#Bk butler tube driver website series

#Bk butler tube driver website series

(At 15V the heater life would be similar to a light-bulb, a thousand hours.) The heater is just a hot resistor, and the easiest way to waste-off some voltage is with a series resistor. At 14V or more I would consider reducing the voltage. 13V or 13.5V is not worth fretting about. Since you won't have a custom exact-right transformer (values of 200mA, 500mA, and 660mA are mentioned here), the transformer is UNDER-loaded and you wind up a little above 12.6VAC at actual load. Actually a '12V' trannie is wound for 14V-16V no-load, and sags near 12V at maximum load. > the heater supply does pass through a 10 ohm (power not given) resistor. Notice that with over-kill, a heavier guitar or a mistake in computing the opamp or tube load does not mean a bent hook or a burnt transformer. Yes, but, it's like: you need an 1/8-inch hook to hang your guitar, but there's a 1/4-inch hook in your spare-screws bin, so that's what you use. > Probably major overkill for the job at hand. The 500mA may be easier to find and/or cheaper. The 12V 200mA part is in excess of the required 172mA and will be fine. You can hardly buy a transformer this small. Total AC current is 150mA + 22mA or 172mA. Then multiply by 1.6-1.8 to account for AC-DC conversion stress. To get back to the transformer AC rating: first double this to account for doubler-action, 13mA. Do we care? Let's see how bad things look.ДЈ6V (total DC suply: 5mA opamps, 1.5mA tubes, 6.5mA total. Then the maximum current is 36V/47K or 0.75mA. Exact analysis is hit-or-miss, but worst-case analysis is easy. Also one sheet shows cathode bias (common to both cascaded tubes, an unstable affair), the other is zero bias one shows 68K plate resistors and the other shows 47K. The datasheet is NO help because we are so far away from 'typical' voltages. The DC supply is 12V AC doubled to roughly +/-18V DC, 36V total. However, I Any questions please don't hesitate to ask - collection available from East Sheen (Richmond area), South West London if one prefers.Heater is nominal 12.6V 0.15A, and may be AC. You will not get a lot of battery life out of these so PSU is probably advisable anyway. This is well worn (read 'loved'?) Doesn't seem to work with Battery (probably battery clip) but I never needed to fix it as it works perfectly when using a power supply. Van Halen signature version with 'Script' and 'Block' settings. * SOLD* Big box reissue with original box. Only selling because I own a Strymon Mobius and a Boss CE-2 so well stocked in chorus land! A fantastic chorus pedal that can do a pretty darn good rotary speaker impression at high settings. *SOLD* Original japanese black box model. Guitar Man Volume Pedal - ВЈ10 ВЈ5 *SOLD* (including the cheapest shipping I can find.) Very cheap. Screamer type OD but without that annoying 'Bass-cut' quality the Ibanez *SOLD* Original version with Dinosaur Logo. These haven't been made for years and their availability is dwindling. These are the tubes that BK Butler put in pedals for players like Eric Johnson and David GIlmour. I bought this after I had owned the Tube Driver for a while, it makes a tremendous difference and really is the perfect tube for a 'Starved Plate' design overdrive pedal. Comes with the Electro Harmonix tube that was originally included.Д®i 'Yugo' Tube (12ax7) - ВЈ50 ВЈ40 shipped.

Has had UK plug fitted (BK Butler only provides them with US plugs regardless of whether they are 110 or 230 models). A few pedals for sale! Prices assume Paypal Gift.Д«K Butler Tube Driver - ВЈ210 ВЈ200 shipped.