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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.
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.
03-24-2025, 01:48 PM
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