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Articles/Updates

SE OTL Correction  Posted June 16, 2006
    Corrects circuit error.

SE OTL Noise Reduction  Posted Jan. 3, 2006
    Input cable replacement to reduce noise.

OTL Operation Class A or AB   Posted Oct. 13, 2003
    This article shows that all push-pull OTLs operate Class AB. 

Grounded Grid Preamp High Gain Modification   Posted Oct. 1, 2003
    A simple mod to increase gain to 30 dB.

Tube Analyzer Safety Notice  Posted August 11, 2003
    Concerns Tube Analyzers supplied with metal base 6550 tubes.

Adjusting Transformer and Line Voltage with an Autotransformer.  Posted May 4, 2003
    Shows how to adjust the voltage on the Balanced Power Supply and any other transformer operated device.

Important! T16 Fix to protect amp from being damaged by bad tubes.  Posted Jan 23, 2003.

T16 Stereo Modification to Eliminate Ground Loop Noise.  Posted Jan. 4, 2003
    This article gives a simple mod that eliminates a small noise level.

Amp Gain and Input Sensitivity  Posted Dec. 31, 2002
    This article discusses when a preamp is needed and how much gain a system needs to have. 

Amplifier Output Impedance  Posted June 23, 2002
    This article explains the importance of amplifier output impedance, how it affects sound and how to calculate it.

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