Electro Harmonix
Electro Harmonix Hot Tubes
And a modified layout for more gain on tap for high gain fuzz sounds. 75k feedback resistor right to IC1 is changed to a 250k pot and 1000nF cap is connected straight into 8,2k resistor which is connected to the first hex inverter.
Electro Harmonix V1 Triangle Big Muff 66#11 1971 “Green Cap”
One of the more common of all the Triangle variants, easily identified by large green film caps which usually was 120nF or 100nF. Compact layout And a “mojo” layout in the vein of vintage units with 0,5w carbon composition resistors. The brave one could fit it in a 1250b enclosure.