Additionally, the item must arrive back to us undamaged and in the original condition in which it was sold-no modification, alterations, etc. For example, in a DuMont type - 208 cathode - ray oscillograph the. According to the instruction manual, The Du Mont Type 304-A is a general-purpose cathode-ray oscillograph that enables rapid, accurate amplitude measurements. We will refund the purchase price of the item, however, the buyer is responsible for return shipping in this case. control of the cathode - ray tube plate potentials. DuMont Laboratories, Awake, While SleepwalkingLolita Robinson. Its a little known fact that during the 1940s the premier Twitter client was a cathode ray oscillograph vector display, such as this DuMont Labs 208B. DuMont had developed an improved version of the cathode ray tube which was both cheaper to produce and was longer-lasting than the German tubes used at that time the imported tubes had a life of 25 to 30 hours. A 30-day return period also applies to items that arrive in the condition described in the listing. (New Longman Literature 11-14)Kaye Umansky, You Cannot DieIan Currie, DuMont Cathode-Ray Oscillograph Type 329-A.Inc. DuMont 164 Oscillograph (1939-40), an early general purpose oscillograph. We will cover the return shipping on warrantied units.Ĭontact us if you have any questions or concerns. We have been purveyors of New England antiques for 46+ years and have recently retired. ![]() This is a heavy piece and will be sold for LOCAL. It must be re-cognized, however, that trouble may be expected at some time during the life of the instrument. We offer a 30-day DOA warranty on all of our items EXCEPT those listed for parts or repair. Oscillograph Cathode-Ray Type 175A Allen B. The Type 301-A Cathode-ray Oscillograph is designed and built so that comparatively little attention should be necessary, under normal condi-tions, to maintain the equipment in good working order. Items must be picked up within 10 business days of being paid for, unless prior arrangements are made. We accept PayPal payments, credit card payments through PayPal, or cash on pickup (by appointment) from our warehouse in St. Montage of the evolution of cathode ray tubes from light. Please contact us if standard shipping is the only option listed and you need to upgrade to a faster service. Close Up of a Vintage Cathode Ray Oscilloscope developed by DuMont. Orders completed after 1:00 pm EST will be shipped on the following business day. Items paid for before 1:00 pm EST will ship the same business day. No returns will be accepted for this unit. Moreover, these measurements may be made in a minimum of time, qulifying the Type 304-A as a quantitative as well as a qualitative instrument.Unit is untested, we are selling it as is for parts or repair. Unlike electro-mechanical devices, the Type 304-A is not restricted to rms or peak-to-peak readings of voltage, as any amplitude portion of the input signal may be measured with the instrument. Tennis for Two is considered to be the very first video game, developed for a Donner 30 analog computer in 1958 and displayed on an oscilloscope. All items in this museum are unclassified. ![]() 1950s.Exhibit in the National Electronics Museum, 1745 West Nursery Road, Linthicum, Maryland, USA. J., began manufacturing cathode-ray tubes and later also made cathode-ray oscilloscopes. English: Dual-beam Cathode-Ray Oscillograph, DuMont Laboratories, Clifton, NJ, USA, Type 322-A, S/N 9883, for 115/230 Volt AC, with scale illumination around the knobs, ca. "To obtain the utmost from the Type 304-A, full advantage should be taken of the novel amplitude calibrating system of the instrument which permits signal amplitude measurements in volts directly from the screen. Dumonts new company, in the basement of his home in Upper Montclair, N. The high gain assures that the Type 304-A can be used directly with most transducers, while d-c amplification provides that the lowest frequency portions of signal will be faithfully reproduced." ![]() Function Used to provide accurate time and amplitude of measurements of voltage signals over a wide range of frequencies.Īccording to the instruction manual, "The Du Mont Type 304-A is a general-purpose cathode-ray oscillograph that enables rapid, accurate amplitude measurements of any portion of a 0-to 1000-volt signal, from d-c to over 50,000 cps.
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