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OTL, Output Transformerless Amplifier User Group.

OTL preamp

Most preamps are OTL in that they are Output TransformerLess.

IOW, some preamps do indeed have output transformers.

OTOH, a preamp that does not also have an output coupling cap is a bit different. Since our output circuit for our amps allowed for a direct-coupled circuit, we applied the same circuit to the output of our preamps, so no output transformer and no output coupling cap.


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  • OTL preamp - Ralph 09:28:40 06/22/17 (0)

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