Source for HQ fixed 15V regs anyone? - diyAudio
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Old 14th March 2003, 10:29 PM   #1
Lenin is offline Lenin  United Kingdom
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Unhappy Source for HQ fixed 15V regs anyone?

Upgrading a pre-amp. Unfortunately, the world of fixed regs seems to stop at 12V.

Arrrrgggghhhh!
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Old 14th March 2003, 10:36 PM   #2
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donīt know whats HQ, but here http://www.reichelt.de/ type "7815" in the white window that says "Artikelsuche" and go.


there is 18,20,24 V in + and - also.
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Old 14th March 2003, 10:46 PM   #3
Lenin is offline Lenin  United Kingdom
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Unhappy Thanks - but no cigar...

Thanks Till,

but I'm actually trying to source something better than the 78XX series.

I guess a fixed 15V version of LT's 3-pin regs (or any low dropout voltage regs for that matter) would be right on the money.
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Old 14th March 2003, 11:07 PM   #4
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Presuming HQ means High Quality, try the 78T15 (eg. motorola part MC78T15CT). Much better sonics than a 7815, it's also 4 time the price.
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Old 14th March 2003, 11:39 PM   #5
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What about LM317/337 ? If you want low drop LM1086-ADJ is OK. Avoid buying the fixed versions: they are twice as expensive or even more.
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Old 15th March 2003, 07:47 AM   #6
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Question Better Regulator

Quote:
Originally posted by scraggles
Presuming HQ means High Quality, try the 78T15 (eg. motorola part MC78T15CT). Much better sonics than a 7815, it's also 4 time the price.
Hi scraggles,
I find your post very interesting!
Any idea why the 3A regulator sounds better than the regular 1.5A?

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Old 15th March 2003, 10:26 PM   #7
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Hmm, I couldn't even hesitate a guess as to why. My statement is based on some subjective tests we conducted last time I built some equipment over 10 years ago.
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Old 16th March 2003, 03:58 PM   #8
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Cool MC78T15CT

Hi scraggles,
The datsheet indicates a 80 dB ripple rejection ans less overshoot on line and load transients. In fact the data are just as good as a LM317 with bypassed adjustment pin.
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Old 16th March 2003, 05:30 PM   #9
Lenin is offline Lenin  United Kingdom
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Smile Mission accomplished - thankyou

Scraggles, Elso - thanks very much.

Parts ordered

Lenin
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Old 16th March 2003, 06:31 PM   #10
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Default How about the negative side?

Since it is only available up to 1A, thus not matching the recommend piece. IF one has to match -/+, is there another suggestion that you have compared?
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