8) UX-226 Globe Radio Tubes
How these were tested. With most tube testers, when testing 1.4 volt filament tube like the 26, The filament voltage can drop when tube is inserted to be tested. After I insert the tube, I measures the filament voltage and bring it back up to the required 1.4 volts and then re-adjust bias control for proper bias voltage before I test them.
These were tested on a calibrated Triplett 3444 for all conditions ~ PASSED
You can see the test results in the last picture.
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