- #Bk butler tube driver 3 knob mod#
- #Bk butler tube driver 3 knob Pc#
- #Bk butler tube driver 3 knob series#
I got mine from a local electronic parts place (). I am certain that you can find many others. and others have them, for about $15.00.Į and both sell double sided board.
#Bk butler tube driver 3 knob Pc#
It is very compact, but it is a PC mount so you will need to deal with that. These are not toroidal, but their design (called semi-toroidal) is seeking the same end, eliminating the need for shielding.
#Bk butler tube driver 3 knob series#
As you can see you can wire the primary in series or parallel for 115 or 230 volt input and you can wire the outputs for two voltages. Here is a listing of some Hammond transformers in the right size range. Many transformers will have leads that can be wired in series or parallel to give two voltages. The taps on the transformer just depend on how you hook them up. You will have a much better understanding of how this all goes together that way. Actually, I would recommend sitting down with the schematic, the parts layout, and the top and bottom board traces and going through the entire circuit. I do not believe that R11/R17/and diode 3 exist. I think that the 10 ohm resistor is number 23, but it really doesn't matter.
You can also see the size of the components. They simply go from the ground wire of the AC to the ground/chassis lug of the jacks. You can see how the 100 ohm resistor and 100 nf cap are hooked up in picture 21. I do not have any sound clips for the pedal.īajaman posted lots of pictures of the pedal. I'll have a go at some of your questions, but please understand that I have not built this pedal (yet). Let me know what you think about that idea. The TLO71 is equivalent to a single op amp IC like the well known LM741,the difference with the TLO series op amp ICs is that they have FETs as the input devices,this has at least a couple of benefits,the bias current for the inputs is very low,secondly,they are designed as low noise devices.Ĭonnecting a TLO71 as a buffer produces an amplifier with a gain of 1,simply connect the output pin to the inverting input. Normally,the input pins on an op amp IC such as a TLO71,72,82,etc,are very high,about 1M ohm,the output impedance is something like 100 ohms,so the input pins would not load down the tone circuit,but you'd have a much significantly lower output impedance,which means that you would get a higher output signal level,as well as a brighter sound.
#Bk butler tube driver 3 knob mod#
The output impedance of the BK Butler Tube Driver is pretty high,I'm guessing that it's about 100k,or it could be more than that,Ī possible mod is to put a TLO71 op amp IC after the output level control,wired up as a non-inverting buffer. Just thought you might be interested in a possible modification to the Baja BK Butler Tube Driver,that I just thought about,
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