Thread: Testing valves
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Old 17th September 2019, 12:20 PM
Riggers Riggers is offline
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Join Date: Aug 2012
Location: Brisbane, Queensland. Aus
Posts: 62
Default Testing valves

Hi all
This might be a stupid question and I know Dr John has covered the subject of valve life before, but due to the fact valve testers are hard to come by in my part of the world (and bl@#*y expensive given units for sale are decades old and uncalibrated)....... Is it possible to get an accurate read on valve strength based on power output of the amp. You see I DO have a sig gen and ‘scope. If I measured a decline in output (say comparing two readings 6 months apart) would that aid in knowing when it’s time to replace valves?
Cheers once again
Phil.
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