having pushed Tierce, on your Recovery to Guard, you find you have the Command of the Enemy's Sword, or that he advances uncovered, you, must in these Cases push strait in Tierce if he disengage you must take the time and push Quarte, if he comes to your Sword with his Fort, you must cut under in Seconde, if with his Feeble, disengage in Quarte, it is also good after having pushed Tierce to recover with your Sword high, giving Light under, and if the Enemy pushes there, you must take the Time opposing with the left Hand, or Parry and Rispost.
This done connect one end of the choke coil to the conductor that leads to the plate and connect the other end of the choke coil to one of the taps of the switch on the panel cut-out. Connect the + or positive electrode of the storage battery to the other switch tap and between the switch and the choke coil connect the protective condenser across the 110 volt feed wires.
You can, however, use 110 volt direct current from a lighting circuit as your initial source of power to energize the plate of the vacuum tube oscillator of your experimental transmitter. Where you have a 110 volt direct current lighting service in your home and you want a higher voltage for your plate, you will then have to use a motor-generator set and this costs money.
Where more energy is needed it is better practice to use a transformer and this can be worked on an alternating current of 110 volts, or if only a 110 volt direct current is available then an electrolytic interrupter must be used to make and break the current.
With Direct Current. When a 110 volt direct current is used to energize the power transformer an electrolytic interruptor is needed to make and break the primary circuit, just as a vibrator is needed for the same purpose with a spark coil.
This is made to take care of a 10 volt current and it costs $10.00. The Filament Storage Battery. This must develop 12 volts and one having an output of 40 ampere-hours costs about $25.00. The Protective Condenser. This condenser has a capacitance of 1 mfd. and costs $2.00. The Motor-Generator.
The electromotive force of each thermo-electric element did not exceed 0.036 of a volt, and 1,800 elements were therefore necessary to work an incandescence lamp. A most useful application of the thermo-electric battery for measuring radiant heat, the thermo pile, was exhibited.
Tho' Volting is not best in Combat, yet it may on some Occasions be necessary, besides it is my Business to speak of them, at the same time advising that 'tis much better to make use of Parades and Risposts, than of Time of what Sort soever. The Joining on a Volt is the same as on passing in Quarte. Of Joining or seizing the Sword.
This done connect the other terminal of the filament to one post of the rheostat, the other post of this to the or negative electrode of the 6 volt A battery and the + or positive electrode of the latter to the other terminal of the filament.
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