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| Trash or treasure. What are these diy bits of test gear? |
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| RichardM:
A general question, when do you need to use a 1:1 audio transformer ? i.e. what applications ? All of these transformers, including the Trimax, appear to be 1:1 transformers. Cheers |
| Kleinstein:
The polystyrene capacitors may be worth keeping, though at least the smaller ones are usually not that expensive. The start to become hard to get though. Most of the properties (especially the leakage current) are good, but they are sensitive to chemicals (even alcohol may damage them) and heat. In many application one can now use C0G MLCCs instead. There main use now is for very low leakage, e.g. in electrometers, pA meters. Audio transformers can be usefull to avoid hum from ground loops, e.g. when combining many parts that are grounded. |
| Grandchuck:
--- Quote from: RichardM on November 07, 2023, 11:56:17 am ---A general question, when do you need to use a 1:1 audio transformer ? i.e. what applications ? All of these transformers, including the Trimax, appear to be 1:1 transformers. Cheers --- End quote --- One use is testing radio station audio performance. The audio signal generator is connected to the console using a 1:1 transformer. This keeps power line hum (caused by ground loops) and other artifacts from degrading the signal to noise ratio. Many years ago I used such a transformer in a proof of performance verification for a commercial FM broadcast station. |
| themadhippy:
--- Quote ---when do you need to use a 1:1 audio transformer ? i.e. what applications ? --- End quote --- Not so common these days with the introduction of digital system,but back in the days of anologe pa systems they were often found splitting the feeds from stage to the monitor desk,foh desk,recording truck,tv feed etc. |
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