AIWA: TP-1011 Reel to Reel Preamp

AIWA TP 1011 Preamp vero layout v1a 95e16a344feb

The AIWA TP-1011 is the reel-to-reel tape preamp Richie Blackmore from Deep Purple used to drive his Marshall.  I’m not a huge Deep Purple fan, but I do like the sound of some of these old reel-to-reel preamps.  This layout is for the stock circuit running at 18v.  If I ever get around to breadboarding the … Read more

SHIN-EI: Companion Fuzz FY-2

SHIN EI Companion Fuzz FY 2 vero layout v1b c6c5112a08ca

A classic Japanese guitar effect – the Shin-Ei Companion Fuzz – it has its roots in the Fuzzrite, with a notch filter at the output.   SHIN-EI COMPANION FUZZ FY-2 – VERO LAYOUT FY-2 SCHEMATIC Usual notch filter response. It’s a fairly broken-looking wave – not the infamous volume drop compared to the input level, which is normally … Read more

ELECTRA: Modular Powered Circuits – MPC11 Frognose Amp

ELECTRA Frognose amp 6c0de92b6e97

Onto the Frognose – weird name right?  It’s based on the LM386 IC, which is an audio amplifier capable of driving a small 8-ohm speaker. In the configuration below, it’s capable of 20x gain, so it’s a pretty decent booster. If you aren’t familiar with the LM386, two of them are used in the Earthquaker Devices Acapulco Gold, and one … Read more

ELECTRA: Modular Powered Circuits – Tube Sound MPC8, AKA the Electra Distortion

Electra Power Overdrive schem 864c7570e06e

Recently the Electra Distortion grabbed my attention again, so as I often do, I went digging for more information on the Electra MPC series guitar effects (modular powered circuits).   One problem; Electra doesn’t appear to have ever made a Distortion module.  Interesting…    Then I read what we know as the Electra Distortion is really … Read more

UNKNOWN: Parametric EQ / State-Variable Bandpass Filter

AVvXsEj4mm85nVviWLrUSX6tWj5qlG83IdmOzS15Jw6uvgFi Hhcor7eTXMQKyyXDl6uI NFGbXDNkx6j2EQu9UhRqP9gFBv J3Fo1diHrxECOxOeK2ATPE3i4I0PBR0HBquf Livhbo 603811d93c9f

I found this schematic a little while ago and thought I might give it a try, as I’ve been looking to make a single band parametric equaliser, in this case, based on a State-Variable Bandpass Filter.   It’s supposed to be from a Japanese textbook, but I’m not sure of its origin.  It looks remarkably similar to a … Read more