El 84 Single Ended Guitar Amp

El 84 Single Ended Guitar Amp Set
El84 Single Ended Guitar Amplifier
El84 Single Ended Guitar Amp Layout

WARNING

Tube amplifiers operate at high voltages which may cause property damage, serious injury or death. Proceed at your own risk. The content on this website is intended for informational purpose only.

Free Guitar Amp schematics in PDF format.

2W Tube Guitar Amplifier, 12AX7 & 12L8GT Single Ended

This is a low power Guitar tube amp suitable for practicing, recording or miking through a PA system. The preamp circuit and features are similar to those on a Fender Tweed era Princeton: Single Channel, Volume and Tone knobs.

The 12L8GT output tube used is pseudo exotic, but full of sweet tone. It is a dual pentode in a single bottle with an octal base. In this circuit the two sections work in parallel single ended. Gibson did something similar in a version of their Gibsonette, except they used 6V6GT.

I built mine as a head, but it could easily be built as a combo. 2W can be surprisingly loud. This is not a 'bedroom amp' unless you equip your speaker with an L-pad or similar circuit. Use link below for the PDF schematic.

Oct 27, 2017 Direct Coupled EL84-drive-EL84 Single Ended Amplifier. By request, here is the schematic for my dc coupled EL84-drive-EL84 amplifier. If you build one, be sure that you keep the heater to cathode voltage differentials within limits. The voltage divider I used works, but there are other ways to skin that cat. I have owned a bunch of single ended 6v6 and EL84 amps (and have tried the Yellow Jacket EL84 converter in all of my 6V6 stuff). In a single ended set-up, the 6V6 is dark, smooth and can get ragged/wooly when pushed to the max. The EL84 stays strong in the mids and highs to the point of harshness when pushed.

5W Tube Guitar Amplifier, 12AX7 & EL84 Single Ended

Almost identical circuit to the 2W amp, except output tube is a single ended EL84 (6BQ5). This is a fairly typical design that resembles entry level amps from the 1960's. Loads of tone.

5W Tube Guitar Amp, 12AX7 & EL84 SE Schematic

5W Tube Guitar Amplifier, 12AX7 & 6V6GT Single Ended

Almost identical circuit to the EL84 amp, except output tube is a single ended 6V6GT. Very similar to a Fender Princeton (5F2). The biggest difference is the rectifier - the schematic is drawn with a solid state diode rectifier in place of the 5Y3 tube used in the day. Tone difference? Sure, everything sounded better back then...

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2W Tube Guitar Amplifier, 12AX7 & 12L8GT Single Ended