John Curl's Blowtorch preamplifier part II - Page 6 - diyAudio
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Old 1st July 2009, 03:17 PM   #51
Bonsai is offline Bonsai  Taiwan
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Avoid M-Audio

I recognize this statement. Absolute crap for measurements.
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Old 1st July 2009, 03:58 PM   #52
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Okay, message understood. Back to Blowtorch preamp - circuitry, parts and finish.
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Old 1st July 2009, 04:55 PM   #53
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HI

If I'm not wrong ,not too light on the Blowtorch psu....
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Old 1st July 2009, 05:11 PM   #54
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The power supply is the biggest part of the active circuitry for the BLOWTORCH.
It is composed of 3 passive stages, then 3 active stages of regulation and noise reduction, on each channel and each supply voltage, before reaching the actual gain stage that amplifies the music. The gain stage is about 2 square inches (rough estimate) for each channel. The rest is servos, and power supply.
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Old 1st July 2009, 05:19 PM   #55
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Quote:
Originally posted by john curl
The power supply is the biggest part of the active circuitry for the BLOWTORCH.
It is composed of 3 passive stages, then 3 active stages of regulation and noise reduction, on each channel and each supply voltage, before reaching the actual gain stage that amplifies the music. The gain stage is about 2 square inches (rough estimate) for each channel. The rest is servos, and power supply.

I like that concept. Always reminds me of a super sportsman. He is the one to perform, but he has a coach, a hapnic advisor, a medical assistent, a stress manager, whatever. The amplifing stage is the supersportsman. The rest is there to make him perform his best.

Are these regulator stages series or shunt?


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Old 1st July 2009, 05:22 PM   #56
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I would guess series - shunt - passive (aka cap multiplier)
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Old 1st July 2009, 05:50 PM   #57
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my Erno phono have discrete series reg, can be usefull add a shunt before ?
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Old 1st July 2009, 05:59 PM   #58
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Quote:
Originally posted by nicoch46
HI
my Erno phono have discrete series reg, can be usefull add a shunt before ?

No, after! The great advantage of a shunt is that it lets you localize the return current, rather than running it back through the ground wire to the supply input, with the risk that it contaminates the signal ground.

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Old 1st July 2009, 06:03 PM   #59
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thanks Jan

I see a lot to learning on Blowtorch psu
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Old 1st July 2009, 06:35 PM   #60
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Quote:
Originally posted by nicoch46
thanks Jan

I see a lot to learning on Blowtorch psu

Of course I wasn't talking on the Blowtorch PSU. I have no idea how that is configured (well, a tiny bit from John's post).

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