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Link and icon for article on MXR preamplifier

MXR’s System Preamp II (M-150) -- Reverse Engineering a Schematic

Link and icon for article on RCA Dynagroove recording process

RCA Dynagroove: The Sound of Tomorrow

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Easy Way to Turn the Eico HF-20 into a Monoblock

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Better Hookup Wire

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Improving the Eico ST-84 Preamp

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Restoring Eico’s ST-Series Knobs

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Making Your Own Top Connectors for the PDP-8/e Minicomputers

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A Unique Tube Heater Supply

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How to Test Power Tubes with Common Lab Gear

 

Link and icon to article comparing 7591 tubes

Brief Comparisons of 7591 Vacuum Tubes

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Can You Operate a Vacuum Tube Amp Safely Without a Load?