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Incidentally, the CRT checks out OK on my B&K 466. Red has the lowest emission, and reads at about 71 on the 100 scale; blue is highest and goes over 80. Certainly good enough. Life test (cutting off the heater voltage while continuing to read emission) on the red gun (since it was the weakest) was acceptable, though not really fantastic. So, at least things look pretty good from that perspective.
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