Space-charge tetrodes in Inverted Mode - Page 2 - diyAudio
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Old 17th November 2012, 07:20 PM   #11
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That is the thing. I do not feel like melting anything but I do not have the max grid power allowed info to limit the current if needed.

Is it inherently safe from melting when all tube terminals operate with maximum of 24V on them, or do I still need to insert current limiting resistor ?
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Old 18th November 2012, 05:15 PM   #12
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Before I start melting grids I decided to try to simulate the circuit with LTspice using 12K5. I found a model that might work here on diyaudio but I do not yet know how to associate drawing of a tetrode with its correct model so that I do not get a message "model not found" or "library not found" when I try to run the simulation. Does anyone know an easiest step-by-step method to do that, or can you provide a link that shows the steps required in LTspice ? Thank you so much !
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