This is a table of equivalents based on data
given by the manufacturers. Valves specified in the first two
columns may be replaced by those specified in the the fourth and
fifth columns. The reverse is not necessarily so, it may work,
the pin out will be correct, but ratings may be exceeded in some
applications or other characteristics may cause problems.
Specific searching is best carried out by Edit->Find in This Page followed by typing in the
number of the valve concerned. I hope to
have search facilities available in due course.
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The characters below will lead to the beginning of that section of the table.