Quote:
Originally Posted by bandersen
It should lower the needle, not raise it during the cutoff test.
Not sure what you mean by truthful. Don't think I've ever found a 7JP4 with bad emissions - it's the phosphor that wear out first. Probably why Sencore dropped the 7JP4 from the tube chart in later versions.
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The needle went up alittle bit in emission test the cutoff don’t work with these tubes being the 440 was not made to check the 7jp4.