( So that Granny Goodknockers radio couldn't pick up her favorite, Queen for a Day program, when it came on the air . . . nuttin' but static ! ) |
Hi all...I recently picked up a "Trouble Finder, series no. 198" made by the Davis Emergency Equip. Co. 67 Wall St. New York." Yes all that is printed on the front bakelight pannel..It has 4 UX199 tubes and works like new using 6v for tubes and 45V and picks up many stations..It also has 1 tuner and two knobs...one for volume control and other for filament..I am guessing it was made around 1923-25..All in a wooden case w/ handel..Batteries could be stored inside of case..It uses a set of head phones...I would like to find more info on manufacture and what exactly this was suppose to be used for...
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:Sir George. . . . .
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:Poss-i-bleee that might be an early day piece of signal tracing equipment associated with use by the power line companies.
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:In accordance to your guesstimate of its vintage, if being a bit later on into the evolved use of tubes, where there was the actual creation of Continous Wave RF by transmitters and more selective receivers coming online.
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:I could see the use / need of a portable "interference" detecting receiver for either tracking down of just plain power line related inteference or else customers equipment, tied into them, being the actual source of problem.
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:( So that Granny Goodknockers radio couldn't pick up her favorite, Queen for a Day program, when it came on the air . . . nuttin' but static ! )
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:There is even the possibility of an experimenter still trying to make /use of an old damped wave xmitter.
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:( Read that as a HIGH voltage coil connected up to a spark gap to have it then arcing across, to create the signal. )
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:An antenna is connected to one end and ground to the other lead. That unit will then put one FIERCE amount of interference . . . aka . . . STATIC . . . it blanketing the whole AM / SW bands .
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:In that case, in searching for it, they would be having to take reception checks at different proximities to the intefering source, to find its strongest reception, thus being closer to it.
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:Should it have been a bit later in time, with the advent of loop antennas, there would be the additional aid of just rotating the loop 90 degrees. If the loop is broadside to the direction of the inteference, its reception will be at its strongest. If at a 90 degree to the inteference, the signal will weaken and null out and then start increasing in strength again.
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:I still use a portable transistor, to this day, in the "sniffing " out of inteference . . . along with the flipping of select circuit breakers.
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:If needed out in the " boonies " I'm pulling my one stored in the glove compartment, which gives me a " radio compass" in nulling in on a towns AM radio station.
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:(With the one exception . . . if you think that you are heading for Canada . . . you just might end up in Mexico . . . [ no front to back differentiation] . . . unless you laterally sidetrack a bit to be able to triangulate and recheck to seek out the error.
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:73's de Edd
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:Hi all...I recently picked up a "Trouble Finder, series no. 198" made by the Davis Emergency Equip. Co. 67 Wall St. New York." Yes all that is printed on the front bakelight pannel..It has 4 UX199 tubes and works like new using 6v for tubes and 45V and picks up many stations..It also has 1 tuner and two knobs...one for volume control and other for filament..I am guessing it was made around 1923-25..All in a wooden case w/ handel..Batteries could be stored inside of case..It uses a set of head phones...I would like to find more info on manufacture and what exactly this was suppose to be used for...
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