Everything You Would Ever Want to Know About a 1922 Chelsea Model 50 Audio Transformer
HTML-код
- Опубликовано: 27 авг 2024
- This video delves into the inner workings of the Chelsea Model 50 and 51 transformer. We will discuss its history, its relevance, and we will rip one apart to discover its inner secrets. Of course, no deconstruction and replacement would be complete without breaking out the test equipment and doing some impedance and gain testing. We follow that by coming up with a suitable replacement core for those that haven't survived the last 100 years, and then making it match the period aesthetics. We will wrap up by constructing the 4 most common configurations.
That’s a lot of information to take in. Opens up a lot more questions for me. But my head hurts right now in a good way. Many thanks for this video
Thank you
That was a great job! I’m sure that with your skills in the future you may want to try to wind a transformer by yourself. Modern wire enamel avoid the use of layers insulation (you may only do between primary and secondary) making the winding process a lot easier. It’s a really satisfying task and you can match the original ratio, as well as the original shape. Again, excellent solution for those antique radios. Thanks for sharing this video.
I will at some point. I didn't really want to have to do it with this many transformers though.
The analysis of your transformer is missing the DC current in the primary and also the secondary is never load with any resistance like you showing us but the high frequency is limited by the resistance and leakage inductance of the transformer loaded by the capacity of the following tube grid plus Miller effect. Not simple.
Resistance coupling is incorrect and did not exist in any radio...
You might want to look at some of Lawrence Cockaday's work before making that statement. While "true" resistance coupling may not exist, the term was used in circuits where resistors played a primary role in what we refer to today as a form of RC coupling.