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BC23 Phono Stage

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The BC23 is a totally solid-state design that does employ printed circuit boards. Once again, Blue Circle uses the components most appropriate for the given application. Solid-state is employed rather than tubes purely as a cost saving measure. To build a tube or hybrid phono stage at this price-point would require sonic compromises that Blue Circle was simply not prepared to make. Printed circuit boards are employed due to the very low level signals that a phono stage deals with. Noise considerations necessitate the use of PCBs.

Despite the use of PCBs, the BC23 is totally handcrafted. Like the BC21, it employs ultrafast diodes in the dual power supply, gold Cardas connectors, Cardas wire in the signal path and has a simple, yet effective PC board damping system. Poly caps are used throughout. It is totally custom loadable and has both MM and MC inputs. Like the BC21, the BC23 uses the traditional Blue Circle stainless steel faceplate.

**available in 100V, 110V, 120V, 200V, 220V, 230V, 240V.

Although the BC23 is no longer a production item we have decided to offer some significant upgrades to current owners. These improvements are the result of the developement of the new BC27 and BC27pi.

There 3 levels of upgrade available.

Level 1, (existing BC23 required)

*reusing existing chassis and improving the  power supply as per the following;

*increasing filtering capacitance by 200%

*Blue Circle polypropylene capacitor bypass

*HexFred rectifier

Level 2,  (existing BC23 required)

*the addition of an external power supply using the same chassis as the BCG3.1,  5.125" high, 5.25" wide, 14.5" deep

*dual transformers-one for each individual channel

*Blue Circle "blue puck cap" polypropylene capacitors as main capacitors, not just bypass

*HexFred rectifier

*on board filtering is 300% more than the original

*out board power supply is another 300% more than the original

*custom Blue Circle DC power cord between the power supply and the main amp

*with this power supply, the unit will play for over one minute without an ac power supply

Level 3 (existing BC23 required)

This upgrade reuses only the circuit board of the original BC23 everything else is new.

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The circuit baord is installed in the same stainless steel chassis as the AG3000, 17.5" wide, 3.25"high, 14.5"deep.

*Blue Circle film and foil capacitor as output coupling caps

*Blue Circle 1uF polypropylene capacitors bypass on the circuit board

*external power supply using the same as the BCG3.1, 5.125" high, 5.25" wide, 14.5" deep

*dual transformers- one for each individual channel

*Blue Circle "blue puck cap" polypropylene capacitors as main capacitors in on board  power , not just bypass

*HexFred rectifier

*out board power supply filering capacitance over 100,000uF

*on board power supply filtering capacitance over 830,000uF

*total capacitance is over 15 times the original filtering capacity

*custom Blue Circle DC power cord between the power supply and the main amp

*various options finishes for faceplate and cover on both the main amp and the power supply

BC23 Upgrades
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Contact:  bcircle@bluecircle.com  /  519-469-3215
   
Upgrades available to owners of a BC23 only. The BC23 is no longer a production item.