First transistor

Replica of the first working transistor invented in 1947 by John Bardeen, Walter Brattain and William Shockley at Bell Laboratories in the United States.

On this day in tech history, the “Miracle Month” concluded with the presentation of the transistor by Bardeen, Brattain, and Shockley to senior management at Bell Labs.

This radio was marketed under a number of brand names including Sharp, Continental (model TR-300) and Radionette (model 8R-48 or SR-48). Michael Jack has the Radionette version listed as model SR-48 on his Flickr post. A Faucher (Montreal) store newspaper ad lists it as model 8R-48.

Temperature Sensor Circuit fan control Wiring: A temperature sensor has been used to measure the temperature of the room fan control using B...

1955CK722RegenSchematic

7CW (MMBT2222A) NPN SMD Transistor. FEATURES: High current (max. 600 mA) Low voltage (max. 40 V) NPN switching transistor in The post 7CW SMD Transistor (MMBT2222A) Datasheet appeared first on Electrical Learner.

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1956 Regency shortwave converter.

This radio was purchased at Korvettes on May 28, 1964. The price was $17.89.

I've been fiddling around with a brushed DC motor, a 2N2222 and an arduino's PWM to get different speeds out of my motor. Now, based on a video tutorial I watched on youtube, It was recommended to ...

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Before you can comprehend how a PCB transistor functions, you must first understand what a transistor is and what to check for when choosing one. Before you purchase a PCB transistor, you must learn how you should test one. What is a PCB Transistor? Transistors are electronic devices that regulate the flow of electrons and […]

first working transistor replica 1947

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1000W Monoblock Power Amplifier . This is an audio amplifier circuit provides power to 1000 watts. This interesting routes under a lot...

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From the RadioMuseum.org site: The Philco model T-7 series includes Philco's first transistor radio. The first version, model T-7 Code 124, was introduced in 1956 for the 1957 model year, and was followed by T-7 Code 126, which is identical in design except for slight circuit changes and one different transistor for the audio driver. Both of these versions have a painted metal perforated grill which is large enough and soft enough that the owner's thumbs and fingers could dent it just by…

Explore France1978's 32193 photos on Flickr!

Explore France1978's 32221 photos on Flickr!

Presented FM transmitter is built around low power PLL transmitter and amplifier that boosts its signal all the way up to 6 Watts. The signal is amplified by three RF stages of amplification. In the first and second stages of the transmitter one of the best driver transistors were used 2SC2053. You can use the other transistors but only up to 500mW of power. In the third stage 2SC1971 RF transistor was used to achieve 6W of power. For making any RF transmitter circuit at least two meters are…