I've just been given a very large pentode and would like some spec.It is manufactured by ITT and has the following numbers on it.CV445 and 5J/180E. It will probably never get used but I am intrigued. Many thanks Conrad G0RUZ -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com