Search results
Results From The WOW.Com Content Network
The HP 200A, first built in 1938, was the first product [1] made by Hewlett-Packard and was manufactured in David Packard's garage in Palo Alto, California. It was a low-distortion audio oscillator used for testing sound equipment. It used the Wien bridge oscillator circuit, that had been the subject of Bill Hewlett's masters thesis.
Pages for logged out editors learn more. Contributions; Talk; HP200A
The O-200 is an updated and upgraded version of the engine, achieving increased power of 100 hp (75 kW) as a result of higher maximum rpm. The standard and most common model of the engine is the O-200-A; the -B model is designed for a pusher installation, the -C model provides for the installation of a controllable-pitch propeller, and the -D ...
Some companies do sell positive tempco thermistors but it is a very small market. All metals have positive tempcos. HP's 200A oscillator used a lamp with a metal filament to stabilize the Wein bridge oscillator because of its positive tempco. As the bridge current increases the lamp filament gets hotter, increasing its resistance.
Hewlett and Packard's first financially successful product was a precision audio oscillator known as the HP 200A, which used a small incandescent light bulb (known as a "pilot light") as a temperature dependent resistor in a critical portion of the circuit, and a negative feedback loop
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Version produced by Canada Air RV and AC Millennium, with gross weight of 1,500 lb (680 kg) and powered by a 100 hp (75 kW) Continental O-200A, 74 hp (55 kW) Rotax 618 two-stroke, 80 hp (60 kW) Rotax 912 or 100 hp (75 kW) CAM 100.
Meyers 200A. 200 — single prototype powered by Continental O-470; 200A — production version powered by Continental IO-470 (11 built) 200B — (17 built) 200C — raised roof-line and larger windshield (9 built) 200D — engine replaced with Continental IO-520-A and flush riveted wings (8 built)