[Amps] Titan fan

W7RY w7ry at arrl.net
Sat Sep 6 13:54:52 EDT 2008


What is wrong with the fan? Is the motor defective? It's just a small shaded pole motor that may be available from WW Granger or other source.

73
Jim W7RY


  ----- Original Message ----- 
  From: John E. Cleeve 
  To: 'Dave Bowker' 
  Cc: amps at contesting.com 
  Sent: Saturday, September 06, 2008 5:14 AM
  Subject: Re: [Amps] Titan fan


  Hello Dave,

  Yes, I think that you are correct; the figures would need amending for two
  tubes, and, I assume how the airflow is fed to the tube bases, that is, a
  single air chamber beneath two tube bases, or two separate bases with a "Y"
  hose connection to a single fan. A simple "U" tube water manometer, was
  shown in several "tube period" ARRL handbooks, to aid the checking of "back
  pressure", but I do not have access to a Titan, to carry out any
  measurements. It just seemed unfair to me, that there appeared to be no
  information on replacing an obsolete defunct Titan fan. Perhaps if you have
  a greater knowledge of the subject/fans, you could amend my offering to the
  reflector?   Sincerely, John.

   

    _____  

  From: Dave Bowker [mailto:dbowker at sjv.net] 
  Sent: 06 September 2008 12:44
  To: g3jvc at jcleeve.idps.co.uk
  Subject: [Amps] Titan fan

   

  John,

   

  The figure specified on Eimac data sheets is for ONE tube.   I believe your
  calculation is for one tube --- am I correct?

   

  73, Dave, K1FK
  Fort Kent, ME

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