This Mesa Boogie Dual Rectifier available to download in PDF document and separated image files. You will find the complete diagram of this dual rectifier there. There many parts of Mesa Boogie dual rectifier solo head schematic diagram.

Download complete schematic diagram of Mesa Boogie Dual Rectifier:
1. PDF Document

Mesa Boogie Dual Rectifier

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2. Image Document (more clearly than PDF document)

Mesa Boogie Dual Rectifier Schematic

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Mesa/Boogie is a company in Petaluma, California that manufactures amplifiers for guitars and basses.

Fender Bassman was a bass amplifier introduced by Fender in 1952. Although it was originally designed for bass guitars, it is often used for normal electric guitar in rock and roll, blues and country music.

Fender Bassman history from WikiPedia:

The Bassman was designed for the first mass-production electric bass, the Fender Precision Bass. It was introduced in 1952 and discontinued in 1983. Up to until 1954, the Bassman amplifiers had only 1 speaker (circuit 5B6), but it was the four 10″ speaker combination that came to be one of the greatest and most sought after amplifiers in history. The original series of 4×10 Bassman amps included the 5D6 (1955), 5E6 (1955), 5E6-A (1955-1957), 5F6 (1957) and 5F6-A (1958-1960) circuits.

In 1990 Fender began producing a reissue of the 1959 Bassman model 5F6-A, known as the ’59 Bassman. The newest version of this reissue is the ’59 Bassman LTD. The LTD version has a lacquered tweed covering and 4×10 inch Jensen speakers instead of the Eminence speakers used in the earlier ’59 Bassman reissue series.

Download Fender Bassman 5F6-A tube amplifier circuit diagram in PDF document:

Fender Bassman 5F6-A Amplifier Circuit

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This document is the manual of 2x90W Stereo Tube Power Amplifier with EL34, model K4040 by Velleman. The document in PDF version contain of schematic diagram, part list, component guide, step by step how to build the circuit. This circuit is for advance hobbysts…

Stereo Tube Power Amplifier Features:

• Pure valve sound with high quality EL34 valves.
• High quality black and chrome housing.
• Chrome valve socket covers.
• Easy bias adjustment with LED indication.
• Removable bottom for easy access and service.
• High quality capacitors and components.
• Gold plated input and speaker terminals.
• Standby function.
• Soft start circuit for power transformer.

Stereo Valve Power Amplifier Specifications:

• 2 x 90Wrms in 4 or 8W.
• Up to 2 x 15Wrms full class A.
• Bandwidth: 8Hz to 80KHz (-3dB/1W).
• Harmonic distortion: 0.1% @ 1W/1KHz.
• Signal to noise ratio: >105dB (A weighted).
• Input sensitivity: 1Vrms.
• 115VAC or 230VAC / 500VA max.

Download the complete TUTORIAL of 2x90W Stereo Tube Power Amplifier with EL34 from the following link:

Stereo Valve Power Amplifier

1 file(s) 1.32 MB

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The power supply design diagram already provided on above tube amplifier circuit diagram. Please be careful during constuction, it need enough experience and please pay attention the high voltage in all section of the circuit, electric shock danger!

Schematic Diagram:

Power Supply:

Component List:

It is a classic design of power amplifier 35 W using tube, with two EL34 in connection Push-Pull, by Siemens & Halske, with design date 03/24/1953 and code SV410 / 1. The amplifier worked from 1954 to 1989, whenever and went off, with an average lifespan of 15 hours a day. Showed no particular damage beyond the replacement tubes, resistors and capacitors, resulting from natural wear.

A significant change was the replacement of the rectifier device of lamp diodes. The only problem will be for those who try their construction, will be the output transformer (applies to all tube manufactures), because the code is not helpful. Can be replaced with a conventional output transformer suitable for EL34. During the construction, it is need (applies to all circuits respectively) enough electronic experience and attention to the high voltage, electric shock risk.

source: http://users.otenet.gr/~athsam/Power_amplifier_EL34.htm