Bernard d’Uur’s little lab; doctor is in!

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A blog about vintage amps, pedals and their working. For over 20 years I’ve been dissecting amps, pedals and guitars to see what makes them tick! And I love a good mystery! So dive together with me in the information I can dig up from various places (both digital and analog) to tell you more on the units I work on. My main addictions are Fuzz pedals, Chorus pedals and 50’s amps. And the rarer, the better

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Articles of interest

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  • Joyo / Fame – Sweet Baby amp JTA-05

    Joyo / Fame – Sweet Baby amp JTA-05

    Sometimes one of these little amps come into my room for some TLC. This amp came in for something extra: to check if the amp could withstand some abuse and see if I could…

  • Colorsound – Powerboost Reissue

    Colorsound – Powerboost Reissue

    Recently I got a reissue of the Colorsound Powerboost in for some TLC.  I love Colorsound pedals. The first pedal I ever bought (while on vacation in London) was a Colorsound Overdriver. That pedal…

  • Gibson – RD Artist bass

    Gibson – RD Artist bass

    I got this bass in for some TLC. There is some low level noise in the signal and the treble boost mode functions more like a fuzz. Let’s dig in! The Gibson RD Bass…

  • Harmony – H66 Vibrajet

    Harmony – H66 Vibrajet

    Now for some treat! I got this guitar in just for some fun and just a little TLC. The Harmony brand was founded in 1892 and through some rough patches released millions of guitars…

  • Menatone – Red Snapper (mini)

    Menatone – Red Snapper (mini)

    When I started to engage in understanding effect pedals, one of the first pedals I ventured in was the Menatone Red Snapper. A friend of me had the original version that had a broken…

  • Peavey – Stereo Chorus 400

    Peavey – Stereo Chorus 400

    Sometimes you get visited by a very nice amp! This Peavey is a very nice amp! In the 80’s solid state amps were ruling. And after the release of the Roland Jazz Chorus, chorus…

  • Marshall 2195 – 100W Lead and Bass

    Marshall 2195 – 100W Lead and Bass

    Another beauty came in for some TLC. It doesn’t keep the volume up and lately it just cuts out.  In the 70’s amp builder were taking the solid state route as that was hip…

  • Ibanez – OD-850 / Maxon D&S vintage and reissue; an amazing (bass) fuzz!

    Ibanez – OD-850 / Maxon D&S vintage and reissue; an amazing (bass) fuzz!

    Sometimes you discover something that was always there but you never mentioned to look or investigate. And this ‘Overdrive’ pedal is just that! In the 70’s the terms Overdrive, Distortion and Fuzz weren’t that…

  • Peavey – Classic 30; BIAS issues

    Peavey – Classic 30; BIAS issues

    I’ve read a lot on the BIAS issues on the (most older) Classic 30 amps from Peavey. As I haven’t found a clean and clear way to BIAS this amp, I thought I shared…