Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 4, 2025
Distances of from 200 to 500 miles can be successfully covered with a telegraph transmitter using two, three or four 5 watt oscillator tubes in parallel. The apparatus needed is identical with that used for the 100 mile transmitter just described. A 500 to 1,000 Mile C. W. Telegraph Transmitting Set.
Next step was to check the spacemonk's instruments' circuits. Rick picked up a tiny stethoscope. It would be taped to the monk's body, held tightly to his heart. He traced the circuit to where it disappeared into the oscillator switch, then took the walkie-talkie. "Display on? Checking the stethoscope." "Go ahead," Earle replied.
His examples of the steam-engine are nearly all from American models, and include the oscillating engines of the "Golden Gate," the last important advance in the construction of the marine engine; for, although the form of the oscillator has been known for years, it had never been applied to marine uses until the success of the "Golden Gate" proved its applicability to the heaviest engines.
The club transmitter consisted of 4 valves in a Hartley parallel push-pull oscillator circuit which we considered to be of relative 'high power' perhaps all of 10 watts." Takis continued: "In 1930, my family, like many other families of Greek origin, moved to Athens. I built a cw transmitter using four Philips valves.
Cupid tossed his curls in the direction of the moving staircase, which in Toyland was known as the "Oscillator." A bored-looking youth was stationed officially at the top in order to catch any ascending lady who might threaten to fall; but as only the oldest and frailest ever did so, his bored expression had become chronic. "Chap's down at the foot o' that," confessed the boy.
For this telephone transmitting set you need: one aerial ammeter; one tuning coil; one telephone modulator; one aerial series condenser; one 4 cell dry battery or a 6 volt storage battery; one microphone transmitter; one battery switch; one grid condenser; one grid leak; two 5 watt oscillator tubes with sockets; one blocking condenser; one oscillation choke coil; two filter condensers; one filter reactance coil; an alternating current power transformer, and two 20 watt rectifier vacuum tubes.
Further, a single 50 watt oscillator tube will send to distances of 50 to 100 miles while two of these tubes in parallel will send from 100 to 200 miles. Finally, where four or five oscillator tubes are connected in parallel proportionately greater distances can be covered. A Short Distance Wireless Telephone Transmitting Set-With 110 Volt Direct Lighting Current.
This put the powerful Arcot oscillator tubes into action, and the power was ready for application. Slowly he closed the rheostat and put the power into the coil. The little sliver of metal on the slide seemed to throb a bit, and its outline grew hazy; but at last, with full power on, the release was so slow as to be imperceptible. "Guess we need the magnet after all; I'll put it on this time."
A rheostat of this kind is shown at I and is listed at $1.25. The Oscillation Choke Coil. This coil is connected in between the oscillation circuits and the source of current which feeds the oscillator tube to keep the oscillations set up by the latter from surging back into the service wires where they would break down the insulation.
"Hmm, let's see," Tom mused as he settled down at his workbench, pencil in hand. "Besides a regular sonarscope, I'll need at least three units for the gear." First, he would need an oscillator to produce the complex pulse. Next, of course, an oscilloscope to check the pulse as it was beamed out. Last but highly important a correlation calculator.
Word Of The Day
Others Looking