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Electrometer tube in UHF apllication

  1. Jul 11, 2015 #1
    Hello. Has someone ever been heard about using (in the past) an electrometer tube, for instance CK5886 as UHF preamplifier ?
  2. jcsd
  3. Jul 11, 2015 #2


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    The tube looks a if it is designed primarily to have very high grid resistance so it can be used for measuring voltages. The Gm is very low, and I think that, along with all the other 1.5V directly heated tubes, the performance at 100 MHz and above will be poor. I would be surprised if oscillation can be obtained at any frequency with this tube. There are much better ones available for UHF operation.
  4. Jul 12, 2015 #3
    Many thanks for reply
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