Tools, Tones and Toys for Guitarists
This is the CMOS version of the Electro-Harmonix Hot Tubes from the late seventies. I used the Aion FX schematic, which has some minor differences to the original. Smaller Drive pot, as it’s difficult to source pots over 1meg, and some improved power protection and filtering. ELECTRO-HARMONIX HOT TUBES – VERO LAYOUT HOT TUBES VIDEO DEMO
This one seems to have many parents – I was not really sure what to tag it as. It started life as an Electro-Harmonix Dr Q, which ended up as a Jack Orman Dr Quack and then at some stage Mark Hammer mods have appeared, and more changes bought it to Nurse Quacky by Runoffgroove. Hopefully … Read more
Per request. The switch can be replaced with a tone control. Just omit 100k resistor at column 17 and replace the switch connections with the lugs of the 100k tone control.
What more can be said about an opamp Big Muff? ELECTRO-HARMONIX OPAMP BIG MUFF – VERO LAYOUT VIDEO DEMOS
A forgotten and quite odd one from the early days of EHX. Despite being marketed as a “Microphone Echo” and having “Echo” as one of the labels for the controls, this is actually a tremolo circuit with some quirks. There is no “Depth” control as in most tremolo effects, instead there are the “Echo” control … Read more
The modern version of EHX Frequency Analyzer. The ICL8083 IC is obsolete but there is still some vendors that have it in stock. Came out taller than expected since I wanted the bipolar voltage doubler circuit on the same board as the main circuit. But it will fit sideways in a BB enclosure… Schematic is … Read more
It is Pie Day so here is a layout of an old Ram’s Head variant. Rarely cloned and some cap values is not found in any of the other vintage EHX variants. 220pF/680pF caps replaces the standard 470pF/500pF values and the tonestack has less mid scoop. Still added a Mid switch for some sligtly boosted … Read more
