CLCLC vs FCUPS

General discussion about Hi-Fi, vacuum tubes and DIY Kits.

CLCLC vs FCUPS

Postby brian » Thu Dec 04, 2008 10:00 am

Noise:
the FCUPS (Film Capacitor Universal Power Supply) gives 115 to 120db of 100hz ripple rejection.
To get that with traditional CLC networks would need a 20uf/20h/220uf/20h/220uf network.

Cost?
CLCLC: >500USD just for the parts for a 100ma rated B+ rail.
The FCUPS? $200USD

Performance:
Of course all that CLCLC capacitance is going to make for a very slow and soggy sound since it is inductance that gives speed and attack. The above supply only has 40h (practical limit for size that would fit into an already huge and heavy chassis (think Smörgåsbord rather than breadboard).
The FCUPS? Equivalent 500h! with a 60 x 60 220mm footprint (ah, back to breadboard). And sound that has attack, transparency and bass that goes WAAAAY down low.

Features:
If we need a bias voltage supply add to the CLCLC shopping cart again.
FCUPS? on board configurable -70 or -140v.

Another little detail -- the rectifier.
For the CLCLC -- back to the shopping cart for more parts.
FCUPS: on board Schottky diode bridge. Of course the bridge can be bypassed and a tube rectifier used.

Portability:
CLCLC: major 5 to 10kg adder to amplifier weight and don't even think about trying it in different applications.
FCUPS? 350g. Easy to remove and install as all screw connectors. Oh yeah! This can be part of the family estate.

Did I mention the price? $200USD. For an all film cap 500h, with bias a rectification on board supply.
What a package!
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brian
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