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Zenith 7-S-240 Eye tube question
Radioroslyn
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#8

06-01-2016, 07:08 PM
Well seem like your triode plate in the 6E5 is too low. Target is good which means that it with light up good if the tube is good but with low voltage on the plate will affect the gain of the tube. It takes -8v on the grid to close the eye as per the RCA tube manual. Perhaps the triode is weak. Try adding another 1M resistor in parallel with the existing one to make it 500K this will raise the plate voltage on the triode. Plate current is low like .2ma.
  Terry
(This post was last modified: 06-01-2016, 07:19 PM by Radioroslyn.)
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Messages In This Thread
Zenith 7-S-240 Eye tube question - by Eric - 05-30-2016, 04:37 PM
RE: Zenith 7-S-240 Eye tube question - by morzh - 05-30-2016, 09:34 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 05-31-2016, 02:00 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-01-2016, 02:41 PM
RE: Zenith 7-S-240 Eye tube question - by Radioroslyn - 06-01-2016, 07:08 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-02-2016, 09:04 AM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-02-2016, 05:20 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-03-2016, 07:02 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-04-2016, 02:21 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-05-2016, 12:13 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-05-2016, 04:14 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-06-2016, 04:55 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-07-2016, 05:28 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-07-2016, 05:29 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-07-2016, 08:10 PM
RE: Zenith 7-S-240 Eye tube question - by Eric - 06-08-2016, 05:02 PM



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