[SripBoard Design] Starving Student Millett Hybrid Vacum Tube Amp
Dec 26, 2011 at 9:33 AM Post #162 of 269
And its done, everything is wired up and double checked. When i plug it in, with a source active, nothing happens, no sound nothing glows inside the tubes, nothing at all. A little annoyed.
 
Is there any ways to check if the tubes are OK?
 
Checked conductivity between pin 4 and 5, and nothing.
 
EDIT: 9 and 4, 9 and 5 conducts
 

 
Dec 26, 2011 at 10:11 AM Post #163 of 269
Some of the power supplies struggle a little to fire up a cold amp, so the power supply may cycle on and off a few times until the heaters get hot.
 
It takes the heaters more than a few seconds to get hot enough to warm the cathode sufficiently to begin emitting electrons, completing the circuit and allowing you to hear music.
 

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