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Single Ended Triodes (SETs), the ultimate tube lovers dream.

Regulated power supply?

61.18.170.143

Yes, direct coupled should be the way to go. Either stacked PS or like the DRD.

I heard different story, some says direct coupled need a stiff power supply with regulator. Even with 300B low powered, like the DRD, the B+ voltage will be the sum of driver + output. Now we are talking about 500+V. Regardless of big triode in DRD, almost impossible!! This is pretty tuffy to have a regulated power supply for DRD.

Another approach by talking to several tube builders and they prefer 50 or 70% more AC voltage on the secondary than the acutal B+ voltage and very low DCR secondary winding as well. Then drop the voltage from the first cap for actual needs feeding the low DCR & high inductance choke along with big bank of reservoir for proper filtering. This is the only way making a PS for a direct couple SE amplifier like the DRD. What do you think?


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