Uploaded June 2024 | Updated September 2026, 2 weeks ago

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Are my Tubes failing? How do I tell if my valve is microphonic? How do you match power tubes for balanced performance?
The Valve Tester MkII from Orange will assist any amp tech in quickly and easily uncovering valve faults.
orangeamps.com/product/valve-tester-mkii

This video contains paid promotion from Orange Amplification.
More details on how Science of Loud implements product promotion - csguitars.co.uk/disclosure
#scienceofloud #tubeamp #valvetester

Timecodes:
00:00 - Big Box-O-Valves
01:13 - Test Equipment is Complicated...
02:06 - Orange Valve Tester MkII
03:46 - Testing ALL of my Valves
04:20 - 'GOOD' | Pairing Power Tubes
05:44 - 'GOOD' | Preamp Valve Placement
07:15 - 'WORN' | Replacing Tired Tubes
07:52 - 'FAIL' | Grid Leakage Current Damage
09:33 - 'FAIL' | Thermal Runaway
10:33 - Microphony Test
11:14 - Who is this for?

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