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In Reply to: Tim and Tre - posted by Triode_Kingdom on September 15, 2021 at 19:55:36:
On loss in output transformers. Let's take a look at Monolith MagneticsThe S9 (Rp=3300 Ohm) has 0.27dB loss and thus an efficiency of 94% (good)
The S11 (rp=5000 Ohms) has 0.50dB loss and an efficiency of 89% (not special)
That is copper loss. The core also has losses and that depends on signal level, frequency, core quality and even winding technique.
Those losses can be measured but are almost never published.The S11 has in my opinion-if we are looking for a high quality audio transformer-a bit high copper losses. Both transformers suffer from low inductance. This is good for lower copper losses, but less good for low frequency distortion.
I have noticed that MM's datasheet is not very good, in my opinion they are not quite right. I infer this from the specified inductance and the low frequency response they specify. Something is not right there. There are definitely errors in there. (small)
Doesn't take away from the fact that they make the effort to publish data and while I think Tango is lord and master for audio transformers and datasheets they do a pretty good job. Lundahl doesn't do a good job and a well-known foodoo brand like Tribute is just bad.
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- RE: Tim and Tre - - kobasa@xs4all.nl 09/16/2113:14:26 09/16/21 (0)
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