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1. #FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL HOW TO#
2. #FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL MOD#
3. #FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL UPDATE#
4. #FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL DRIVER#

The Bias control also adds dynamics and allows you to custom match your Tube Driver for any particular pickup/amp combination. Just go up or down a few clicks and he nails what he wants. Eric Johnson used to spend a lot of time looking for perfect tubes to use in his standard Tube Drivers, but now he can just set the bias easily with the stock tube. "The Bias control is very helpful as it adjusts the amount of current applied to the cathode of the tube.

#FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL MOD#

So, what am I planning to do:ġ - Make this thing True Bypass the bypass switching currently employed by Overlord is terrible, a switch to true bypass will greatly improve the bypassed tone.Ģ - Incorporate the "Bias" mod, here's a description of what the bias mod actually does from the B K Butler website:

Now what I want to do is combine the best parts of each of these variations into one and modify my Overlord into the ultimate tube overdrive pedal. I took a look at various schematics with a view to modifying the Overlord to full-fill it's true potential:Īnd the newly updated Tube Driver itself (with the "Bias" mod):Īnd another version by Bajaman - The Real Tube Overdrive with a regulated power supply and simplified tone control: That said, here are links to the measuurements we have.Īluminum front triangle, bolted on chromoly rear.Now there are plenty of variations on this design from B K Butler himself, Chandler and Tube Works among others. There is no guaranteee that it will be correct just because the bicycle make and model match those in the table. But also, a measurement is better than looking up a measurement of a different seatpost or seat tube. As the saying goes, a comparison is better than a measurement. I (John Allen) have dropped this task, for two reasons: it is tiresome, and measuring is far more reliable. Sheldon collected seatpost size dimensions to place in the table below. see our article about trick measurement techniques. A large adjustable wrench, set to just slip over a seatpost, is fine that purpose. You don't even need a caliper to compare seatposts. You also could measure the diameter of the seatpost and of the hole in the seat tube using a dial indicator or vernier caliper. The diameter is stamped on many seatposts (usually on the part that is fits inside the bicycle's seat tube and gets scratched up and covered with grease, *sigh*). AccuracyĪlternately, you could check the diameter of a seatpost that fits. The seatpost clamps of metal frames easily damage carbon-fiber seatposts. Metal should be greased, but carbon fiber should not be. Using a carbon-fiber seatpost in a metal frame, or vice versa, invites problems. Common diameters arey 30.9mm and 31.6mm.ĭiameter is not the only factor affecting compatibility. Since high-quality seatposts are widely available in 27.2, most high-end aluminum and carbon-fiber road bicycles also use 27.2.Ī recent trend to oversized tubing has resulted in the introduction of oversized seatposts (anything over 27.4 would be considered oversized.) These are more commonly seen on mountain bikes, where the longer seatposts can use the extra strength. This has resulted in a de facto standard of 27.2mm for high-quality bicycles that have 1 1/8" O.D. High-performance bicycles are made of thinner-walled tubing, so the hole will be larger if the outside diameter is kept the same.Īs a result, a larger seatpost size is often a sign of a higher-quality bicycle. Standard outside diameter accommodates standard lugs and clamp-on parts such as front derailers, pulleys and other cable guides, pump pegs, etc. Old American style, commonly used on BMX bicycles and other bicycles that use one-piece-cranks, uses a 1" seat tube. Frames made to British or Italian standards will typically have 1 1/8" (28.6 mm) seat tubes. Most steel bicycle frames have tubing of standard outside diameter. On a related topic, we have an article (by Sheldon Brown, updated by John Allen) on Stuck Seatposts which may be of use to you. It will be near the minimum-insertion mark, not visible when the seatpost is installed on a bicycle. The size is usually stamped on the seatpost near the bottom.

#FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL HOW TO#

So this article also describes how to take measurements, even if you don't have the "right" tools. We recommend measuring, both because it is more reliable and because we can't possibly have information on every make and model of bicycle.

#FAVORITE THIS POST BK BUTLER TUBE WORKS REAL TUBE PEDAL UPDATE#

John Allen and Harriet Fell have received more reader-provided information but we will no longer update this file, except to correct errors. Sheldon Brown started compiling a list, and realizing that it was too large a project for one person, he solicited information from readers. Tweet Follow page describes how to measure bicycle seat tubes and seatposts, and lists various bicycles, and the seatpost diameters that fit them.