There are a few "4004" heads around used, but with different face plates indicating different vintages. Anyone know how to tell which is the more recent one? Basically I am looking for a used head, around 300-400w, and on a budget.
4004's? if it has some "arcs" and is blue/black its like 2002 up to present. if it has orange lettering, NO arcs and blue/black its like 1999-2002 found this info on old "vintage" swr page older style newer I don't know what SWR had for "midline" before 1999.