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Audio and Video Talk
Valves / Vacuum Tubes
el'Cheapo tube tester
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<blockquote data-quote="Ufudu" data-source="post: 960805" data-attributes="member: 16901"><p>Here is an update on my DIY tube curve tracer.</p><p></p><p>I have used an Al toolbox as the enclosure. It's bigger than it needs to be but it does the job.</p><p></p><p>Final voltage and current ranges are as follows:</p><p></p><p>Anode sweep voltage: 0-150, 0-200, 0-300, 0-400V; Iamax = 300mA</p><p>Screen fixed voltage: 100-300V in 10V increments; Ismax = 100mA</p><p>Grid fixed voltage: 0 to -100V in 0.1V increments</p><p></p><p>Measure a batch of Ia and Is for up to 99 grid voltage steps at a fixed screen voltage;</p><p>Measure up to 9 batches sequentially (all test parameters can be changed for each individual batch)</p><p></p><p>Estimated accuracy:</p><p></p><p>Va 2%</p><p>Vs +- 1%;</p><p>Ia +- 2% & +- 0.4mA;</p><p>Is +- 1% & +- 0.1mA;</p><p>Vg +- 0.1V</p><p></p><p><a href="https://postimg.cc/9RLPQ6t8" target="_blank"><img src="https://i.postimg.cc/9RLPQ6t8/IMG-2363.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><a href="https://postimg.cc/CndGBccF" target="_blank"><img src="https://i.postimg.cc/CndGBccF/IMG-2361.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p></blockquote><p></p>
[QUOTE="Ufudu, post: 960805, member: 16901"] Here is an update on my DIY tube curve tracer. I have used an Al toolbox as the enclosure. It's bigger than it needs to be but it does the job. Final voltage and current ranges are as follows: Anode sweep voltage: 0-150, 0-200, 0-300, 0-400V; Iamax = 300mA Screen fixed voltage: 100-300V in 10V increments; Ismax = 100mA Grid fixed voltage: 0 to -100V in 0.1V increments Measure a batch of Ia and Is for up to 99 grid voltage steps at a fixed screen voltage; Measure up to 9 batches sequentially (all test parameters can be changed for each individual batch) Estimated accuracy: Va 2% Vs +- 1%; Ia +- 2% & +- 0.4mA; Is +- 1% & +- 0.1mA; Vg +- 0.1V [url=https://postimg.cc/9RLPQ6t8][IMG]https://i.postimg.cc/9RLPQ6t8/IMG-2363.jpg[/IMG][/url] [url=https://postimg.cc/CndGBccF][IMG]https://i.postimg.cc/CndGBccF/IMG-2361.jpg[/IMG][/url] [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
el'Cheapo tube tester
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