#1 Question re grounding
Posted: Tue Aug 27, 2019 7:15 pm
Hi all
My amp is 3 stage, each is valve rectifier into LCLC. Transformer coupling between stages. Each stage uses entirely separate mains transformer secondaries, and each stage is grounded to star earth exactly once, at the bottom of the cathode resistor. Each circuit is arranged with chokes in both + and - power connections.
I now want to experiment with things, including driving all 3 stages from s single mains transformer winding. Each stage would retain separate rectifiers, LCLC etc.
Am I right to think that I should still only provide one 0v reference (star ground) ? If I continue to ground each stage at the cathode resistor, each will be at different voltages with respect to the transformer so that can't work.
Someone set my thinking straight, or tell me I'm right.
My amp is 3 stage, each is valve rectifier into LCLC. Transformer coupling between stages. Each stage uses entirely separate mains transformer secondaries, and each stage is grounded to star earth exactly once, at the bottom of the cathode resistor. Each circuit is arranged with chokes in both + and - power connections.
I now want to experiment with things, including driving all 3 stages from s single mains transformer winding. Each stage would retain separate rectifiers, LCLC etc.
Am I right to think that I should still only provide one 0v reference (star ground) ? If I continue to ground each stage at the cathode resistor, each will be at different voltages with respect to the transformer so that can't work.
Someone set my thinking straight, or tell me I'm right.