[Amps] 4CX250M questions and MARCONI linear questions

[mike kendall]

Hello,
  I have CC'd my military email address, please reply to me at that address of kendallm at lhd2.navy.mil
  I cannot check Yahoo while on the ship and it may be weeks before I can get on Yahoo again.
  I am experiencing reliability issues with a Marconi amplifier system for the URC-109.  We are going through hundreds (no joke) of 4CX250M's a year while most of the 7 amplifiers are left off to reduce tube usage.  All the amplifiers are eating tubes so it is not isolated to a specific amplifier....last time we checked VSWR it was within specifications for the antennas.  Previously, when I had dropped a post on this reflector an ex-Marconi employee had emailed me.  Any assistance would be greatly appreciated.  This system is a bit unique as it is one of the first broadband/frequency agile amplifiers.
  Best Regards,
Mike KE6CVH
  


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