Author Archives: t-geek

New video : IT-11 Audio Supercharger Spring 70s

Eric Collet, from Mess Zero, is trying the new Supercharger Spring ’70s : For more information, please see :

Posted in Amps, Music Gear | 2 Comments

Buffer samples !

Many  “true bypass” pedals, or long bad quality cables can create problems such as dull sound, loss of tone … In this case, you can try a buffer, or even two buffers : one at the beginning of the chain … Continue reading

Posted in Music Gear, Pedals | Tagged | 2 Comments

Ray Dolby passes away at 80

Ray Dolby, the US engineer who founded Dolby Laboratories and pioneered noise reduction in audio recordings, has passed away today in his home city of San Francisco aged 80. Dolby was born in Portland  (Oregon) 1933, where he spent many … Continue reading

Posted in Music Gear | Leave a comment

IT-11 Supercharger Spring ’70s

Hey, a new Supercharger ’70s, this time with a nice spring reverb ! 50W, 2 x EL34 cathode bias (no need to rebias it while on tour !) Tubes  : 1 x 12AU7, 3 x 12AX7, 1 x EF86, 1 … Continue reading

Posted in Amps | 2 Comments

Silverface Fender Bassman 100

A Bassman 100 on the bench. Missing PT (burnt, I suppose …) bassman_100_schem Thanks to for the layout, thanks to Chris A. for pointing out an error This model of Bassman was made from 1972 to 1976. This one … Continue reading

Posted in Amps | 24 Comments

IT-11 ActivABY Box

A new product from IT-11 (see : active ABY Box. My client ordered this to send his signal to 2 amps. Each output has its own JFET buffer to prevent loss of definition of the signal / sound (high … Continue reading

Posted in Pedals | Leave a comment

New ! The Highwayman Route 88

Same as the Highwayman, but with more meat ! Please go to the Highwayman Route 88 page

Posted in Amps, Music Gear | Leave a comment

Simple buffer !

Two very simple buffers prototype : one based on a 2N5457 J-FET transistor, the other with a Burr Brown OPA 134. No really differences between the two pedal, maybe the one with IC is lightly brighter … hard to say. … Continue reading

Posted in Music Gear, Pedals | Leave a comment

Maxon treble booster … “untrebled” !

I had this ’70s Maxon Treble Booster somewhere in a drawer … While I like very much Range masters TB, I don’t like this one, it sounds terrible to my ears. I redrawn the (very simple) schematic : With 2.2nF … Continue reading

Posted in Pedals | Tagged , | 2 Comments

12″ guitar cabinet – vented

It’s a cab equipped with a great WGS Reaper 55Hz speaker ! 600mm x 408mm x 290mm Vented (70Hz) Speaker : WGS Reaper 55Hz – 30W Wood : 18mm / 12mm

Posted in Amps | Tagged , | Leave a comment