By Steve Graham DIY EL84 Project: Part 2 – Circuit Board & Chassis Prep I strongly recommend that builders considering this project use the parts and chassis specified in the previous installment in this series. If builders go off-plan, positive outcomes are less certain. This is not to say that if, for instance, different binding posts are desired or a different brand or type resistor is preferred, it should not be used. As long as these parts have the same rating or specification or are rated at a higher voltage or wattage, all should be fine. The capacitors specified in the parts list have been selected to fit the circuit board. If substituting other caps check their physical size and lead spacing. As an example, the output binding posts I selected require ~1/4” mounting holes. Holes larger than about 3/8” are difficult to drill in 3mm thick panels. Most binding posts require 1/2” mounting holes. If you have the means to drill large holes, or have access to a tool and die shop, go for other binding posts if you wish. The large holes where the tubes protrude through the top plate are cut with hole saws. This can yield a [...]
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