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Robert Gribnau · 25th Nov 2022, 7:08 pm

Good point. But that drawback can be addressed by using a LC or RC filter between the power stage and the rest of the amplifier.

In a push-pull amplifier I built, with 2 x EL34 in ultra-lineair configuration, and with cathode feedback, I used power supplies (one per channel) with 5 uF-2 H/20 Ohm-50uf-2 H/20 Ohm-200 uF per channel. An extra RC filter separates the power stage from the preceding stage. It sounds very good to me.

25th Nov 2022, 7:08 pm	#12
Robert Gribnau Heptode Join Date: May 2017 Location: Konongo, Ghana Posts: 514	Re: Output transformer HT connection. Good point. But that drawback can be addressed by using a LC or RC filter between the power stage and the rest of the amplifier. In a push-pull amplifier I built, with 2 x EL34 in ultra-lineair configuration, and with cathode feedback, I used power supplies (one per channel) with 5 uF-2 H/20 Ohm-50uf-2 H/20 Ohm-200 uF per channel. An extra RC filter separates the power stage from the preceding stage. It sounds very good to me. Attached Thumbnails __________________ Robert Last edited by Robert Gribnau; 25th Nov 2022 at 7:29 pm. Reason: Addition