Hi,
I am working on an input stage for a power amp with UCD 400 modules. The input is transformer based with two 6h30 tubes. The circuit runs on 90 Volts. All is designed and transformers are wound by Pieter Treurniet of Tribute audio.
I would like to have a dual mono power supply with one or two transformers. But I also would like to keep things compact. Tribute suggested tube rectifiers with chokes. But my guess is that is going to be big.
So my guess is diode rectified with some kind of active regulation and as compact as possible. I will try to keep the parts quality as high as possible so good diodes and good caps.
I am working on an input stage for a power amp with UCD 400 modules. The input is transformer based with two 6h30 tubes. The circuit runs on 90 Volts. All is designed and transformers are wound by Pieter Treurniet of Tribute audio.
I would like to have a dual mono power supply with one or two transformers. But I also would like to keep things compact. Tribute suggested tube rectifiers with chokes. But my guess is that is going to be big.
So my guess is diode rectified with some kind of active regulation and as compact as possible. I will try to keep the parts quality as high as possible so good diodes and good caps.
That is indeed compact. I had not yet thought of this (was thinking of active regulation). Should I increase the resistance or decrease the resistor value towards the amplifier? I think it is best to increase the capacitor values towards the amplifier?
Hello AmadeusMozart, I did some searching but have found no schematic. Do you now one or have one?
Linear regulator - Wikipedia, the free encyclopedia
Use abovementioned MOSFET in place of the bipolar transistor, R2 is the actual load (you don't put real resistor there), R1 should be somewhere in the range of 10K.
You can parallel zener diode with capacitor (a couple hundred uF) that will add "soft start" function to the regulator.
Put sufficient heatsink onto transistor tab and make sure it doesn't touch anything (tab is at drain potential -> very high voltage !!!).
Use abovementioned MOSFET in place of the bipolar transistor, R2 is the actual load (you don't put real resistor there), R1 should be somewhere in the range of 10K.
You can parallel zener diode with capacitor (a couple hundred uF) that will add "soft start" function to the regulator.
Put sufficient heatsink onto transistor tab and make sure it doesn't touch anything (tab is at drain potential -> very high voltage !!!).
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