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Old 30th December 2007, 12:34 AM   #1
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Default Regulated Power Supply. Bipolar, JFET or MOS?

It is trendy in these days to build a high voltage and low current regulated power supply for tube amplifer with solid devices. Actually we have many options at hand when choosing the main regulating device, an IC, a bipolar, a JFET or a MOS. Let's factor IC out. If you want to build such a regulated power supply, which active device you prefer to use as the main regulating device, Bipolar, JFET or MOS?

Any hint will be highly appreciated.
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Old 30th December 2007, 12:46 AM   #2
Colt45 is offline Colt45  Serbia
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mosfet/lm317 combo.

they all do the same thing though, kind of personal preference. Being a pass element isn't really critical
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Old 30th December 2007, 01:09 AM   #3
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Default Please give some analysis.

Some convincing facts will be very useful for me to understand your preference.

For example, noise level, frequency response, and the switching speed (for transient response), etc. and any other parameters that you think to be very important for an optimal tube amplifier power supply.

Thanks.
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Old 30th December 2007, 06:10 AM   #4
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Does not matter. Whatever you use already, to reduce a nomenclature.

However, it may be an overkill to use Arsenide Gallium transistors, but the rest is cheap and good today, so many options are nearly equivalent.
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Old 30th December 2007, 08:30 AM   #5
Conta is offline Conta  Europe
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Quote:
Regulated Power Supply. Bipolar, JFET or MOS? Post #1
It is trendy in these days to build a high voltage and low current regulated power supply for tube amplifer with solid devices. Actually we have many options at hand when choosing the main regulating device, an IC, a bipolar, a JFET or a MOS. Let's factor IC out. If you want to build such a regulated power supply, which active device you prefer to use as the main regulating device, Bipolar, JFET or MOS?

Do you mean something like this? http://audio.ring.lt/pw36/36_e.html
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