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Nostalgia Air: Testing Transformers
http://www.nostalgiaair.org/references/articles/singles/xfrmr01.htm#:~:text=The%20type%20of%20test%20needed%20for%20the%20audio,ohms.%20High%20resistance%20%28megohms%29%20is%20a%20%22fail%22%20condition.
How to test an audio transformer | All About Circuits
https://forum.allaboutcircuits.com/threads/how-to-test-an-audio-transformer.168870/
If you have the ability you can apply an AC voltage to the primary and measure the AC voltage on the secondary side. A good place to start is get the turns ratio so apply a low AC voltage like maybe 3 volts to the primary and measure the secondary. If I apply 3 volts and get out 1 volt I have a 3:1 turns ratio.
audio lecture 21, how to test audio output transformers ...
https://www.youtube.com/watch?v=mcxc_CgSrds
general purpose multimeters are useful to measuer DC R however they are not enough for OPT test. withstanding voltage tester and precision LCR meter are used...
Testing Audio & Telecom Transformers
https://www.voltech.com/media/emnpb4ja/testing-audio-telecom-transformers.pdf
is placed across the transformer output and two source resistors (RS) are . placed at the transformer inputs. First the test voltage Vin is applied as a common mode signal and the output voltage Vout1 is recorded. The same Vin is then applied as a normal input voltage and the output Vout2 is recorded.
How to safely test the Output Transformer on tube radio …
https://www.youtube.com/watch?v=L3XV8InDe0g
The Output Transformer on a tube radio or amp is a crucial part of the design of the circuit, so a restoration's viability may depend on whether it is functi...
Testing Output Transformers
http://www.geofex.com/ampdbug/outtrans.htm
Simple Tests Unplug the amp and drain the capacitors before you start. the transformer from the amplifier before you start. Remove the output and rectifier tubes. Identify which wires are which by circuit connection. very rarely single ended with ultra linear tap), or five (push pull
How can you test an output transformer? - Amps - …
https://www.harmonycentral.com/forums/topic/1497294-how-can-you-test-an-output-transformer/
TESTING OUTPUT TRANSFORMERS: It is not necessary to unwire the output transformer for this test, just pull the output tubes. Here's what you do; Take your little 6.3 V filament test transformer, and clip one alligator clip to the output transformer secondary tap. This can be the 4, 8, or 16 ohm tap. It doesn't make any difference which one you use. Next, you'll …
How to test a small audio transformer to find out the ...
https://www.eevblog.com/forum/beginners/how-to-test-a-small-audio-transformer-to-find-out-the-specs/
Feed the signal from an audio signal generator into one side of the transformer and measure the output on the other winding using an oscilloscope or (if you have one) an audio millivoltmeter. I just tried this on a transformer pulled from a …
Audio Transformers
https://www.jensen-transformers.com/wp-content/uploads/2014/08/Audio-Transformers-Chapter.pdf
1 Audio Transformer Basics Since the birth of audio electronics, the audio transformer has played an important role. When compared to modern miniaturized electronics, a transformer seems large, heavy, and expensive but it continues to …
Antique Radio Forums • View topic - testing output transformer
https://www.antiqueradios.com/forums/viewtopic.php?t=168025
If you measure a voltage ratio of 3.15:2.3 then the implied impedance ratio is (3.15/2.3)^2 = 1.88:1 (The impedance ratio is the square of the voltage ratio). If the output impedance is known to be 4 ohms then the input impedance would have to be 1.88*4 = 7.52 ohms to get that voltage. An output transformer with that primary impedance is very unlikely.
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