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For this experimental continuous wave telegraph transmitter get the following pieces of apparatus: one single coil tuner with three clips; one .002 mfd. fixed condenser; three .001 mfd. condensers; one adjustable grid leak; one hot-wire ammeter; one buzzer; one dry cell; one telegraph key; one 100 volt plate vacuum tube amplifier; one 6 volt storage battery; one rheostat; one oscillation choke coil; one panel cut-out with a single-throw, double-pole switch, and a pair of fuse sockets on it.
This is the same kind of a hot-wire ammeter already described in connection with the experimental set, but it reads to 5 amperes. The Grid and Blocking Condensers. Each of these is a fixed condenser of .002 mfd. capacitance and is rated to stand 3,000 volts. It is made like the aerial condenser but has only two terminals. It costs $2.00. The Key Circuit Apparatus.
In the very act 'twas while Jennifer was clutching at her bridle rein to stay her from riding fair between us I felt the hot-wire prick of the steel in my shoulder and knew that my enemy had run me through as I stood. Of what befell afterward I have but dim memories. There were more hoof-tramplings, and then I felt the dewy turf under my hands and soft fingers tremblingly busy at my neckerchief.
Any other good microphone transmitter can be used if desired. Connecting Up the Apparatus. Now connect clip 1 of the tuning coil to one of the posts of the hot-wire ammeter, the other post of this to one end of aerial condenser and, finally, the other end of the latter with the water pipe or other ground.
For this experimental continuous wave telegraph transmitter get the following pieces of apparatus: one single coil tuner with three clips; one .002 mfd. fixed condenser; three .001 mfd. condensers; one adjustable grid leak; one hot-wire ammeter; one buzzer; one dry cell; one telegraph key; one 100 volt plate vacuum tube amplifier; one 6 volt storage battery; one rheostat; one oscillation choke coil; one panel cut-out with a single-throw, double-pole switch, and a pair of fuse sockets on it.
For this transmitter you require: one oscillation transformer; one hot-wire ammeter; one aerial series condenser; one grid leak resistance; one chopper; one key circuit choke coil; one 5 watt vacuum tube oscillator; one 6 volt storage battery; one battery rheostat; one battery voltmeter; one blocking condenser; one power circuit choke coil, and one motor-generator. The Oscillation Transformer.
This instrument is also called a hot-wire ammeter because the oscillating currents flowing through a piece of wire heat it according to their current strength and as the wire contracts and expands it moves a needle over a scale. The ammeter is connected in the aerial wire system, either in the aerial side or the ground side the latter place is usually the most convenient.
Any other good microphone transmitter can be used if desired. Connecting Up the Apparatus. Now connect clip 1 of the tuning coil to one of the posts of the hot-wire ammeter, the other post of this to one end of aerial condenser and, finally, the other end of the latter with the water pipe or other ground.
This is the same kind of a hot-wire ammeter already described in connection with the experimental set, but it reads to 5 amperes. The Grid and Blocking Condensers. Each of these is a fixed condenser of .002 mfd. capacitance and is rated to stand 3,000 volts. It is made like the aerial condenser but has only two terminals. It costs $2.00. The Key Circuit Apparatus.
This instrument is also called a hot-wire ammeter because the oscillating currents flowing through a piece of wire heat it according to their current strength and as the wire contracts and expands it moves a needle over a scale. The ammeter is connected in the aerial wire system, either in the aerial side or the ground side the latter place is usually the most convenient.
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