Published at Tuesday, March 26th, 2019 - 05:59:28 AM. wiring. By Romana Maurice.
A common problem. Using a Varitone or Varitone variation means switching capacitance. Depending on the switch’s design and its location in the circuit, this can result in a loud popping noise in a passive guitar wiring scheme if you switch capacitors. You can prevent this by turning down your guitar’s volume pot or putting your amp on standby, but what if you want to use the rotary switch mid-song? There’s an easy solution: Get some 10M resistors. (I like 1/4-watt metal-film resistors because of their small size, but you can use any resistor type or voltage you want, so long as it has the correct resistance.) Solder one between the rotary switch’s center input lug (labeled “Center lug connects to volume pot lug 3” in Joe’s diagram) and the lug the capacitor is connected to. You need to use a separate resistor for each capacitor, which means a total of three resistors if you follow Joe’s diagram.
The second edition of Electricity, Electronics, and Wiring Diagrams for HVAC/R, a completely revised textbook from the Air-Conditioning and Refrigeration Institute (ARI), is now in print. The textbook, published by Prentice Hall, offers technicians a basic book on the principles of electricity and HVACR systems. Written for students and professional HVACR technicians, this new edition covers all of the key concepts and service techniques for electricity and electronics applications, says ARI. Everything from basic electrical wiring diagrams to modern electronic control systems is said to be covered in a clear, non-mathematical, applied manner.
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