Bottlehead Forum
Bottlehead Kits => Moreplay => Topic started by: barbz on April 22, 2022, 01:22:23 PM
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Hi all
In the process of planning out a new build (more play with a d class amp) and I was wondering if anyone had been able to add a trigger output to the more play.so that when the unit is powered on I can trigger the d class amp to power on.
Ideally this needs to be between 5-19v and terminated with a 3.5/2.5mm socket but I'm not sure where to source the power feed from without impacting the pre.
Thankyou
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You could try using one of the 6V6 cathodes as the trigger. The fun part about this is that your class D amp wouldn't come on until the tubes were warmed up and playing.
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Thanks Paul,
Would that be safe and not cause any additional loading on that circuit?
Thankyou
Paul
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You could give it a shot and see. I don't believe that triggers use any meaningful amount of power, but there's always the possibility that you could introduce some noise. If that's the case, you could make a little rectified DC supply off the heater winding instead.