MXR GT-OD
Some of you may be thinking this layout looks pretty familiar, and yes, it is extremely close to the ZW-44 Zakk Wylde overdrive. So close in fact that I’ve included a switch that will select either the GT-OD or ZW-44 on the fly. I’ve got an original ZW-44 and really like it, but watching some … Read more
Greatly Improved JFET Matcher
So moving on from RG’s JFET matcher which measures VGS (or more precisely, the voltage at which RDS is 10K) , this is another version by Sebastian from runoffgroove which allows you to measure VP and IDSS depending on the position of the switch. The centre off position should be used to insert and remove … Read more
Spring Reverb Stomp Box / Stage Center Reverb
Stage Center Reverb Bill of Materials Resistor ((1/4 watt rating) 2 – 4.7k 1 – 10k 1 – 22k 1 – 33k 1 – 47k 1 – 470k 1 – 1M 1 – 2.2M Pots 2 – 50k log can be linear or log (audio) taper. Capacitors (minimum 16 volt rating) 1 – 220pF 1 … Read more
JFET Matcher
This should be a useful little circuit for a few people and will allow you to match JFETs VGS (or more precisely, the voltage at which RDS is 10K) when required in some phasers etc. Based on the information posted by RG here which should explain how everything works. Compact version with onboard sockets suitable … Read more
MXR Phase 45
I thought a small and simple phaser would be another good addition and so the Phase 45 is the automatic choice to remain 1590B friendly. For the best results the JFETs need to be matched so you can either swap and change to select the pair that give the best sound, or measure them using … Read more
Systech Harmonic Energizer
Not a lot of info on this old pedal, but it was a request so I’ll let Vince tell you about it! :o) I’ve omitted the reverse polarity protection part of the circuit to keep it more 1590B friendly, but if you do want to add some protection just put a 1N5817 or 1N4001 in … Read more
