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Audio and Video Talk
Valves / Vacuum Tubes
AVO VAlve Testers
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<blockquote data-quote="Moonraker" data-source="post: 1097134" data-attributes="member: 24248"><p>Schottky diodes are not required. 4007's work well enough and yield protection which is safely out of the meter's full scale range.</p><p></p><p>Hmmm.. these testers are still widely discussed. Just a pity that they are rather limited in one very important respect, especially for power amplifier users : they do not indicate control grid leakage current. Sometimes you can observe unstable anode current as a result, but not always.</p><p></p><p>The audio tube user can rather build a dedicated quick and cheap tester, with only the socket and measuring range required. And indication of grid leak - very important!</p></blockquote><p></p>
[QUOTE="Moonraker, post: 1097134, member: 24248"] Schottky diodes are not required. 4007's work well enough and yield protection which is safely out of the meter's full scale range. Hmmm.. these testers are still widely discussed. Just a pity that they are rather limited in one very important respect, especially for power amplifier users : they do not indicate control grid leakage current. Sometimes you can observe unstable anode current as a result, but not always. The audio tube user can rather build a dedicated quick and cheap tester, with only the socket and measuring range required. And indication of grid leak - very important! [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
AVO VAlve Testers
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