Guitar Amp Books® for Professional Builders

Books, Calculators, Tutorials, Technology, and Classic Vacuum Tube Designs for Guitar Amplifier Circuits

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6SL7srpp-KT77 Class-A SIPP/SEPP Amplifier

6SL7 SRPP / KT77 Push-Pull Class-A Ultra-Linear DIY Tube Amplifier:

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2A3-6SL7 SRPP Single-Ended Tube Amp (Loftin-White)

2A3 Single-Ended Loftin-White/Shunt Regulated Driver. Output: 3.5W @ 2.5% THD. OPT: 2.5-3k. Very simple and elegant little triode amplifier. The direct-coupled (no coupling capacitors) two stage circuit was designed as a laboratory amplifier in the 1930's but the team of Loftin and White.

6SL7 SRPP / 2A3 Single-Ended Tube Amp (Loftin-White) Schematic

Ultrapath Line Stage

In this article we explore the Ultrapath topology as a candidate for line-stage amplifier. What tube to use, which parameters are the best, what are the requirements for the power supply? We'd like to get low distortion, low output impedance, large headroom, low noise and hum. We try several different tubes and use PSPICE to find the best configuration for each tube. Ultrapath Line Stage

User Guide: Aikido Stereo 9-Pin PCB (Rev. C)

Aikido Stereo 9-Pin PCB (Revision C) user guide.

User Guide: Aikido Stereo Phono

Aikido Stereo Phono PreAmp user guide.

User Guide: Aikido All in One 9-Pin

Aikido Stereo 9-Pin user guide, all in one.

User Guide: SRPP+

SRPP+ pre-amp user guide.

User Guide: Constant-Current-Draw Amplifier (CCDA)

Constant-Current-Draw Amplifier user guide, 9-pin PCB version.

User Guide: Constant-Current-Draw Amplifier (CCDA)

Constant-Current-Draw Amplifier (CCDA) user guide (stereo octal PCB version).

User Guide: Aikido Cathode Follower (ACF)

Aikido Cathode Follower (ACF) user guide.

User Guide: Broskie Cathode Follower (BCF)

Broskie Cathode Follower (BCF) user guide.

User Guide: Aikido LV

Aikido LV user guide.