- #BK BUTLER TUBE WORKS 2 PREAMP HOW TO#
- #BK BUTLER TUBE WORKS 2 PREAMP DRIVER#
- #BK BUTLER TUBE WORKS 2 PREAMP FULL#
- #BK BUTLER TUBE WORKS 2 PREAMP PROFESSIONAL#
Unable to wrap my mind around this outrageously radical TDB factor notion, I asked the designer to shed some light on today's review unit and, by extension, on the super amp depicted above.
#BK BUTLER TUBE WORKS 2 PREAMP DRIVER#
His Tube Driver Blue has also found its way into upscale car audio.
#BK BUTLER TUBE WORKS 2 PREAMP PROFESSIONAL#
In the professional tube audio arena for more than 25 years, BK counts among his clients players and groups like Eric Clapton, ZZTop's Billy Gibbons, Pink Floyd, Elton John, Paul McCartney and 100s of others.
#BK BUTLER TUBE WORKS 2 PREAMP FULL#
It's one of low-voltage operation that employs its tubes at less than 5% of their rated values and carries a full US patent as though every conceivable scheme of wiring and loading a tube hadn't already been thought of and patented decades ago. Today's bridgeable-to-800 watts behemoth with its twin 6SL7GC dual triodes and 2KW power toroid is apparently based on a very similar concept. After all, what do you make of the apparently single-ended 300B Class A monoblock code-named A100 below that delivers 100/200w into 8/4 ohms, packs 2,000,000uf of capacitance like a fistful of dynamite and accordingly can drive pretty much any load under your moon?įirst spotted in my HE2003 San Francisco coverage driving the full-range 4-way Cabasse Karas towers with their tri-concentric cyclops eyes, I only absorbed at the time that the lone 300B triode was not just a predriver but somehow DC-coupled directly to the output devices to mix transistor muscle and valve velvet in a novel, zero global NFB hybrid architecture. Does that transform the BK in designer Butler's initials into Blue King? These questions are all best answered by the butler who would be master. Tube Driver Blue? Now there's a sporting moniker that just so happens to be the correct one. Total Dominance Bully? Not bad - 43 pounds of boffo weight and build quality agree with you but the presence of those eerily blue-illuminated valves might send you down the wrong alley despite that brutish 250-watt power rating. Take TDB: Testosterone Depleted Bore? One look at the amp above quickly disabuses the poet in you of any wimpy notions. Just think of all the possible ways to distort 'em. Room size: 30' w x 18' d x 10' h in long-wall setup in one half, with open adjoining living room for a total of ca.1000 squ.ft floor plan and significant 'active' cubic air volume of essentially the entire (small) houseĪcronyms are great fun. Sundry accessories: GPA Formula Carbon/Kevlar shelf for transport GPA Apex footers underneath stand and speakers Walker Audio SST on all connections Walker Audio Vivid CD cleaner Furutech RD-2 CD demagnetizer WorldPower cryo'd Hubbell wall sockets Musse Audio resonance dampers on DUO subs Mapleshade 4" solid maple platform under BPT conditioner Powerline conditioning: BPT BP-3.5 Signature for source components Walker Audio Velocitor Stands: 2 x Grand Prix Audio Monaco four-tier Speakers: Avantgarde Duo Gallo Acoustics Reference 3Ĭables: Stealth Audio Varidig S/PDIF, Stealth Audio Indra (x2), Crystal Cable Reference speaker cable and power cords ZCable Hurricane power cords on both conditioners Preamp/Integrated: Bel Canto PRe2 Wyetech Labs Pearl Left the heater resistor off the vero board, as was previously suggested, and set it up to receive 12VAC external power (no room for a transformer and power socket obviously).Source: Zanden Audio Model 5000 MkIII DAC Accustic Arts Drive-1 Audio Aero Prima Update (): Here’s my own build, in a slightly taller 1590BB enclosure I got from smallbear (I think they call it the 125BB) which gave just enough room for the tube. Run the 10 ohm resistor (R16) from the 12VAC source (probably a trafo in most cases) straight to the heaters. There’s also been reports of this being quite noisy, and I’m happy to pass on coi2001’s suggested fix leave the heater resistor off the board since that’s the main noise source. Update (): Thanks to several of you for verifying this one!
#BK BUTLER TUBE WORKS 2 PREAMP HOW TO#
Don’t do it if you’re not sure how to do it safely. Use a small mains transformer or a good 12v AC power supply, and be careful when playing with mains power. I really should draw a proper diagram for this.ĭo note that this effect requires 12v AC power and not DC like most other effects. The wiring explanation is a bit convoluted as well, sorry. The effect uses a preamp tube of type ECC83 / 12AX7, and I guess you would need some ventilation in your enclosure. I left as much space as I felt was necessary for the large supply caps, but I’m afraid it could still end up being a bit crowded. Here’s an overdrive pedal that uses an actual preamp tube, which is quite exciting.īased on Bajaman’s schematic I created a layout with wiring for the tube pins (since I can’t imagine a tube socket fitting neatly on a piece of vero board).
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