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May 2014

Amp DIY

ARTICLES

Ask Amp Man: The Vibro Champ Voltage Mystery

February 13, 2014
Why do the schematics differ between two supposedly identical CBS-era Fender amps?
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Ask Amp Man: Better Tones from “Boomy” Tweed Deluxes

January 9, 2014
Fender’s classic 5E3 circuit is prone to “flubbiness” at high volumes. Here are several easy fixes.
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Ask Amp Man: Better Biasing for Silverface Twin Reverbs

December 9, 2013
Blackface-style biasing makes it easier to set up and service ’70s Twin Reverbs.
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Ask Amp Man: Twintervention (aka Rescuing Rotten Twin Reverbs)

November 13, 2013
Master-volume Twin Reverbs of the ’70s have a deservedly bad reputation—but a few circuit tweaks can save them.
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Ask Amp Man: The Early-’70s Silverface Fender Twin Reverb: Dud or Dynamo?

October 15, 2013
Why don’t master-volume Twin Reverbs get any respect?
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Identifying Vintage Fender Speakers — and Battling Hum

July 29, 2013
What kind of speaker is in a 1965 Deluxe Reverb, and how to switch it out without increasing the amp's volume, plus tackling hum in modern Fender combos.
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DIY: How to Replace Your Amp Speakers—The Right Way

July 19, 2013
Whether you’ve blown your existing cones or are one of the adventurous few who realizes how powerfully you can tweak your tone with a new speaker, this 17-step guide shows you how to deal with everything from impedance to phasing and series/parallel wiring.
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How to Install Speakers in a 4x12 Cab: 2-Part Video Tutorial

July 19, 2013
In this two-part tutorial, Nashville amp tech Skip Sims shows you how to replace speakers in a 4x12 guitar amp cabinet.
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Playing it Cool with a Hot Rod Deluxe

July 16, 2013
Jeff addresses reverb dropouts and volume drops or fluctuations potentially caused by failure of a Fender Hot Rod Deluxe's low-voltage power supply.
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How Tube Amps Work

July 15, 2013
From voltage conversion to capacitors, pentodes, and class A operation, we demystify the basics of tube-amp functionality.
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