OK, I will stick with Max's design, and study common cathode stages.
My transformers should arrive in about four weeks...
I will let you all know how it works!
My transformers should arrive in about four weeks...
I will let you all know how it works!
@Greg Hyatt - please be aware of the risks of working on non-isolated power supplies and what the Rules say:“Working on live and non isolated power supplies as well as high voltage equipment carries risk. Much of todays equipment uses power supplies derived from circuitry that is both live at all times and that also has no isolation from the incoming mains supply. This can be lethal to those unfamiliar with this mode of operation. Even probing the circuitry with mains powered test equipment carries an immediate and lethal risk. It is therefore the responsibility of the person working on such equipment to ensure that they are fully conversant with safe working practices which include (but are not limited to) powering both the item being worked on and the test equipment from an isolated supply. Tube/valve circuitry also poses a lethal shock hazard due to the high voltages typically encountered. Again, the person working on such projects should be conversant with safe and good working practices.“
To add to the above, the power supply that you proposed would be lethal.
A variac provides no isolation whatsoever from the incoming mains supply, and in fact with the two earth symbols in place would cause a partial short across the incoming supply.
With no earth connection the whole 'output' side of the circuit is floating at the mains voltage.
Always use a proper transformer to provide a safety barrier, whether it be a conventional transformer or a properly designed SMPS.
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