[Amps] 4xc250b Valve Bases - Screen ring capacity - HF v VHF

[Gary Smith]

Hi Ken and all.
I suggest you go to www.eimac.com and look for the solution there.  Took a quick peek myself, lots of info and links that may help you find the answer.  They may have the capacitor value listed, and if they do not, drop a short note the parent company, (CPI) they will probably tell what value is which.  I have found them to be very forthcoming with this sort of odd info even after I have mentioned that I am a ham operator.
73,
Gary... wa6fgi

  ----- Original Message ----- 
  From: Ken G3WCS 
  To: amps at contesting.com 
  Sent: Saturday, June 04, 2005 11:55 PM
  Subject: [Amps] 4xc250b Valve Bases - Screen ring capacity - HF v VHF


  Hello all,

  I have a couple of 3rd party bases for 4cx250 valve bases but am unsure 
  if they are designed for HF or VHF operation. I know that the capacity 
  of the inbuilt screen grid capacitor was different between HF and VHF 
  bases. I could check this (roughly) with the capacity function of my DVM.

  Can anyone point me to the approximate capacity I should see for HF and 
  VHF bases?

  Thank you and 73,


  Ken.
  -- 

  Ken G3WCS
  IO83rh : Cheshire : NW England
  (+44) (0)870 765 1632 (home)
  (+44) (0)7733 400 950 (mobile & sms)
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