I have a Decca Marine RX, comprising 3 units and a
Display unit all tube construciton. Two of the units have lots of high stab
xtals. These xtals are glass encapsulated and gold plated construction. Does
anyone know the frequency of these xtals, the freqs are not marked on
the xtals, each xtal is enclosed in a metal can and marked GEC and other
ref numbers. These look promising for other LF work.