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Old 31st July 2012, 11:15 AM   #6461
FdW is offline FdW  Netherlands
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Also having a load of BF245C will they be acceptable to sub J310 as the error amp's active load in the reg and in other places in the phono maybe? They would need some Irish dancer feet bend but they pay in noise figure.
Yes that will works just set the resistor for 1mA (about 1K from the datasheet ID 1mA at VGS 1Volt). This is not very critical

Last edited by FdW; 31st July 2012 at 11:19 AM.
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Old 31st July 2012, 11:17 AM   #6462
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The CCS uses one Led as an reference and the CVS that feeds the CCS uses two Led's as an reference, that makes that optimum regulation is lost when the CVS looses it's headroom. If you give the CVS 2Vols headroom, then the minimum DC-in would be "DC-out + (2 * Led) + 2Volts headroom" = "18 + (2 * 1.7) + 2" = 23.2 to this we have to add the 'ripple-floor' of the raw-input-voltage (lets say 1Volt) and we get at "23.2 + 1" = 24.2Volts minimum input voltage (when using 1.7Volts drop on the Led).
Here is the schema including some of my notes.
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Old 31st July 2012, 11:25 AM   #6463
Salas is offline Salas  Greece
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Some may be tempted to pre-reg this so to be care free of mains tolerance without secondary over-spec and extra sink heat. But I would be cautious of unstable interaction with the CVS. Hiss would be the clue if not having a scope.
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Old 31st July 2012, 11:33 AM   #6464
FdW is offline FdW  Netherlands
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Originally Posted by Salas View Post
Some may be tempted to pre-reg this so to be care free of mains tolerance without secondary over-spec and extra sink heat. But I would be cautious of unstable interaction with the CVS. Hiss would be the clue if not having a scope.
You are right.

The PSU is designed to be connected to a filtered (using capacitors and possibly inductors (impulse noise canceling)) (this can be 2 banks of capacitors separated by a low value resistor (say 2.2Ohms) and connected to a bridge-rectifier.

Additional signal (power) condition is not needed (and or wanted).

This regulator has never shown any instability in any of the beta builds (and other).

See also Mpp

Last edited by FdW; 31st July 2012 at 11:37 AM.
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Old 31st July 2012, 11:38 AM   #6465
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So I think, this> Unisieb
will be sufficient ?
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Old 31st July 2012, 11:42 AM   #6466
FdW is offline FdW  Netherlands
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So I think, this> Unisieb
will be sufficient ?
Yes that 'platINA' would work (I do not know why the site spells it like that, but I like it ).

This Balanced input all DC coupled RIAA preamp would work also (the raw PSU board).

Last edited by FdW; 31st July 2012 at 11:46 AM.
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Old 31st July 2012, 11:43 AM   #6467
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Such "Thingie" is now feeding my PlatIna...
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Old 31st July 2012, 05:28 PM   #6468
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PCB/Heatsink orders at 89
11 short of 100 (I can count )
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Old 31st July 2012, 06:18 PM   #6469
brianco is offline brianco  Ireland
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..................
11 short of 100 (I can count )
.......and subtract!!
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Old 31st July 2012, 06:28 PM   #6470
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.......and subtract!!
What's that? subtract? it's realy confusing and negative also.
Subtract Synonyms, Subtract Antonyms | Thesaurus.com

89 +1 = 90 +1 = 91 +1 = 92 +1 = 93 +1 = 94 +1 = 95 +1 = 96 +1 = 97 +1 = 98 +1 = 99 +1 = 100, now count the 1's and you find that the answer is 11
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