I just noticed that all the tubes I cannot test are metal tubes. Is there a separate chart or supplement for these types?
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Yes, there most probably is a very lengthy supplement, and I suspect that you can obtain it from: http://radioera.com I have a Hickok 800A, and about 15 years ago I obtained the supplement for it (many pages filled with tiny print, so it would not be practical for me to reproduce it for you) from a gentleman by the name of J.W.F. Puett, of Puett Electronics in Dallas, TX. He was and/or is a prominent figure in the antique radio collecting field. He is no longer in business, but I understand that a few years ago Radio Era Archives (url shown above) purchased Mr. Puett's inventory of literature and other items. The supplement I have, btw, is identified as being for Hickok Models 533A, 600A, and 605A, but I have never had a problem using the settings it lists on my 800A. So keep in mind that a supplement useable with the 6000a may be identified as being for other models. The people at the link I provided may be able to advise further on that. Regards, -- Al |
The mutual conductance (micromhos) reading is the minimum reading for a "good" tube. A reading less than that indicates a "weak" tube. Note that to read micromhos directly you do NOT set the shunt dial to what is listed in the chart. The chart setting is for reading on the "good/replace" scale on the meter. To read on the micromhos scale on the meter, you set the shunt dial to one of the three red dots that are on it, corresponding to which of the three micromhos scales you want to use. You'll find the following video of interest, although it looks like he is using the tester incorrectly relative to what I said in the previous paragraph about the shunt setting: http://www.youtube.com/watch?v=OVMnKIM4LEc Also, note that the 6000A does not provide sockets for testing of early tube types: http://www.vacuumtubes.com/6000.html Regards, -- Al |
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