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OTL looks a bit different...

If I understand correctly the 'regenerator' is to generate balanced AC power.

I have recently purchased an isolation transformer (500VA nominal, 400VA continuous operation) based on a toroidal transformer that produces the AC that my audio components need to operate.

Balanced AC power has theoretically the advantage of canceling a worthwhile amount of noise on the power line.

However I found out a drawback when it is connected to an OTL.

After about 4 hours of continuos operation at high audio level the thermal protection of the unit turns on and it takes half an hour for the transformer core to get back to normal temperature.

OTLs need much higher AC line current peaks than similar conventional tube amplifiers of similar power output.

In other words, in order to power a 15 W OTL you may tentatively need a 1 KVA 'regenerator' to compensate for the copper losses of the internal transformer.




Omnes feriunt, ultima necat.

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