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Homemade Magnetic Amplifiers. - Spark, Bang, Buzz
http://www.sparkbangbuzz.com/mag-amp/mag-amp.htm
A magnetic amplifier is a circuit that uses changes in core saturation of an inductor to bring about amplification. A small amount of DC current change from the 9 volt battery and a 1k pot can cause a large amount of AC current change through a …
Homemade Magnetic Audio Amplifier. - Spark, Bang, Buzz
http://sparkbangbuzz.com/mag-audio-amp/mag-audio-amp.htm
Magnetic audio amplifier schematic. High impedance signals can be fed into the input of this circuit by using a matching step down transformer such as the Bogen T725 or similar. It is sometimes helpful to bypass the output of the …
Homemade magnetic amplifiers made from common …
https://www.youtube.com/watch?v=DBX1-POuJMw
More info is available at http://www.sparkbangbuzz.comHomemade magnetic amplifiers can be made from common transformers and toroids. This video shows the co...
Magnet Amplifier (new info) | diyAudio
https://www.diyaudio.com/community/threads/magnet-amplifier-new-info.165993/
Homemade Magnetic Audio Amplifier. Homemade Magnetic Amplifiers. This is a tantalizing bit from the first site I listed site: "The mag amp is true amplification without the use of tubes, transistors or IC's but it does require the use of an AC power source. While most ac oscillators require the use of transistors, this amp could conceivably run ...
MAGNETIC AMPLIFIERS
https://vtechworks.lib.vt.edu/bitstream/handle/10919/71340/LD5655.V855_1959.G673.pdf
6 I. IIfrRODlJCTIOI Definitions and Hlsto;rz The magnetic amplifier.is a device using saturable reactors either a.lone or in combination with other circuit elements to secure anrplifioation.1 The be.sic element of the magnetic amplifier, the saturable reactor, is an elec~romagnetic device employing one or more nonlinear magnetic cores.
Magnetic Audio Frequency Fundamentals
https://www.aes.org/aeshc/pdf/how.the.aes.began/vincent_magnetic-audio-fundamentals.pdf
impedance in a magnetic amplifier. Since this curve almost duplicates that of cer- tain type tubes, operating characteristics of both can be plotted on the same curve. For a fair comparison the "plate" supply of both amplifiers must be a.c., for a magnetic amplifier will not control d.c. If this amplifier is to be used to amplify audio ...
Make Your First Serious Amplifier : 10 Steps (with ...
https://www.instructables.com/Make-your-first-Serious-Amplifier/
Solder the 100uF cap's minus side to pin 8 and the 10k resistor (picture 5). Try to make "solder-time" as short as possible. By heating up the resistor it tends to get loose from pin 8. Connect pin 7 to the plus-side of the 100uF cap with a piece of bare solid wire (I used jumper wire from a breadboard) (picture 6).
Magnetic amplifier | Electronics Forum (Circuits, Projects ...
https://www.electro-tech-online.com/threads/magnetic-amplifier.38844/
I saw a schematic of a magnetic amplifier once at the University of New Orleans Physics Lab. It was used to amplify the millivolt output of our laboratory gaussmeter up to a volt or so to control the current in the big magnet. It's gain was set by a feedback resistor just like a real op-amp. The circuit was powered by an audio frequency AC source.
AUDIO TRANSFORMER DESIGN FOR TUBE AMPLIFIER WITH …
http://www.standardsuniversity.org/wp-content/uploads/audio_transformer_design_tube_amplifier_pichkalyov_final_paper.pdf
Audio transformer is the primary part of a tube amplifier which generates an electromagnetic field. The objective of this project is to develop an output transformer for single-ended tube amplifiers with reduced magnetic fields while preserving an adequate sound quality. IEEE C95.6-2002, 4210-2003 National
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