[27] Tube books

Date: June 28th, 2007 | Comments : [1] | Categories: tubes.

Over 1Gb of vacuum tube books for free!


[26] Guitar pedal kits

Date: June 27th, 2007 | Comments : none | Categories: DIY.

Last night, I ran across some kits on a Japanese pedal site. The instruction sheets are well done and include schematics. Here are a few of them for you enjoyment:



[25] Blue Cat Audio VST – free!

Date: June 26th, 2007 | Comments : [2] | Categories: VST.

Blue Cat free VST

Blue Cat Audio has a freeware pack of VST and Direct-X plugins.


[24] Ceramic Capacitors for Guitar Pedals

Date: June 25th, 2007 | Comments : [1] | Categories: DIY.


Ceramic capacitors have received a bad reputation, some of which is not deserved. There is nothing wrong with using ceramic capacitors in guitar pedals, if you pick the proper type. You will see a variety of different ceramic compositions in the capacitor section of the big parts catalogs, including NPO, COG, X7R and Z5U.



[23] Piezo Pickups

Date: June 18th, 2007 | Comments : [20] | Categories: DIY.

Piezo Pickup
A piezo pickup as used on guitar can be thought of as a voltage source in series with a small value capacitor, as shown here. The capacitance of a typical piezo pickup is in the range of 500pF to 800pF.



[22] AMZ Goes Solar (Part 2)

Date: June 10th, 2007 | Comments : [5] | Categories: power.

Solar bettery charger

AMZ goes solar – Part 2!


[21] Delay pedal tutorial

Date: June 8th, 2007 | Comments : none | Categories: Uncategorized.

Here’s the pedal tutorial of the day… Greg Koch, who is a great guitar player with an oddball sense of humor, gives us a lesson on using a delay (among other things). Enjoy!


[20] MicMix Dynaflanger

Date: June 5th, 2007 | Comments : [2] | Categories: Uncategorized.

MicMix (now defunct) produced a flanger in the late 1970s that had an unusual feature…  the delay could be controlled by the envelope of the input signal.  This made for some unusual effects!

The Dynaflanger is probably most famous from its use by Frank Zappa.

Courtesy of the original designer, here are the schematics:





Be warned, each file is about 4Mb!

He now sells THAT Corp. chips in small quantities for  hobbyists so visit his main page at http://www.ka-electronics.com/


[19] Powdercoating manual

Date: June 4th, 2007 | Comments : [1] | Categories: DIY.

Powdercoating is an alternative to painting a pedal or other project. A dry powder is applied to a metal surface that has an electrostatic charge and the powder adheres to the metal. It is then heated to melt the powdered pigment into a hard durable surface that is like a skin on the metal.

The powdercoated layer is many times thicker than a paint coating and more resistant to chips, cracks or other damage. It is an excellent surface treatment for a stompbox.

Powdercoating requires special equipment to apply and the technique is different from using a paint spray can. Fortunately there is an excellent free manual available online:

Powder Coater’s Manual


[18] LED indicator for tube amps

Date: June 3rd, 2007 | Comments : [2] | Categories: DIY.

LED power
Some of us build tube amps, so here is a circuit fragment that may useful. It demonstrates how to power an LED panel indicator from the AC heater winding.




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