[82] Guitar Effects Patents

Date: March 18th, 2008 | Comments : [3] | Categories: DIY.

Guitar FX patents

I often read posts on the pedal forums that claim that guitar effects circuits cannot be patented. The truth is that they certainly can, and many have been issued in the past, including patents for the design of the Cry Baby wah, Univibe, Mutron Envelope Filter and the Pignose amp.

I’ve made a page with links to 50 audio related patents. Enjoy!


[80] Note-to-Frequency Calculator

Date: March 13th, 2008 | Comments : [1] | Categories: DIY.

amz piano keyboard

I just posted an online calculator that can convert musical notes to their corresponding frequency value.

Try it out!


[79] Google Radio Automation

Date: March 13th, 2008 | Comments : [1] | Categories: Uncategorized.

Google SS32

When you are listening to the brain-numbing easy listening station at work during the day, Google is probably running the radio station.

Check out the Google SS32, which is a state of the art automated playlist control system.


[78] Modding the EH LPB-1 Nano

Date: March 9th, 2008 | Comments : [18] | Categories: DIY.

EH LPB-1 Nano

The LPB-1 is a good value for the money, but there are two ferrite beads and two 100pF capacitors left in the signal path even when the circuit is bypassed. The additional capacitance could create an upper frequency loss when driven by a high impedance source like guitar pickups.

This mod removes those components, which were not on the 1960s original, and converts the pedal to the more typically understood definition of true bypass.

Remove C4 and C5 – not needed. Replace FB1 and FB2 with jumper wires. Done.

It will then be 100% true bypass with nothing but wire between the input and output jacks when bypassed.

These instructions are for the “Rev. B” circuit board.


[76] Mosfet pin configurations

Date: March 5th, 2008 | Comments : [3] | Categories: DIY.

Mosfet pin configuration
I bought some 2N7000 mosfet transistors that arrived today, and when I checked the datasheet, the pin designations were as shown here. This S-G-D configuration is the opposite of the common BS170 that I have previously recommended for the AMZ Mosfet Booster.

The pinout of this part underscores the need to always check the pin configuration of your transistors. I would estimate that placing the transistor into the circuit with the pins oriented incorrectly is by far the leading cause of problems that builders have with my mosfet booster.

If you suspect this is the problem, the mosfet can be rotated 180° to correct it.


[75] Pedal modding tip

Date: March 4th, 2008 | Comments : none | Categories: DIY.

Solder paste flux

A quick tip for everyone who likes to mod pedals. Copper desoldering braid is commonly used to draw liquefied solder off the pcb pads as you are trying to remove parts, but sometimes the heated solder just does not want to stick to the braid, especially the new lead-free stuff. Here is how to make it practically jump from the board onto the copper wire.

Get some paste flux, such as the Kester shown here, and wipe the braid across the surface so that a small amount of the paste is on the surface of the braid before you start. Now, when you heat the solder on the pads and apply the braid, the solder will be drawn to it and the pad (and part lead) will be left clean.

This is so efficient that you can remove solder from the pads on an IC and then just lift the chip off the board with little or no damage. Give it a try the next time you are modding a pedal!

Also, check out my Big Muff and Rat mods: http://www.muzique.com/ebook.htm


[74] Epi Valve Jr. mods

Date: March 1st, 2008 | Comments : [5] | Categories: amps.

Epiphone Tube Amp

The slightly dusty pcb from my Epiphone Valve Jr. amp…



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