Unique Tube Amps for Guitar


The Amps



Retro 6V6


Dyno Tweed

Octal Champ

Mini Champ

Jazz Tank

Fanon Restoration

Living Room Amp


The Octal Champ

The Octal Champ is a single-ended guitar amp with a 6SL7 preamp, 5Y3 rectifier and 6F6 output tube. The 6F6 is similar to a 6V6 with slightly less power. The sound is smooth and warm with a gentle breakup that begins at 3 and gets rock distortion on 10. This is a fun amp!

Here are some photos of the chassis. It has a Champ output transformer and a Crate speaker, which sounds surprisingly good (they were made by Emminence).

Here are some sound samples recorded with a Boss BR8 and a Samick Les Paul with DiMarzio Tone Zone and PAF Pro pickups. I start with the neck pickup in single-coil, switch to double-coil, then switch to the bridge pickup. I kept the volume on 6 and used the exact same setup to record it.

  • OC_Goodalls.mp3 These are the white Goodall coupling caps that came with the amp.
  • OC_PIO.mp3 These are the Russian Paper-In-Oil caps (same values: .022 and .047).
  • OC_PIO2.mp3 A second recording with the Russian Paper-In-Oil caps.

The PIO caps are significantly louder and have more defined highs, which is what you'd expect from high quality capacitors.

Check out my tube guitar amp repair blog (on MySpace)

Natural health research and writing is my main career. I'm a licensed naturopathic physician. www.naturdoctor.com and LinkedIn

Building and selling tube amps for guitar and HiFi is a hobby based on my previous career as an Electrical Engineer. Ampersand Amps